Header And Logo
|
#include "postgres.h"#include <fcntl.h>#include <limits.h>#include <signal.h>#include <time.h>#include <unistd.h>#include <sys/socket.h>#include "rusagestub.h"#include "access/printtup.h"#include "access/xact.h"#include "catalog/pg_type.h"#include "commands/async.h"#include "commands/prepare.h"#include "libpq/libpq.h"#include "libpq/pqformat.h"#include "libpq/pqsignal.h"#include "miscadmin.h"#include "nodes/print.h"#include "optimizer/planner.h"#include "pgstat.h"#include "pg_trace.h"#include "parser/analyze.h"#include "parser/parser.h"#include "postmaster/autovacuum.h"#include "postmaster/postmaster.h"#include "replication/walsender.h"#include "rewrite/rewriteHandler.h"#include "storage/bufmgr.h"#include "storage/ipc.h"#include "storage/proc.h"#include "storage/procsignal.h"#include "storage/sinval.h"#include "tcop/fastpath.h"#include "tcop/pquery.h"#include "tcop/tcopprot.h"#include "tcop/utility.h"#include "utils/lsyscache.h"#include "utils/memutils.h"#include "utils/ps_status.h"#include "utils/snapmgr.h"#include "utils/timeout.h"#include "utils/timestamp.h"#include "mb/pg_wchar.h"
Go to the source code of this file.
Functions | |
| static int | InteractiveBackend (StringInfo inBuf) |
| static int | interactive_getc (void) |
| static int | SocketBackend (StringInfo inBuf) |
| static int | ReadCommand (StringInfo inBuf) |
| static void | forbidden_in_wal_sender (char firstchar) |
| static List * | pg_rewrite_query (Query *query) |
| static bool | check_log_statement (List *stmt_list) |
| static int | errdetail_execute (List *raw_parsetree_list) |
| static int | errdetail_params (ParamListInfo params) |
| static int | errdetail_abort (void) |
| static int | errdetail_recovery_conflict (void) |
| static void | start_xact_command (void) |
| static void | finish_xact_command (void) |
| static bool | IsTransactionExitStmt (Node *parsetree) |
| static bool | IsTransactionExitStmtList (List *parseTrees) |
| static bool | IsTransactionStmtList (List *parseTrees) |
| static void | drop_unnamed_stmt (void) |
| static void | SigHupHandler (SIGNAL_ARGS) |
| static void | log_disconnections (int code, Datum arg) |
| void | prepare_for_client_read (void) |
| void | client_read_ended (void) |
| List * | pg_parse_query (const char *query_string) |
| List * | pg_analyze_and_rewrite (Node *parsetree, const char *query_string, Oid *paramTypes, int numParams) |
| List * | pg_analyze_and_rewrite_params (Node *parsetree, const char *query_string, ParserSetupHook parserSetup, void *parserSetupArg) |
| PlannedStmt * | pg_plan_query (Query *querytree, int cursorOptions, ParamListInfo boundParams) |
| List * | pg_plan_queries (List *querytrees, int cursorOptions, ParamListInfo boundParams) |
| static void | exec_simple_query (const char *query_string) |
| static void | exec_parse_message (const char *query_string, const char *stmt_name, Oid *paramTypes, int numParams) |
| static void | exec_bind_message (StringInfo input_message) |
| static void | exec_execute_message (const char *portal_name, long max_rows) |
| int | check_log_duration (char *msec_str, bool was_logged) |
| static void | exec_describe_statement_message (const char *stmt_name) |
| static void | exec_describe_portal_message (const char *portal_name) |
| void | quickdie (SIGNAL_ARGS) |
| void | die (SIGNAL_ARGS) |
| void | StatementCancelHandler (SIGNAL_ARGS) |
| void | FloatExceptionHandler (SIGNAL_ARGS) |
| void | RecoveryConflictInterrupt (ProcSignalReason reason) |
| void | ProcessInterrupts (void) |
| pg_stack_base_t | set_stack_base (void) |
| void | restore_stack_base (pg_stack_base_t base) |
| void | check_stack_depth (void) |
| bool | check_max_stack_depth (int *newval, void **extra, GucSource source) |
| void | assign_max_stack_depth (int newval, void *extra) |
| void | set_debug_options (int debug_flag, GucContext context, GucSource source) |
| bool | set_plan_disabling_options (const char *arg, GucContext context, GucSource source) |
| const char * | get_stats_option_name (const char *arg) |
| void | process_postgres_switches (int argc, char *argv[], GucContext ctx, const char **dbname) |
| void | PostgresMain (int argc, char *argv[], const char *dbname, const char *username) |
| long | get_stack_depth_rlimit (void) |
| void | ResetUsage (void) |
| void | ShowUsage (const char *title) |
Variables | |
| char * | optarg |
| int | optind |
| const char * | debug_query_string |
| CommandDest | whereToSendOutput = DestDebug |
| bool | Log_disconnections = false |
| int | log_statement = LOGSTMT_NONE |
| int | max_stack_depth = 100 |
| int | PostAuthDelay = 0 |
| static long | max_stack_depth_bytes = 100 * 1024L |
| char * | stack_base_ptr = NULL |
| static volatile sig_atomic_t | got_SIGHUP = false |
| static bool | xact_started = false |
| static bool | DoingCommandRead = false |
| static bool | doing_extended_query_message = false |
| static bool | ignore_till_sync = false |
| static CachedPlanSource * | unnamed_stmt_psrc = NULL |
| static const char * | userDoption = NULL |
| static bool | EchoQuery = false |
| static int | UseNewLine = 1 |
| static bool | RecoveryConflictPending = false |
| static bool | RecoveryConflictRetryable = true |
| static ProcSignalReason | RecoveryConflictReason |
| static struct rusage | Save_r |
| static struct timeval | Save_t |
| void assign_max_stack_depth | ( | int | newval, | |
| void * | extra | |||
| ) |
Definition at line 3129 of file postgres.c.
References max_stack_depth_bytes.
{
long newval_bytes = newval * 1024L;
max_stack_depth_bytes = newval_bytes;
}
| int check_log_duration | ( | char * | msec_str, | |
| bool | was_logged | |||
| ) |
Definition at line 2046 of file postgres.c.
References GetCurrentStatementStartTimestamp(), GetCurrentTimestamp(), log_duration, log_min_duration_statement, snprintf(), and TimestampDifference().
Referenced by exec_bind_message(), exec_execute_message(), exec_parse_message(), exec_simple_query(), and HandleFunctionRequest().
{
if (log_duration || log_min_duration_statement >= 0)
{
long secs;
int usecs;
int msecs;
bool exceeded;
TimestampDifference(GetCurrentStatementStartTimestamp(),
GetCurrentTimestamp(),
&secs, &usecs);
msecs = usecs / 1000;
/*
* This odd-looking test for log_min_duration_statement being exceeded
* is designed to avoid integer overflow with very long durations:
* don't compute secs * 1000 until we've verified it will fit in int.
*/
exceeded = (log_min_duration_statement == 0 ||
(log_min_duration_statement > 0 &&
(secs > log_min_duration_statement / 1000 ||
secs * 1000 + msecs >= log_min_duration_statement)));
if (exceeded || log_duration)
{
snprintf(msec_str, 32, "%ld.%03d",
secs * 1000 + msecs, usecs % 1000);
if (exceeded && !was_logged)
return 2;
else
return 1;
}
}
return 0;
}
Definition at line 2009 of file postgres.c.
References GetCommandLogLevel(), lfirst, log_statement, LOGSTMT_ALL, and LOGSTMT_NONE.
Referenced by exec_execute_message(), and exec_simple_query().
{
ListCell *stmt_item;
if (log_statement == LOGSTMT_NONE)
return false;
if (log_statement == LOGSTMT_ALL)
return true;
/* Else we have to inspect the statement(s) to see whether to log */
foreach(stmt_item, stmt_list)
{
Node *stmt = (Node *) lfirst(stmt_item);
if (GetCommandLogLevel(stmt) <= log_statement)
return true;
}
return false;
}
Definition at line 3112 of file postgres.c.
References get_stack_depth_rlimit(), GUC_check_errdetail, GUC_check_errhint, and STACK_DEPTH_SLOP.
{
long newval_bytes = *newval * 1024L;
long stack_rlimit = get_stack_depth_rlimit();
if (stack_rlimit > 0 && newval_bytes > stack_rlimit - STACK_DEPTH_SLOP)
{
GUC_check_errdetail("\"max_stack_depth\" must not exceed %ldkB.",
(stack_rlimit - STACK_DEPTH_SLOP) / 1024L);
GUC_check_errhint("Increase the platform's stack depth limit via \"ulimit -s\" or local equivalent.");
return false;
}
return true;
}
| void check_stack_depth | ( | void | ) |
Definition at line 3051 of file postgres.c.
References ereport, errcode(), errhint(), errmsg(), ERROR, max_stack_depth, max_stack_depth_bytes, NULL, and stack_base_ptr.
Referenced by addone(), clean_fakeval_intree(), clean_NOT_intree(), cntsize(), contains_required_value(), copyObject(), Cover(), dofindsubquery(), EventTriggerInvoke(), ExecInitExpr(), ExecMakeFunctionResult(), ExecMakeFunctionResultNoSets(), execute(), expression_tree_mutator(), expression_tree_walker(), fillQT(), findoprnd_recurse(), freetree(), infix(), inline_set_returning_function(), JumbleExpr(), makepol(), plainnode(), plperl_hash_from_tuple(), plperl_sv_to_datum(), QT2QTN(), QTNBinary(), QTNClearFlags(), QTNCopy(), QTNFree(), QTNodeCompare(), QTNSort(), QTNTernary(), raw_expression_tree_walker(), split_array(), transformExprRecurse(), transformSetOperationTree(), TS_execute(), tsquery_opr_selec(), and tsquery_requires_match().
{
char stack_top_loc;
long stack_depth;
/*
* Compute distance from reference point to my local variables
*/
stack_depth = (long) (stack_base_ptr - &stack_top_loc);
/*
* Take abs value, since stacks grow up on some machines, down on others
*/
if (stack_depth < 0)
stack_depth = -stack_depth;
/*
* Trouble?
*
* The test on stack_base_ptr prevents us from erroring out if called
* during process setup or in a non-backend process. Logically it should
* be done first, but putting it here avoids wasting cycles during normal
* cases.
*/
if (stack_depth > max_stack_depth_bytes &&
stack_base_ptr != NULL)
{
ereport(ERROR,
(errcode(ERRCODE_STATEMENT_TOO_COMPLEX),
errmsg("stack depth limit exceeded"),
errhint("Increase the configuration parameter \"max_stack_depth\" (currently %dkB), "
"after ensuring the platform's stack depth limit is adequate.",
max_stack_depth)));
}
/*
* On IA64 there is a separate "register" stack that requires its own
* independent check. For this, we have to measure the change in the
* "BSP" pointer from PostgresMain to here. Logic is just as above,
* except that we know IA64's register stack grows up.
*
* Note we assume that the same max_stack_depth applies to both stacks.
*/
#if defined(__ia64__) || defined(__ia64)
stack_depth = (long) (ia64_get_bsp() - register_stack_base_ptr);
if (stack_depth > max_stack_depth_bytes &&
register_stack_base_ptr != NULL)
{
ereport(ERROR,
(errcode(ERRCODE_STATEMENT_TOO_COMPLEX),
errmsg("stack depth limit exceeded"),
errhint("Increase the configuration parameter \"max_stack_depth\" (currently %dkB), "
"after ensuring the platform's stack depth limit is adequate.",
max_stack_depth)));
}
#endif /* IA64 */
}
| void client_read_ended | ( | void | ) |
Definition at line 531 of file postgres.c.
References DisableCatchupInterrupt(), DisableNotifyInterrupt(), DoingCommandRead, and ImmediateInterruptOK.
Referenced by interactive_getc(), and secure_read().
{
if (DoingCommandRead)
{
ImmediateInterruptOK = false;
DisableNotifyInterrupt();
DisableCatchupInterrupt();
}
}
| void die | ( | SIGNAL_ARGS | ) |
Definition at line 2576 of file postgres.c.
References CritSectionCount, DisableCatchupInterrupt(), DisableNotifyInterrupt(), ImmediateInterruptOK, InterruptHoldoffCount, InterruptPending, LockErrorCleanup(), MyProc, proc_exit_inprogress, ProcDiePending, ProcessInterrupts(), PGPROC::procLatch, and SetLatch().
{
int save_errno = errno;
/* Don't joggle the elbow of proc_exit */
if (!proc_exit_inprogress)
{
InterruptPending = true;
ProcDiePending = true;
/*
* If it's safe to interrupt, and we're waiting for input or a lock,
* service the interrupt immediately
*/
if (ImmediateInterruptOK && InterruptHoldoffCount == 0 &&
CritSectionCount == 0)
{
/* bump holdoff count to make ProcessInterrupts() a no-op */
/* until we are done getting ready for it */
InterruptHoldoffCount++;
LockErrorCleanup(); /* prevent CheckDeadLock from running */
DisableNotifyInterrupt();
DisableCatchupInterrupt();
InterruptHoldoffCount--;
ProcessInterrupts();
}
}
/* If we're still here, waken anything waiting on the process latch */
if (MyProc)
SetLatch(&MyProc->procLatch);
errno = save_errno;
}
| static void drop_unnamed_stmt | ( | void | ) | [static] |
Definition at line 2497 of file postgres.c.
References DropCachedPlan().
Referenced by exec_parse_message(), exec_simple_query(), and PostgresMain().
{
/* paranoia to avoid a dangling pointer in case of error */
if (unnamed_stmt_psrc)
{
CachedPlanSource *psrc = unnamed_stmt_psrc;
unnamed_stmt_psrc = NULL;
DropCachedPlan(psrc);
}
}
| static int errdetail_abort | ( | void | ) | [static] |
Definition at line 2186 of file postgres.c.
References errdetail(), MyProc, and PGPROC::recoveryConflictPending.
Referenced by exec_bind_message(), exec_describe_portal_message(), exec_describe_statement_message(), exec_execute_message(), exec_parse_message(), and exec_simple_query().
{
if (MyProc->recoveryConflictPending)
errdetail("abort reason: recovery conflict");
return 0;
}
| static int errdetail_execute | ( | List * | raw_parsetree_list | ) | [static] |
Definition at line 2091 of file postgres.c.
References errdetail(), FetchPreparedStatement(), IsA, lfirst, ExecuteStmt::name, PreparedStatement::plansource, and CachedPlanSource::query_string.
Referenced by exec_simple_query().
{
ListCell *parsetree_item;
foreach(parsetree_item, raw_parsetree_list)
{
Node *parsetree = (Node *) lfirst(parsetree_item);
if (IsA(parsetree, ExecuteStmt))
{
ExecuteStmt *stmt = (ExecuteStmt *) parsetree;
PreparedStatement *pstmt;
pstmt = FetchPreparedStatement(stmt->name, false);
if (pstmt)
{
errdetail("prepare: %s", pstmt->plansource->query_string);
return 0;
}
}
}
return 0;
}
| static int errdetail_params | ( | ParamListInfo | params | ) | [static] |
Definition at line 2122 of file postgres.c.
References appendStringInfo(), appendStringInfoCharMacro, appendStringInfoString(), StringInfoData::data, errdetail(), getTypeOutputInfo(), initStringInfo(), IsAbortedTransactionBlockState(), ParamExternData::isnull, MemoryContextSwitchTo(), MessageContext, ParamListInfoData::numParams, OidIsValid, OidOutputFunctionCall(), ParamListInfoData::params, pfree(), ParamExternData::ptype, and ParamExternData::value.
Referenced by exec_bind_message(), and exec_execute_message().
{
/* We mustn't call user-defined I/O functions when in an aborted xact */
if (params && params->numParams > 0 && !IsAbortedTransactionBlockState())
{
StringInfoData param_str;
MemoryContext oldcontext;
int paramno;
/* Make sure any trash is generated in MessageContext */
oldcontext = MemoryContextSwitchTo(MessageContext);
initStringInfo(¶m_str);
for (paramno = 0; paramno < params->numParams; paramno++)
{
ParamExternData *prm = ¶ms->params[paramno];
Oid typoutput;
bool typisvarlena;
char *pstring;
char *p;
appendStringInfo(¶m_str, "%s$%d = ",
paramno > 0 ? ", " : "",
paramno + 1);
if (prm->isnull || !OidIsValid(prm->ptype))
{
appendStringInfoString(¶m_str, "NULL");
continue;
}
getTypeOutputInfo(prm->ptype, &typoutput, &typisvarlena);
pstring = OidOutputFunctionCall(typoutput, prm->value);
appendStringInfoCharMacro(¶m_str, '\'');
for (p = pstring; *p; p++)
{
if (*p == '\'') /* double single quotes */
appendStringInfoCharMacro(¶m_str, *p);
appendStringInfoCharMacro(¶m_str, *p);
}
appendStringInfoCharMacro(¶m_str, '\'');
pfree(pstring);
}
errdetail("parameters: %s", param_str.data);
pfree(param_str.data);
MemoryContextSwitchTo(oldcontext);
}
return 0;
}
| static int errdetail_recovery_conflict | ( | void | ) | [static] |
Definition at line 2200 of file postgres.c.
References errdetail(), PROCSIG_RECOVERY_CONFLICT_BUFFERPIN, PROCSIG_RECOVERY_CONFLICT_DATABASE, PROCSIG_RECOVERY_CONFLICT_LOCK, PROCSIG_RECOVERY_CONFLICT_SNAPSHOT, PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK, PROCSIG_RECOVERY_CONFLICT_TABLESPACE, and RecoveryConflictReason.
Referenced by ProcessInterrupts().
{
switch (RecoveryConflictReason)
{
case PROCSIG_RECOVERY_CONFLICT_BUFFERPIN:
errdetail("User was holding shared buffer pin for too long.");
break;
case PROCSIG_RECOVERY_CONFLICT_LOCK:
errdetail("User was holding a relation lock for too long.");
break;
case PROCSIG_RECOVERY_CONFLICT_TABLESPACE:
errdetail("User was or might have been using tablespace that must be dropped.");
break;
case PROCSIG_RECOVERY_CONFLICT_SNAPSHOT:
errdetail("User query might have needed to see row versions that must be removed.");
break;
case PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK:
errdetail("User transaction caused buffer deadlock with recovery.");
break;
case PROCSIG_RECOVERY_CONFLICT_DATABASE:
errdetail("User was connected to a database that must be dropped.");
break;
default:
break;
/* no errdetail */
}
return 0;
}
| static void exec_bind_message | ( | StringInfo | input_message | ) | [static] |
Definition at line 1407 of file postgres.c.
References analyze_requires_snapshot(), check_log_duration(), CachedPlanSource::commandTag, CreatePortal(), StringInfoData::cursor, StringInfoData::data, DEBUG2, debug_query_string, DestRemote, ereport, errcode(), errdetail_abort(), errdetail_params(), errhidestmt(), errmsg(), ERROR, FetchPreparedStatement(), GetCachedPlan(), GetTransactionSnapshot(), getTypeBinaryInputInfo(), getTypeInputInfo(), i, InvalidSnapshot, IsAbortedTransactionBlockState(), ParamExternData::isnull, IsTransactionExitStmt(), StringInfoData::len, LOG, log_statement_stats, StringInfoData::maxlen, MemoryContextSwitchTo(), MessageContext, CachedPlanSource::num_params, ParamListInfoData::numParams, OidInputFunctionCall(), OidReceiveFunctionCall(), palloc(), CachedPlanSource::param_types, ParamListInfoData::paramFetch, ParamListInfoData::paramFetchArg, ParamListInfoData::params, ParamListInfoData::parserSetup, ParamListInfoData::parserSetupArg, ParamExternData::pflags, pfree(), pg_client_to_server(), pgstat_report_activity(), PreparedStatement::plansource, PopActiveSnapshot(), PortalDefineQuery(), PortalGetHeapMemory, PortalSetResultFormat(), PortalStart(), pq_getmsgbytes(), pq_getmsgend(), pq_getmsgint(), pq_getmsgstring(), pq_putemptymessage(), pstrdup(), ParamExternData::ptype, PushActiveSnapshot(), CachedPlanSource::query_string, CachedPlanSource::raw_parse_tree, ResetUsage(), set_ps_display(), ShowUsage(), start_xact_command(), STATE_RUNNING, CachedPlan::stmt_list, ParamExternData::value, and whereToSendOutput.
Referenced by PostgresMain().
{
const char *portal_name;
const char *stmt_name;
int numPFormats;
int16 *pformats = NULL;
int numParams;
int numRFormats;
int16 *rformats = NULL;
CachedPlanSource *psrc;
CachedPlan *cplan;
Portal portal;
char *query_string;
char *saved_stmt_name;
ParamListInfo params;
MemoryContext oldContext;
bool save_log_statement_stats = log_statement_stats;
bool snapshot_set = false;
char msec_str[32];
/* Get the fixed part of the message */
portal_name = pq_getmsgstring(input_message);
stmt_name = pq_getmsgstring(input_message);
ereport(DEBUG2,
(errmsg("bind %s to %s",
*portal_name ? portal_name : "<unnamed>",
*stmt_name ? stmt_name : "<unnamed>")));
/* Find prepared statement */
if (stmt_name[0] != '\0')
{
PreparedStatement *pstmt;
pstmt = FetchPreparedStatement(stmt_name, true);
psrc = pstmt->plansource;
}
else
{
/* special-case the unnamed statement */
psrc = unnamed_stmt_psrc;
if (!psrc)
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_PSTATEMENT),
errmsg("unnamed prepared statement does not exist")));
}
/*
* Report query to various monitoring facilities.
*/
debug_query_string = psrc->query_string;
pgstat_report_activity(STATE_RUNNING, psrc->query_string);
set_ps_display("BIND", false);
if (save_log_statement_stats)
ResetUsage();
/*
* Start up a transaction command so we can call functions etc. (Note that
* this will normally change current memory context.) Nothing happens if
* we are already in one.
*/
start_xact_command();
/* Switch back to message context */
MemoryContextSwitchTo(MessageContext);
/* Get the parameter format codes */
numPFormats = pq_getmsgint(input_message, 2);
if (numPFormats > 0)
{
int i;
pformats = (int16 *) palloc(numPFormats * sizeof(int16));
for (i = 0; i < numPFormats; i++)
pformats[i] = pq_getmsgint(input_message, 2);
}
/* Get the parameter value count */
numParams = pq_getmsgint(input_message, 2);
if (numPFormats > 1 && numPFormats != numParams)
ereport(ERROR,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("bind message has %d parameter formats but %d parameters",
numPFormats, numParams)));
if (numParams != psrc->num_params)
ereport(ERROR,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("bind message supplies %d parameters, but prepared statement \"%s\" requires %d",
numParams, stmt_name, psrc->num_params)));
/*
* If we are in aborted transaction state, the only portals we can
* actually run are those containing COMMIT or ROLLBACK commands. We
* disallow binding anything else to avoid problems with infrastructure
* that expects to run inside a valid transaction. We also disallow
* binding any parameters, since we can't risk calling user-defined I/O
* functions.
*/
if (IsAbortedTransactionBlockState() &&
(!IsTransactionExitStmt(psrc->raw_parse_tree) ||
numParams != 0))
ereport(ERROR,
(errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
errmsg("current transaction is aborted, "
"commands ignored until end of transaction block"),
errdetail_abort()));
/*
* Create the portal. Allow silent replacement of an existing portal only
* if the unnamed portal is specified.
*/
if (portal_name[0] == '\0')
portal = CreatePortal(portal_name, true, true);
else
portal = CreatePortal(portal_name, false, false);
/*
* Prepare to copy stuff into the portal's memory context. We do all this
* copying first, because it could possibly fail (out-of-memory) and we
* don't want a failure to occur between GetCachedPlan and
* PortalDefineQuery; that would result in leaking our plancache refcount.
*/
oldContext = MemoryContextSwitchTo(PortalGetHeapMemory(portal));
/* Copy the plan's query string into the portal */
query_string = pstrdup(psrc->query_string);
/* Likewise make a copy of the statement name, unless it's unnamed */
if (stmt_name[0])
saved_stmt_name = pstrdup(stmt_name);
else
saved_stmt_name = NULL;
/*
* Set a snapshot if we have parameters to fetch (since the input
* functions might need it) or the query isn't a utility command (and
* hence could require redoing parse analysis and planning). We keep the
* snapshot active till we're done, so that plancache.c doesn't have to
* take new ones.
*/
if (numParams > 0 || analyze_requires_snapshot(psrc->raw_parse_tree))
{
PushActiveSnapshot(GetTransactionSnapshot());
snapshot_set = true;
}
/*
* Fetch parameters, if any, and store in the portal's memory context.
*/
if (numParams > 0)
{
int paramno;
/* sizeof(ParamListInfoData) includes the first array element */
params = (ParamListInfo) palloc(sizeof(ParamListInfoData) +
(numParams - 1) * sizeof(ParamExternData));
/* we have static list of params, so no hooks needed */
params->paramFetch = NULL;
params->paramFetchArg = NULL;
params->parserSetup = NULL;
params->parserSetupArg = NULL;
params->numParams = numParams;
for (paramno = 0; paramno < numParams; paramno++)
{
Oid ptype = psrc->param_types[paramno];
int32 plength;
Datum pval;
bool isNull;
StringInfoData pbuf;
char csave;
int16 pformat;
plength = pq_getmsgint(input_message, 4);
isNull = (plength == -1);
if (!isNull)
{
const char *pvalue = pq_getmsgbytes(input_message, plength);
/*
* Rather than copying data around, we just set up a phony
* StringInfo pointing to the correct portion of the message
* buffer. We assume we can scribble on the message buffer so
* as to maintain the convention that StringInfos have a
* trailing null. This is grotty but is a big win when
* dealing with very large parameter strings.
*/
pbuf.data = (char *) pvalue;
pbuf.maxlen = plength + 1;
pbuf.len = plength;
pbuf.cursor = 0;
csave = pbuf.data[plength];
pbuf.data[plength] = '\0';
}
else
{
pbuf.data = NULL; /* keep compiler quiet */
csave = 0;
}
if (numPFormats > 1)
pformat = pformats[paramno];
else if (numPFormats > 0)
pformat = pformats[0];
else
pformat = 0; /* default = text */
if (pformat == 0) /* text mode */
{
Oid typinput;
Oid typioparam;
char *pstring;
getTypeInputInfo(ptype, &typinput, &typioparam);
/*
* We have to do encoding conversion before calling the
* typinput routine.
*/
if (isNull)
pstring = NULL;
else
pstring = pg_client_to_server(pbuf.data, plength);
pval = OidInputFunctionCall(typinput, pstring, typioparam, -1);
/* Free result of encoding conversion, if any */
if (pstring && pstring != pbuf.data)
pfree(pstring);
}
else if (pformat == 1) /* binary mode */
{
Oid typreceive;
Oid typioparam;
StringInfo bufptr;
/*
* Call the parameter type's binary input converter
*/
getTypeBinaryInputInfo(ptype, &typreceive, &typioparam);
if (isNull)
bufptr = NULL;
else
bufptr = &pbuf;
pval = OidReceiveFunctionCall(typreceive, bufptr, typioparam, -1);
/* Trouble if it didn't eat the whole buffer */
if (!isNull && pbuf.cursor != pbuf.len)
ereport(ERROR,
(errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
errmsg("incorrect binary data format in bind parameter %d",
paramno + 1)));
}
else
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("unsupported format code: %d",
pformat)));
pval = 0; /* keep compiler quiet */
}
/* Restore message buffer contents */
if (!isNull)
pbuf.data[plength] = csave;
params->params[paramno].value = pval;
params->params[paramno].isnull = isNull;
/*
* We mark the params as CONST. This ensures that any custom plan
* makes full use of the parameter values.
*/
params->params[paramno].pflags = PARAM_FLAG_CONST;
params->params[paramno].ptype = ptype;
}
}
else
params = NULL;
/* Done storing stuff in portal's context */
MemoryContextSwitchTo(oldContext);
/* Get the result format codes */
numRFormats = pq_getmsgint(input_message, 2);
if (numRFormats > 0)
{
int i;
rformats = (int16 *) palloc(numRFormats * sizeof(int16));
for (i = 0; i < numRFormats; i++)
rformats[i] = pq_getmsgint(input_message, 2);
}
pq_getmsgend(input_message);
/*
* Obtain a plan from the CachedPlanSource. Any cruft from (re)planning
* will be generated in MessageContext. The plan refcount will be
* assigned to the Portal, so it will be released at portal destruction.
*/
cplan = GetCachedPlan(psrc, params, false);
/*
* Now we can define the portal.
*
* DO NOT put any code that could possibly throw an error between the
* above GetCachedPlan call and here.
*/
PortalDefineQuery(portal,
saved_stmt_name,
query_string,
psrc->commandTag,
cplan->stmt_list,
cplan);
/* Done with the snapshot used for parameter I/O and parsing/planning */
if (snapshot_set)
PopActiveSnapshot();
/*
* And we're ready to start portal execution.
*/
PortalStart(portal, params, 0, InvalidSnapshot);
/*
* Apply the result format requests to the portal.
*/
PortalSetResultFormat(portal, numRFormats, rformats);
/*
* Send BindComplete.
*/
if (whereToSendOutput == DestRemote)
pq_putemptymessage('2');
/*
* Emit duration logging if appropriate.
*/
switch (check_log_duration(msec_str, false))
{
case 1:
ereport(LOG,
(errmsg("duration: %s ms", msec_str),
errhidestmt(true)));
break;
case 2:
ereport(LOG,
(errmsg("duration: %s ms bind %s%s%s: %s",
msec_str,
*stmt_name ? stmt_name : "<unnamed>",
*portal_name ? "/" : "",
*portal_name ? portal_name : "",
psrc->query_string),
errhidestmt(true),
errdetail_params(params)));
break;
}
if (save_log_statement_stats)
ShowUsage("BIND MESSAGE STATISTICS");
debug_query_string = NULL;
}
| static void exec_describe_portal_message | ( | const char * | portal_name | ) | [static] |
Definition at line 2329 of file postgres.c.
References DestRemote, ereport, errcode(), errdetail_abort(), errmsg(), ERROR, FetchPortalTargetList(), PortalData::formats, GetPortalByName(), IsAbortedTransactionBlockState(), MemoryContextSwitchTo(), MessageContext, PortalIsValid, pq_putemptymessage(), SendRowDescriptionMessage(), start_xact_command(), PortalData::tupDesc, and whereToSendOutput.
Referenced by PostgresMain().
{
Portal portal;
/*
* Start up a transaction command. (Note that this will normally change
* current memory context.) Nothing happens if we are already in one.
*/
start_xact_command();
/* Switch back to message context */
MemoryContextSwitchTo(MessageContext);
portal = GetPortalByName(portal_name);
if (!PortalIsValid(portal))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_CURSOR),
errmsg("portal \"%s\" does not exist", portal_name)));
/*
* If we are in aborted transaction state, we can't run
* SendRowDescriptionMessage(), because that needs catalog accesses.
* Hence, refuse to Describe portals that return data. (We shouldn't just
* refuse all Describes, since that might break the ability of some
* clients to issue COMMIT or ROLLBACK commands, if they use code that
* blindly Describes whatever it does.)
*/
if (IsAbortedTransactionBlockState() &&
portal->tupDesc)
ereport(ERROR,
(errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
errmsg("current transaction is aborted, "
"commands ignored until end of transaction block"),
errdetail_abort()));
if (whereToSendOutput != DestRemote)
return; /* can't actually do anything... */
if (portal->tupDesc)
SendRowDescriptionMessage(portal->tupDesc,
FetchPortalTargetList(portal),
portal->formats);
else
pq_putemptymessage('n'); /* NoData */
}
| static void exec_describe_statement_message | ( | const char * | stmt_name | ) | [static] |
Definition at line 2236 of file postgres.c.
References Assert, buf, CachedPlanGetTargetList(), DestRemote, ereport, errcode(), errdetail_abort(), errmsg(), ERROR, FetchPreparedStatement(), CachedPlanSource::fixed_result, i, IsAbortedTransactionBlockState(), MemoryContextSwitchTo(), MessageContext, NULL, CachedPlanSource::num_params, CachedPlanSource::param_types, PreparedStatement::plansource, pq_beginmessage(), pq_endmessage(), pq_putemptymessage(), pq_sendint(), CachedPlanSource::resultDesc, SendRowDescriptionMessage(), start_xact_command(), and whereToSendOutput.
Referenced by PostgresMain().
{
CachedPlanSource *psrc;
StringInfoData buf;
int i;
/*
* Start up a transaction command. (Note that this will normally change
* current memory context.) Nothing happens if we are already in one.
*/
start_xact_command();
/* Switch back to message context */
MemoryContextSwitchTo(MessageContext);
/* Find prepared statement */
if (stmt_name[0] != '\0')
{
PreparedStatement *pstmt;
pstmt = FetchPreparedStatement(stmt_name, true);
psrc = pstmt->plansource;
}
else
{
/* special-case the unnamed statement */
psrc = unnamed_stmt_psrc;
if (!psrc)
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_PSTATEMENT),
errmsg("unnamed prepared statement does not exist")));
}
/* Prepared statements shouldn't have changeable result descs */
Assert(psrc->fixed_result);
/*
* If we are in aborted transaction state, we can't run
* SendRowDescriptionMessage(), because that needs catalog accesses.
* Hence, refuse to Describe statements that return data. (We shouldn't
* just refuse all Describes, since that might break the ability of some
* clients to issue COMMIT or ROLLBACK commands, if they use code that
* blindly Describes whatever it does.) We can Describe parameters
* without doing anything dangerous, so we don't restrict that.
*/
if (IsAbortedTransactionBlockState() &&
psrc->resultDesc)
ereport(ERROR,
(errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
errmsg("current transaction is aborted, "
"commands ignored until end of transaction block"),
errdetail_abort()));
if (whereToSendOutput != DestRemote)
return; /* can't actually do anything... */
/*
* First describe the parameters...
*/
pq_beginmessage(&buf, 't'); /* parameter description message type */
pq_sendint(&buf, psrc->num_params, 2);
for (i = 0; i < psrc->num_params; i++)
{
Oid ptype = psrc->param_types[i];
pq_sendint(&buf, (int) ptype, 4);
}
pq_endmessage(&buf);
/*
* Next send RowDescription or NoData to describe the result...
*/
if (psrc->resultDesc)
{
List *tlist;
/* Get the plan's primary targetlist */
tlist = CachedPlanGetTargetList(psrc);
SendRowDescriptionMessage(psrc->resultDesc, tlist, NULL);
}
else
pq_putemptymessage('n'); /* NoData */
}
| static void exec_execute_message | ( | const char * | portal_name, | |
| long | max_rows | |||
| ) | [static] |
Definition at line 1787 of file postgres.c.
References _, Assert, PortalData::atStart, BeginCommand(), CHECK_FOR_INTERRUPTS, check_log_duration(), check_log_statement(), CommandCounterIncrement(), PortalData::commandTag, CreateDestReceiver(), debug_query_string, DestRemote, DestRemoteExecute, EndCommand(), ereport, errcode(), errdetail_abort(), errdetail_params(), errhidestmt(), errmsg(), ERROR, finish_xact_command(), GetPortalByName(), IsAbortedTransactionBlockState(), IsTransactionExitStmtList(), IsTransactionStmtList(), LOG, log_statement_stats, NIL, NULL, NullCommand(), pgstat_report_activity(), PortalIsValid, PortalData::portalParams, PortalRun(), pq_putemptymessage(), PortalData::prepStmtName, pstrdup(), _DestReceiver::rDestroy, ResetUsage(), set_ps_display(), SetRemoteDestReceiverParams(), ShowUsage(), PortalData::sourceText, start_xact_command(), STATE_RUNNING, PortalData::stmts, and whereToSendOutput.
Referenced by PostgresMain().
{
CommandDest dest;
DestReceiver *receiver;
Portal portal;
bool completed;
char completionTag[COMPLETION_TAG_BUFSIZE];
const char *sourceText;
const char *prepStmtName;
ParamListInfo portalParams;
bool save_log_statement_stats = log_statement_stats;
bool is_xact_command;
bool execute_is_fetch;
bool was_logged = false;
char msec_str[32];
/* Adjust destination to tell printtup.c what to do */
dest = whereToSendOutput;
if (dest == DestRemote)
dest = DestRemoteExecute;
portal = GetPortalByName(portal_name);
if (!PortalIsValid(portal))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_CURSOR),
errmsg("portal \"%s\" does not exist", portal_name)));
/*
* If the original query was a null string, just return
* EmptyQueryResponse.
*/
if (portal->commandTag == NULL)
{
Assert(portal->stmts == NIL);
NullCommand(dest);
return;
}
/* Does the portal contain a transaction command? */
is_xact_command = IsTransactionStmtList(portal->stmts);
/*
* We must copy the sourceText and prepStmtName into MessageContext in
* case the portal is destroyed during finish_xact_command. Can avoid the
* copy if it's not an xact command, though.
*/
if (is_xact_command)
{
sourceText = pstrdup(portal->sourceText);
if (portal->prepStmtName)
prepStmtName = pstrdup(portal->prepStmtName);
else
prepStmtName = "<unnamed>";
/*
* An xact command shouldn't have any parameters, which is a good
* thing because they wouldn't be around after finish_xact_command.
*/
portalParams = NULL;
}
else
{
sourceText = portal->sourceText;
if (portal->prepStmtName)
prepStmtName = portal->prepStmtName;
else
prepStmtName = "<unnamed>";
portalParams = portal->portalParams;
}
/*
* Report query to various monitoring facilities.
*/
debug_query_string = sourceText;
pgstat_report_activity(STATE_RUNNING, sourceText);
set_ps_display(portal->commandTag, false);
if (save_log_statement_stats)
ResetUsage();
BeginCommand(portal->commandTag, dest);
/*
* Create dest receiver in MessageContext (we don't want it in transaction
* context, because that may get deleted if portal contains VACUUM).
*/
receiver = CreateDestReceiver(dest);
if (dest == DestRemoteExecute)
SetRemoteDestReceiverParams(receiver, portal);
/*
* Ensure we are in a transaction command (this should normally be the
* case already due to prior BIND).
*/
start_xact_command();
/*
* If we re-issue an Execute protocol request against an existing portal,
* then we are only fetching more rows rather than completely re-executing
* the query from the start. atStart is never reset for a v3 portal, so we
* are safe to use this check.
*/
execute_is_fetch = !portal->atStart;
/* Log immediately if dictated by log_statement */
if (check_log_statement(portal->stmts))
{
ereport(LOG,
(errmsg("%s %s%s%s: %s",
execute_is_fetch ?
_("execute fetch from") :
_("execute"),
prepStmtName,
*portal_name ? "/" : "",
*portal_name ? portal_name : "",
sourceText),
errhidestmt(true),
errdetail_params(portalParams)));
was_logged = true;
}
/*
* If we are in aborted transaction state, the only portals we can
* actually run are those containing COMMIT or ROLLBACK commands.
*/
if (IsAbortedTransactionBlockState() &&
!IsTransactionExitStmtList(portal->stmts))
ereport(ERROR,
(errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
errmsg("current transaction is aborted, "
"commands ignored until end of transaction block"),
errdetail_abort()));
/* Check for cancel signal before we start execution */
CHECK_FOR_INTERRUPTS();
/*
* Okay to run the portal.
*/
if (max_rows <= 0)
max_rows = FETCH_ALL;
completed = PortalRun(portal,
max_rows,
true, /* always top level */
receiver,
receiver,
completionTag);
(*receiver->rDestroy) (receiver);
if (completed)
{
if (is_xact_command)
{
/*
* If this was a transaction control statement, commit it. We
* will start a new xact command for the next command (if any).
*/
finish_xact_command();
}
else
{
/*
* We need a CommandCounterIncrement after every query, except
* those that start or end a transaction block.
*/
CommandCounterIncrement();
}
/* Send appropriate CommandComplete to client */
EndCommand(completionTag, dest);
}
else
{
/* Portal run not complete, so send PortalSuspended */
if (whereToSendOutput == DestRemote)
pq_putemptymessage('s');
}
/*
* Emit duration logging if appropriate.
*/
switch (check_log_duration(msec_str, was_logged))
{
case 1:
ereport(LOG,
(errmsg("duration: %s ms", msec_str),
errhidestmt(true)));
break;
case 2:
ereport(LOG,
(errmsg("duration: %s ms %s %s%s%s: %s",
msec_str,
execute_is_fetch ?
_("execute fetch from") :
_("execute"),
prepStmtName,
*portal_name ? "/" : "",
*portal_name ? portal_name : "",
sourceText),
errhidestmt(true),
errdetail_params(portalParams)));
break;
}
if (save_log_statement_stats)
ShowUsage("EXECUTE MESSAGE STATISTICS");
debug_query_string = NULL;
}
| static void exec_parse_message | ( | const char * | query_string, | |
| const char * | stmt_name, | |||
| Oid * | paramTypes, | |||
| int | numParams | |||
| ) | [static] |
Definition at line 1143 of file postgres.c.
References ALLOCSET_DEFAULT_INITSIZE, ALLOCSET_DEFAULT_MAXSIZE, ALLOCSET_DEFAULT_MINSIZE, AllocSetContextCreate(), analyze_requires_snapshot(), CHECK_FOR_INTERRUPTS, check_log_duration(), CommandCounterIncrement(), CompleteCachedPlan(), CachedPlanSource::context, CreateCachedPlan(), CreateCommandTag(), DEBUG2, debug_query_string, DestRemote, drop_unnamed_stmt(), ereport, errcode(), errdetail_abort(), errhidestmt(), errmsg(), ERROR, GetTransactionSnapshot(), i, InvalidOid, IsAbortedTransactionBlockState(), IsTransactionExitStmt(), linitial, list_length(), LOG, log_parser_stats, log_statement_stats, MemoryContextSetParent(), MemoryContextSwitchTo(), MessageContext, NIL, NULL, parse_analyze_varparams(), pg_parse_query(), pg_rewrite_query(), pgstat_report_activity(), PopActiveSnapshot(), pq_putemptymessage(), PushActiveSnapshot(), ResetUsage(), SaveCachedPlan(), set_ps_display(), ShowUsage(), start_xact_command(), STATE_RUNNING, StorePreparedStatement(), UNKNOWNOID, and whereToSendOutput.
Referenced by PostgresMain().
{
MemoryContext unnamed_stmt_context = NULL;
MemoryContext oldcontext;
List *parsetree_list;
Node *raw_parse_tree;
const char *commandTag;
List *querytree_list;
CachedPlanSource *psrc;
bool is_named;
bool save_log_statement_stats = log_statement_stats;
char msec_str[32];
/*
* Report query to various monitoring facilities.
*/
debug_query_string = query_string;
pgstat_report_activity(STATE_RUNNING, query_string);
set_ps_display("PARSE", false);
if (save_log_statement_stats)
ResetUsage();
ereport(DEBUG2,
(errmsg("parse %s: %s",
*stmt_name ? stmt_name : "<unnamed>",
query_string)));
/*
* Start up a transaction command so we can run parse analysis etc. (Note
* that this will normally change current memory context.) Nothing happens
* if we are already in one.
*/
start_xact_command();
/*
* Switch to appropriate context for constructing parsetrees.
*
* We have two strategies depending on whether the prepared statement is
* named or not. For a named prepared statement, we do parsing in
* MessageContext and copy the finished trees into the prepared
* statement's plancache entry; then the reset of MessageContext releases
* temporary space used by parsing and rewriting. For an unnamed prepared
* statement, we assume the statement isn't going to hang around long, so
* getting rid of temp space quickly is probably not worth the costs of
* copying parse trees. So in this case, we create the plancache entry's
* query_context here, and do all the parsing work therein.
*/
is_named = (stmt_name[0] != '\0');
if (is_named)
{
/* Named prepared statement --- parse in MessageContext */
oldcontext = MemoryContextSwitchTo(MessageContext);
}
else
{
/* Unnamed prepared statement --- release any prior unnamed stmt */
drop_unnamed_stmt();
/* Create context for parsing */
unnamed_stmt_context =
AllocSetContextCreate(MessageContext,
"unnamed prepared statement",
ALLOCSET_DEFAULT_MINSIZE,
ALLOCSET_DEFAULT_INITSIZE,
ALLOCSET_DEFAULT_MAXSIZE);
oldcontext = MemoryContextSwitchTo(unnamed_stmt_context);
}
/*
* Do basic parsing of the query or queries (this should be safe even if
* we are in aborted transaction state!)
*/
parsetree_list = pg_parse_query(query_string);
/*
* We only allow a single user statement in a prepared statement. This is
* mainly to keep the protocol simple --- otherwise we'd need to worry
* about multiple result tupdescs and things like that.
*/
if (list_length(parsetree_list) > 1)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("cannot insert multiple commands into a prepared statement")));
if (parsetree_list != NIL)
{
Query *query;
bool snapshot_set = false;
int i;
raw_parse_tree = (Node *) linitial(parsetree_list);
/*
* Get the command name for possible use in status display.
*/
commandTag = CreateCommandTag(raw_parse_tree);
/*
* If we are in an aborted transaction, reject all commands except
* COMMIT/ROLLBACK. It is important that this test occur before we
* try to do parse analysis, rewrite, or planning, since all those
* phases try to do database accesses, which may fail in abort state.
* (It might be safe to allow some additional utility commands in this
* state, but not many...)
*/
if (IsAbortedTransactionBlockState() &&
!IsTransactionExitStmt(raw_parse_tree))
ereport(ERROR,
(errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
errmsg("current transaction is aborted, "
"commands ignored until end of transaction block"),
errdetail_abort()));
/*
* Create the CachedPlanSource before we do parse analysis, since it
* needs to see the unmodified raw parse tree.
*/
psrc = CreateCachedPlan(raw_parse_tree, query_string, commandTag);
/*
* Set up a snapshot if parse analysis will need one.
*/
if (analyze_requires_snapshot(raw_parse_tree))
{
PushActiveSnapshot(GetTransactionSnapshot());
snapshot_set = true;
}
/*
* Analyze and rewrite the query. Note that the originally specified
* parameter set is not required to be complete, so we have to use
* parse_analyze_varparams().
*/
if (log_parser_stats)
ResetUsage();
query = parse_analyze_varparams(raw_parse_tree,
query_string,
¶mTypes,
&numParams);
/*
* Check all parameter types got determined.
*/
for (i = 0; i < numParams; i++)
{
Oid ptype = paramTypes[i];
if (ptype == InvalidOid || ptype == UNKNOWNOID)
ereport(ERROR,
(errcode(ERRCODE_INDETERMINATE_DATATYPE),
errmsg("could not determine data type of parameter $%d",
i + 1)));
}
if (log_parser_stats)
ShowUsage("PARSE ANALYSIS STATISTICS");
querytree_list = pg_rewrite_query(query);
/* Done with the snapshot used for parsing */
if (snapshot_set)
PopActiveSnapshot();
}
else
{
/* Empty input string. This is legal. */
raw_parse_tree = NULL;
commandTag = NULL;
psrc = CreateCachedPlan(raw_parse_tree, query_string, commandTag);
querytree_list = NIL;
}
/*
* CachedPlanSource must be a direct child of MessageContext before we
* reparent unnamed_stmt_context under it, else we have a disconnected
* circular subgraph. Klugy, but less so than flipping contexts even more
* above.
*/
if (unnamed_stmt_context)
MemoryContextSetParent(psrc->context, MessageContext);
/* Finish filling in the CachedPlanSource */
CompleteCachedPlan(psrc,
querytree_list,
unnamed_stmt_context,
paramTypes,
numParams,
NULL,
NULL,
0, /* default cursor options */
true); /* fixed result */
/* If we got a cancel signal during analysis, quit */
CHECK_FOR_INTERRUPTS();
if (is_named)
{
/*
* Store the query as a prepared statement.
*/
StorePreparedStatement(stmt_name, psrc, false);
}
else
{
/*
* We just save the CachedPlanSource into unnamed_stmt_psrc.
*/
SaveCachedPlan(psrc);
unnamed_stmt_psrc = psrc;
}
MemoryContextSwitchTo(oldcontext);
/*
* We do NOT close the open transaction command here; that only happens
* when the client sends Sync. Instead, do CommandCounterIncrement just
* in case something happened during parse/plan.
*/
CommandCounterIncrement();
/*
* Send ParseComplete.
*/
if (whereToSendOutput == DestRemote)
pq_putemptymessage('1');
/*
* Emit duration logging if appropriate.
*/
switch (check_log_duration(msec_str, false))
{
case 1:
ereport(LOG,
(errmsg("duration: %s ms", msec_str),
errhidestmt(true)));
break;
case 2:
ereport(LOG,
(errmsg("duration: %s ms parse %s: %s",
msec_str,
*stmt_name ? stmt_name : "<unnamed>",
query_string),
errhidestmt(true)));
break;
}
if (save_log_statement_stats)
ShowUsage("PARSE MESSAGE STATISTICS");
debug_query_string = NULL;
}
| static void exec_simple_query | ( | const char * | query_string | ) | [static] |
Definition at line 828 of file postgres.c.
References analyze_requires_snapshot(), BeginCommand(), CHECK_FOR_INTERRUPTS, check_log_duration(), check_log_statement(), CommandCounterIncrement(), CreateCommandTag(), CreateDestReceiver(), CreatePortal(), CURSOR_OPT_BINARY, PortalData::cursorOptions, debug_query_string, DestRemote, drop_unnamed_stmt(), EndCommand(), ereport, errcode(), errdetail_abort(), errdetail_execute(), errhidestmt(), errmsg(), ERROR, FETCH_ALL, finish_xact_command(), format, GetPortalByName(), GetTransactionSnapshot(), InvalidSnapshot, IsA, IsAbortedTransactionBlockState(), FetchStmt::ismove, IsTransactionExitStmt(), lfirst, list_length(), lnext, LOG, log_statement_stats, MemoryContextSwitchTo(), MessageContext, NULL, NullCommand(), pg_analyze_and_rewrite(), pg_parse_query(), pg_plan_queries(), pgstat_report_activity(), PopActiveSnapshot(), PortalDefineQuery(), PortalDrop(), PortalIsValid, FetchStmt::portalname, PortalRun(), PortalSetResultFormat(), PortalStart(), PushActiveSnapshot(), _DestReceiver::rDestroy, ResetUsage(), set_ps_display(), SetRemoteDestReceiverParams(), ShowUsage(), start_xact_command(), STATE_RUNNING, PortalData::visible, and whereToSendOutput.
Referenced by PostgresMain().
{
CommandDest dest = whereToSendOutput;
MemoryContext oldcontext;
List *parsetree_list;
ListCell *parsetree_item;
bool save_log_statement_stats = log_statement_stats;
bool was_logged = false;
bool isTopLevel;
char msec_str[32];
/*
* Report query to various monitoring facilities.
*/
debug_query_string = query_string;
pgstat_report_activity(STATE_RUNNING, query_string);
TRACE_POSTGRESQL_QUERY_START(query_string);
/*
* We use save_log_statement_stats so ShowUsage doesn't report incorrect
* results because ResetUsage wasn't called.
*/
if (save_log_statement_stats)
ResetUsage();
/*
* Start up a transaction command. All queries generated by the
* query_string will be in this same command block, *unless* we find a
* BEGIN/COMMIT/ABORT statement; we have to force a new xact command after
* one of those, else bad things will happen in xact.c. (Note that this
* will normally change current memory context.)
*/
start_xact_command();
/*
* Zap any pre-existing unnamed statement. (While not strictly necessary,
* it seems best to define simple-Query mode as if it used the unnamed
* statement and portal; this ensures we recover any storage used by prior
* unnamed operations.)
*/
drop_unnamed_stmt();
/*
* Switch to appropriate context for constructing parsetrees.
*/
oldcontext = MemoryContextSwitchTo(MessageContext);
/*
* Do basic parsing of the query or queries (this should be safe even if
* we are in aborted transaction state!)
*/
parsetree_list = pg_parse_query(query_string);
/* Log immediately if dictated by log_statement */
if (check_log_statement(parsetree_list))
{
ereport(LOG,
(errmsg("statement: %s", query_string),
errhidestmt(true),
errdetail_execute(parsetree_list)));
was_logged = true;
}
/*
* Switch back to transaction context to enter the loop.
*/
MemoryContextSwitchTo(oldcontext);
/*
* We'll tell PortalRun it's a top-level command iff there's exactly one
* raw parsetree. If more than one, it's effectively a transaction block
* and we want PreventTransactionChain to reject unsafe commands. (Note:
* we're assuming that query rewrite cannot add commands that are
* significant to PreventTransactionChain.)
*/
isTopLevel = (list_length(parsetree_list) == 1);
/*
* Run through the raw parsetree(s) and process each one.
*/
foreach(parsetree_item, parsetree_list)
{
Node *parsetree = (Node *) lfirst(parsetree_item);
bool snapshot_set = false;
const char *commandTag;
char completionTag[COMPLETION_TAG_BUFSIZE];
List *querytree_list,
*plantree_list;
Portal portal;
DestReceiver *receiver;
int16 format;
/*
* Get the command name for use in status display (it also becomes the
* default completion tag, down inside PortalRun). Set ps_status and
* do any special start-of-SQL-command processing needed by the
* destination.
*/
commandTag = CreateCommandTag(parsetree);
set_ps_display(commandTag, false);
BeginCommand(commandTag, dest);
/*
* If we are in an aborted transaction, reject all commands except
* COMMIT/ABORT. It is important that this test occur before we try
* to do parse analysis, rewrite, or planning, since all those phases
* try to do database accesses, which may fail in abort state. (It
* might be safe to allow some additional utility commands in this
* state, but not many...)
*/
if (IsAbortedTransactionBlockState() &&
!IsTransactionExitStmt(parsetree))
ereport(ERROR,
(errcode(ERRCODE_IN_FAILED_SQL_TRANSACTION),
errmsg("current transaction is aborted, "
"commands ignored until end of transaction block"),
errdetail_abort()));
/* Make sure we are in a transaction command */
start_xact_command();
/* If we got a cancel signal in parsing or prior command, quit */
CHECK_FOR_INTERRUPTS();
/*
* Set up a snapshot if parse analysis/planning will need one.
*/
if (analyze_requires_snapshot(parsetree))
{
PushActiveSnapshot(GetTransactionSnapshot());
snapshot_set = true;
}
/*
* OK to analyze, rewrite, and plan this query.
*
* Switch to appropriate context for constructing querytrees (again,
* these must outlive the execution context).
*/
oldcontext = MemoryContextSwitchTo(MessageContext);
querytree_list = pg_analyze_and_rewrite(parsetree, query_string,
NULL, 0);
plantree_list = pg_plan_queries(querytree_list, 0, NULL);
/* Done with the snapshot used for parsing/planning */
if (snapshot_set)
PopActiveSnapshot();
/* If we got a cancel signal in analysis or planning, quit */
CHECK_FOR_INTERRUPTS();
/*
* Create unnamed portal to run the query or queries in. If there
* already is one, silently drop it.
*/
portal = CreatePortal("", true, true);
/* Don't display the portal in pg_cursors */
portal->visible = false;
/*
* We don't have to copy anything into the portal, because everything
* we are passing here is in MessageContext, which will outlive the
* portal anyway.
*/
PortalDefineQuery(portal,
NULL,
query_string,
commandTag,
plantree_list,
NULL);
/*
* Start the portal. No parameters here.
*/
PortalStart(portal, NULL, 0, InvalidSnapshot);
/*
* Select the appropriate output format: text unless we are doing a
* FETCH from a binary cursor. (Pretty grotty to have to do this here
* --- but it avoids grottiness in other places. Ah, the joys of
* backward compatibility...)
*/
format = 0; /* TEXT is default */
if (IsA(parsetree, FetchStmt))
{
FetchStmt *stmt = (FetchStmt *) parsetree;
if (!stmt->ismove)
{
Portal fportal = GetPortalByName(stmt->portalname);
if (PortalIsValid(fportal) &&
(fportal->cursorOptions & CURSOR_OPT_BINARY))
format = 1; /* BINARY */
}
}
PortalSetResultFormat(portal, 1, &format);
/*
* Now we can create the destination receiver object.
*/
receiver = CreateDestReceiver(dest);
if (dest == DestRemote)
SetRemoteDestReceiverParams(receiver, portal);
/*
* Switch back to transaction context for execution.
*/
MemoryContextSwitchTo(oldcontext);
/*
* Run the portal to completion, and then drop it (and the receiver).
*/
(void) PortalRun(portal,
FETCH_ALL,
isTopLevel,
receiver,
receiver,
completionTag);
(*receiver->rDestroy) (receiver);
PortalDrop(portal, false);
if (IsA(parsetree, TransactionStmt))
{
/*
* If this was a transaction control statement, commit it. We will
* start a new xact command for the next command (if any).
*/
finish_xact_command();
}
else if (lnext(parsetree_item) == NULL)
{
/*
* If this is the last parsetree of the query string, close down
* transaction statement before reporting command-complete. This
* is so that any end-of-transaction errors are reported before
* the command-complete message is issued, to avoid confusing
* clients who will expect either a command-complete message or an
* error, not one and then the other. But for compatibility with
* historical Postgres behavior, we do not force a transaction
* boundary between queries appearing in a single query string.
*/
finish_xact_command();
}
else
{
/*
* We need a CommandCounterIncrement after every query, except
* those that start or end a transaction block.
*/
CommandCounterIncrement();
}
/*
* Tell client that we're done with this query. Note we emit exactly
* one EndCommand report for each raw parsetree, thus one for each SQL
* command the client sent, regardless of rewriting. (But a command
* aborted by error will not send an EndCommand report at all.)
*/
EndCommand(completionTag, dest);
} /* end loop over parsetrees */
/*
* Close down transaction statement, if one is open.
*/
finish_xact_command();
/*
* If there were no parsetrees, return EmptyQueryResponse message.
*/
if (!parsetree_list)
NullCommand(dest);
/*
* Emit duration logging if appropriate.
*/
switch (check_log_duration(msec_str, was_logged))
{
case 1:
ereport(LOG,
(errmsg("duration: %s ms", msec_str),
errhidestmt(true)));
break;
case 2:
ereport(LOG,
(errmsg("duration: %s ms statement: %s",
msec_str, query_string),
errhidestmt(true),
errdetail_execute(parsetree_list)));
break;
}
if (save_log_statement_stats)
ShowUsage("QUERY STATISTICS");
TRACE_POSTGRESQL_QUERY_DONE(query_string);
debug_query_string = NULL;
}
| static void finish_xact_command | ( | void | ) | [static] |
Definition at line 2400 of file postgres.c.
References CommitTransactionCommand(), DEBUG3, disable_timeout(), ereport, errmsg_internal(), MemoryContextStats(), STATEMENT_TIMEOUT, TopMemoryContext, and xact_started.
Referenced by exec_execute_message(), exec_simple_query(), and PostgresMain().
{
if (xact_started)
{
/* Cancel any active statement timeout before committing */
disable_timeout(STATEMENT_TIMEOUT, false);
/* Now commit the command */
ereport(DEBUG3,
(errmsg_internal("CommitTransactionCommand")));
CommitTransactionCommand();
#ifdef MEMORY_CONTEXT_CHECKING
/* Check all memory contexts that weren't freed during commit */
/* (those that were, were checked before being deleted) */
MemoryContextCheck(TopMemoryContext);
#endif
#ifdef SHOW_MEMORY_STATS
/* Print mem stats after each commit for leak tracking */
MemoryContextStats(TopMemoryContext);
#endif
xact_started = false;
}
}
| void FloatExceptionHandler | ( | SIGNAL_ARGS | ) |
Definition at line 2655 of file postgres.c.
References ereport, errcode(), errdetail(), errmsg(), and ERROR.
Referenced by AutoVacLauncherMain(), AutoVacWorkerMain(), do_start_bgworker(), plperl_init_interp(), and PostgresMain().
{
/* We're not returning, so no need to save errno */
ereport(ERROR,
(errcode(ERRCODE_FLOATING_POINT_EXCEPTION),
errmsg("floating-point exception"),
errdetail("An invalid floating-point operation was signaled. "
"This probably means an out-of-range result or an "
"invalid operation, such as division by zero.")));
}
| static void forbidden_in_wal_sender | ( | char | firstchar | ) | [static] |
Definition at line 4237 of file postgres.c.
References am_walsender, ereport, errcode(), errmsg(), and ERROR.
Referenced by PostgresMain().
{
if (am_walsender)
{
if (firstchar == 'F')
ereport(ERROR,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("fastpath function calls not supported in a replication connection")));
else
ereport(ERROR,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("extended query protocol not supported in a replication connection")));
}
}
| long get_stack_depth_rlimit | ( | void | ) |
Definition at line 4259 of file postgres.c.
References val.
Referenced by check_max_stack_depth(), and InitializeGUCOptionsFromEnvironment().
{
#if defined(HAVE_GETRLIMIT) && defined(RLIMIT_STACK)
static long val = 0;
/* This won't change after process launch, so check just once */
if (val == 0)
{
struct rlimit rlim;
if (getrlimit(RLIMIT_STACK, &rlim) < 0)
val = -1;
else if (rlim.rlim_cur == RLIM_INFINITY)
val = LONG_MAX;
/* rlim_cur is probably of an unsigned type, so check for overflow */
else if (rlim.rlim_cur >= LONG_MAX)
val = LONG_MAX;
else
val = rlim.rlim_cur;
}
return val;
#else /* no getrlimit */
#if defined(WIN32) || defined(__CYGWIN__)
/* On Windows we set the backend stack size in src/backend/Makefile */
return WIN32_STACK_RLIMIT;
#else /* not windows ... give up */
return -1;
#endif
#endif
}
| const char* get_stats_option_name | ( | const char * | arg | ) |
Definition at line 3215 of file postgres.c.
References optarg.
Referenced by PostmasterMain(), and process_postgres_switches().
| static int interactive_getc | ( | void | ) | [static] |
Definition at line 318 of file postgres.c.
References client_read_ended(), and prepare_for_client_read().
Referenced by InteractiveBackend().
{
int c;
prepare_for_client_read();
c = getc(stdin);
client_read_ended();
return c;
}
| static int InteractiveBackend | ( | StringInfo | inBuf | ) | [static] |
Definition at line 228 of file postgres.c.
References appendStringInfoChar(), StringInfoData::data, EchoQuery, end, interactive_getc(), StringInfoData::len, resetStringInfo(), and UseNewLine.
Referenced by ReadCommand().
{
int c; /* character read from getc() */
bool end = false; /* end-of-input flag */
bool backslashSeen = false; /* have we seen a \ ? */
/*
* display a prompt and obtain input from the user
*/
printf("backend> ");
fflush(stdout);
resetStringInfo(inBuf);
if (UseNewLine)
{
/*
* if we are using \n as a delimiter, then read characters until the
* \n.
*/
while ((c = interactive_getc()) != EOF)
{
if (c == '\n')
{
if (backslashSeen)
{
/* discard backslash from inBuf */
inBuf->data[--inBuf->len] = '\0';
backslashSeen = false;
continue;
}
else
{
/* keep the newline character */
appendStringInfoChar(inBuf, '\n');
break;
}
}
else if (c == '\\')
backslashSeen = true;
else
backslashSeen = false;
appendStringInfoChar(inBuf, (char) c);
}
if (c == EOF)
end = true;
}
else
{
/*
* otherwise read characters until EOF.
*/
while ((c = interactive_getc()) != EOF)
appendStringInfoChar(inBuf, (char) c);
/* No input before EOF signal means time to quit. */
if (inBuf->len == 0)
end = true;
}
if (end)
return EOF;
/*
* otherwise we have a user query so process it.
*/
/* Add '\0' to make it look the same as message case. */
appendStringInfoChar(inBuf, (char) '\0');
/*
* if the query echo flag was given, print the query..
*/
if (EchoQuery)
printf("statement: %s\n", inBuf->data);
fflush(stdout);
return 'Q';
}
Definition at line 2436 of file postgres.c.
References IsA, TransactionStmt::kind, TRANS_STMT_COMMIT, TRANS_STMT_PREPARE, TRANS_STMT_ROLLBACK, and TRANS_STMT_ROLLBACK_TO.
Referenced by exec_bind_message(), exec_parse_message(), exec_simple_query(), and IsTransactionExitStmtList().
{
if (parsetree && IsA(parsetree, TransactionStmt))
{
TransactionStmt *stmt = (TransactionStmt *) parsetree;
if (stmt->kind == TRANS_STMT_COMMIT ||
stmt->kind == TRANS_STMT_PREPARE ||
stmt->kind == TRANS_STMT_ROLLBACK ||
stmt->kind == TRANS_STMT_ROLLBACK_TO)
return true;
}
return false;
}
Definition at line 2453 of file postgres.c.
References CMD_UTILITY, Query::commandType, IsA, IsTransactionExitStmt(), linitial, list_length(), and Query::utilityStmt.
Referenced by exec_execute_message().
{
if (list_length(parseTrees) == 1)
{
Node *stmt = (Node *) linitial(parseTrees);
if (IsA(stmt, Query))
{
Query *query = (Query *) stmt;
if (query->commandType == CMD_UTILITY &&
IsTransactionExitStmt(query->utilityStmt))
return true;
}
else if (IsTransactionExitStmt(stmt))
return true;
}
return false;
}
Definition at line 2475 of file postgres.c.
References CMD_UTILITY, Query::commandType, IsA, linitial, list_length(), and Query::utilityStmt.
Referenced by exec_execute_message().
{
if (list_length(parseTrees) == 1)
{
Node *stmt = (Node *) linitial(parseTrees);
if (IsA(stmt, Query))
{
Query *query = (Query *) stmt;
if (query->commandType == CMD_UTILITY &&
IsA(query->utilityStmt, TransactionStmt))
return true;
}
else if (IsA(stmt, TransactionStmt))
return true;
}
return false;
}
| static void log_disconnections | ( | int | code, | |
| Datum | arg | |||
| ) | [static] |
Definition at line 4397 of file postgres.c.
References Port::database_name, ereport, errmsg(), GetCurrentTimestamp(), LOG, MyProcPort, port, Port::remote_host, Port::remote_port, Port::SessionStartTime, TimestampDifference(), and Port::user_name.
Referenced by PostgresMain().
{
Port *port = MyProcPort;
long secs;
int usecs;
int msecs;
int hours,
minutes,
seconds;
TimestampDifference(port->SessionStartTime,
GetCurrentTimestamp(),
&secs, &usecs);
msecs = usecs / 1000;
hours = secs / SECS_PER_HOUR;
secs %= SECS_PER_HOUR;
minutes = secs / SECS_PER_MINUTE;
seconds = secs % SECS_PER_MINUTE;
ereport(LOG,
(errmsg("disconnection: session time: %d:%02d:%02d.%03d "
"user=%s database=%s host=%s%s%s",
hours, minutes, seconds, msecs,
port->user_name, port->database_name, port->remote_host,
port->remote_port[0] ? " port=" : "", port->remote_port)));
}
| List* pg_analyze_and_rewrite | ( | Node * | parsetree, | |
| const char * | query_string, | |||
| Oid * | paramTypes, | |||
| int | numParams | |||
| ) |
Definition at line 599 of file postgres.c.
References log_parser_stats, parse_analyze(), pg_rewrite_query(), ResetUsage(), and ShowUsage().
Referenced by _SPI_execute_plan(), _SPI_prepare_plan(), BeginCopy(), exec_simple_query(), execute_sql_string(), and RevalidateCachedQuery().
{
Query *query;
List *querytree_list;
TRACE_POSTGRESQL_QUERY_REWRITE_START(query_string);
/*
* (1) Perform parse analysis.
*/
if (log_parser_stats)
ResetUsage();
query = parse_analyze(parsetree, query_string, paramTypes, numParams);
if (log_parser_stats)
ShowUsage("PARSE ANALYSIS STATISTICS");
/*
* (2) Rewrite the queries, as necessary
*/
querytree_list = pg_rewrite_query(query);
TRACE_POSTGRESQL_QUERY_REWRITE_DONE(query_string);
return querytree_list;
}
| List* pg_analyze_and_rewrite_params | ( | Node * | parsetree, | |
| const char * | query_string, | |||
| ParserSetupHook | parserSetup, | |||
| void * | parserSetupArg | |||
| ) |
Definition at line 634 of file postgres.c.
References Assert, free_parsestate(), log_parser_stats, make_parsestate(), NULL, ParseState::p_sourcetext, pg_rewrite_query(), post_parse_analyze_hook, ResetUsage(), ShowUsage(), and transformTopLevelStmt().
Referenced by _SPI_execute_plan(), _SPI_prepare_plan(), fmgr_sql_validator(), init_sql_fcache(), inline_set_returning_function(), and RevalidateCachedQuery().
{
ParseState *pstate;
Query *query;
List *querytree_list;
Assert(query_string != NULL); /* required as of 8.4 */
TRACE_POSTGRESQL_QUERY_REWRITE_START(query_string);
/*
* (1) Perform parse analysis.
*/
if (log_parser_stats)
ResetUsage();
pstate = make_parsestate(NULL);
pstate->p_sourcetext = query_string;
(*parserSetup) (pstate, parserSetupArg);
query = transformTopLevelStmt(pstate, parsetree);
if (post_parse_analyze_hook)
(*post_parse_analyze_hook) (pstate, query);
free_parsestate(pstate);
if (log_parser_stats)
ShowUsage("PARSE ANALYSIS STATISTICS");
/*
* (2) Rewrite the queries, as necessary
*/
querytree_list = pg_rewrite_query(query);
TRACE_POSTGRESQL_QUERY_REWRITE_DONE(query_string);
return querytree_list;
}
| List* pg_parse_query | ( | const char * | query_string | ) |
Definition at line 557 of file postgres.c.
References copyObject(), elog, equal(), log_parser_stats, new_list(), raw_parser(), ResetUsage(), ShowUsage(), and WARNING.
Referenced by _SPI_prepare_oneshot_plan(), _SPI_prepare_plan(), exec_parse_message(), exec_simple_query(), execute_sql_string(), fmgr_sql_validator(), init_sql_fcache(), inline_function(), and inline_set_returning_function().
{
List *raw_parsetree_list;
TRACE_POSTGRESQL_QUERY_PARSE_START(query_string);
if (log_parser_stats)
ResetUsage();
raw_parsetree_list = raw_parser(query_string);
if (log_parser_stats)
ShowUsage("PARSER STATISTICS");
#ifdef COPY_PARSE_PLAN_TREES
/* Optional debugging check: pass raw parsetrees through copyObject() */
{
List *new_list = (List *) copyObject(raw_parsetree_list);
/* This checks both copyObject() and the equal() routines... */
if (!equal(new_list, raw_parsetree_list))
elog(WARNING, "copyObject() failed to produce an equal raw parse tree");
else
raw_parsetree_list = new_list;
}
#endif
TRACE_POSTGRESQL_QUERY_PARSE_DONE(query_string);
return raw_parsetree_list;
}
| List* pg_plan_queries | ( | List * | querytrees, | |
| int | cursorOptions, | |||
| ParamListInfo | boundParams | |||
| ) |
Definition at line 795 of file postgres.c.
References CMD_UTILITY, Query::commandType, lappend(), lfirst, pg_plan_query(), and Query::utilityStmt.
Referenced by BuildCachedPlan(), exec_simple_query(), and execute_sql_string().
{
List *stmt_list = NIL;
ListCell *query_list;
foreach(query_list, querytrees)
{
Query *query = (Query *) lfirst(query_list);
Node *stmt;
if (query->commandType == CMD_UTILITY)
{
/* Utility commands have no plans. */
stmt = query->utilityStmt;
}
else
{
stmt = (Node *) pg_plan_query(query, cursorOptions, boundParams);
}
stmt_list = lappend(stmt_list, stmt);
}
return stmt_list;
}
| PlannedStmt* pg_plan_query | ( | Query * | querytree, | |
| int | cursorOptions, | |||
| ParamListInfo | boundParams | |||
| ) |
Definition at line 736 of file postgres.c.
References ActiveSnapshotSet(), Assert, CMD_UTILITY, Query::commandType, copyObject(), Debug_pretty_print, Debug_print_plan, elog, elog_node_display(), equal(), LOG, log_planner_stats, planner(), ResetUsage(), ShowUsage(), and WARNING.
Referenced by ExecCreateTableAs(), ExplainOneQuery(), init_execution_state(), pg_plan_queries(), and refresh_matview_datafill().
{
PlannedStmt *plan;
/* Utility commands have no plans. */
if (querytree->commandType == CMD_UTILITY)
return NULL;
/* Planner must have a snapshot in case it calls user-defined functions. */
Assert(ActiveSnapshotSet());
TRACE_POSTGRESQL_QUERY_PLAN_START();
if (log_planner_stats)
ResetUsage();
/* call the optimizer */
plan = planner(querytree, cursorOptions, boundParams);
if (log_planner_stats)
ShowUsage("PLANNER STATISTICS");
#ifdef COPY_PARSE_PLAN_TREES
/* Optional debugging check: pass plan output through copyObject() */
{
PlannedStmt *new_plan = (PlannedStmt *) copyObject(plan);
/*
* equal() currently does not have routines to compare Plan nodes, so
* don't try to test equality here. Perhaps fix someday?
*/
#ifdef NOT_USED
/* This checks both copyObject() and the equal() routines... */
if (!equal(new_plan, plan))
elog(WARNING, "copyObject() failed to produce an equal plan tree");
else
#endif
plan = new_plan;
}
#endif
/*
* Print plan if debugging.
*/
if (Debug_print_plan)
elog_node_display(LOG, "plan", plan, Debug_pretty_print);
TRACE_POSTGRESQL_QUERY_PLAN_DONE();
return plan;
}
Definition at line 684 of file postgres.c.
References CMD_UTILITY, Query::commandType, copyObject(), Debug_pretty_print, Debug_print_parse, Debug_print_rewritten, elog, elog_node_display(), equal(), list_make1, LOG, log_parser_stats, QueryRewrite(), ResetUsage(), ShowUsage(), and WARNING.
Referenced by exec_parse_message(), pg_analyze_and_rewrite(), and pg_analyze_and_rewrite_params().
{
List *querytree_list;
if (Debug_print_parse)
elog_node_display(LOG, "parse tree", query,
Debug_pretty_print);
if (log_parser_stats)
ResetUsage();
if (query->commandType == CMD_UTILITY)
{
/* don't rewrite utilities, just dump 'em into result list */
querytree_list = list_make1(query);
}
else
{
/* rewrite regular queries */
querytree_list = QueryRewrite(query);
}
if (log_parser_stats)
ShowUsage("REWRITER STATISTICS");
#ifdef COPY_PARSE_PLAN_TREES
/* Optional debugging check: pass querytree output through copyObject() */
{
List *new_list;
new_list = (List *) copyObject(querytree_list);
/* This checks both copyObject() and the equal() routines... */
if (!equal(new_list, querytree_list))
elog(WARNING, "copyObject() failed to produce equal parse tree");
else
querytree_list = new_list;
}
#endif
if (Debug_print_rewritten)
elog_node_display(LOG, "rewritten parse tree", querytree_list,
Debug_pretty_print);
return querytree_list;
}
| void PostgresMain | ( | int | argc, | |
| char * | argv[], | |||
| const char * | dbname, | |||
| const char * | username | |||
| ) |
Definition at line 3518 of file postgres.c.
References AbortCurrentTransaction(), ALLOCSET_DEFAULT_INITSIZE, ALLOCSET_DEFAULT_MAXSIZE, ALLOCSET_DEFAULT_MINSIZE, AllocSetContextCreate(), am_walsender, Assert, BaseInit(), BeginReportingGUCOptions(), BlockSig, buf, ChangeToDataDir(), CreateDataDirLockFile(), DataDir, debug_query_string, DestDebug, DestRemote, die(), disable_all_timeouts(), DisableCatchupInterrupt(), DisableNotifyInterrupt(), doing_extended_query_message, DoingCommandRead, drop_unnamed_stmt(), DropPreparedStatement(), elog, EmitErrorReport(), ereport, errcode(), errmsg(), ERROR, error_context_stack, exec_bind_message(), exec_describe_portal_message(), exec_describe_statement_message(), exec_execute_message(), exec_parse_message(), exec_replication_command(), exec_simple_query(), FATAL, find_my_exec(), finish_xact_command(), FloatExceptionHandler(), FlushErrorState(), forbidden_in_wal_sender(), FrontendProtocol, get_pkglib_path(), GetCurrentTimestamp(), GetPortalByName(), got_SIGHUP, HandleFunctionRequest(), HOLD_INTERRUPTS, i, ignore_till_sync, InitializeGUCOptions(), InitializeMaxBackends(), InitializeTimeouts(), InitPostgres(), InitProcess(), InitProcessing, initStringInfo(), InitWalSender(), InvalidOid, IsAbortedTransactionBlockState(), IsTransactionOrTransactionBlock(), IsUnderPostmaster, log_disconnections(), Log_disconnections, MemoryContextDelete(), MemoryContextInit(), MemoryContextResetAndDeleteChildren(), MemoryContextSwitchTo(), MessageContext, my_exec_path, MyCancelKey, MyProcPid, MyStartTime, NormalProcessing, NULL, on_proc_exit(), palloc(), PG_exception_stack, PG_PROTOCOL_MAJOR, PG_SETMASK, PGC_POSTMASTER, PGC_SIGHUP, PgStartTime, pgstat_report_activity(), pgstat_report_stat(), pkglib_path, PortalDrop(), PortalIsValid, PostmasterContext, pq_beginmessage(), pq_comm_reset(), pq_endmessage(), pq_flush(), pq_getmsgbyte(), pq_getmsgend(), pq_getmsgint(), pq_getmsgstring(), pq_putemptymessage(), pq_sendint(), pqinitmask(), pqsignal(), proc_exit(), process_local_preload_libraries(), process_postgres_switches(), ProcessCompletedNotifies(), ProcessConfigFile(), procsignal_sigusr1_handler(), progname, QueryCancelPending, quickdie(), ReadCommand(), ReadyForQuery(), RESUME_INTERRUPTS, SelectConfigFiles(), set_ps_display(), SetCurrentStatementStartTimestamp(), SetProcessingMode, SIG_DFL, SIG_IGN, SIGCHLD, sigdelset, SIGHUP, SigHupHandler(), sigjmp_buf, SIGPIPE, SIGQUIT, sigsetjmp, SIGUSR1, SIGUSR2, start_xact_command(), STATE_FASTPATH, STATE_IDLE, STATE_IDLEINTRANSACTION, STATE_IDLEINTRANSACTION_ABORTED, StatementCancelHandler(), TopMemoryContext, UnBlockSig, userDoption, ValidatePgVersion(), WalSndErrorCleanup(), WalSndSignals(), whereToSendOutput, and xact_started.
Referenced by BackendRun(), and main().
{
int firstchar;
StringInfoData input_message;
sigjmp_buf local_sigjmp_buf;
volatile bool send_ready_for_query = true;
/*
* Initialize globals (already done if under postmaster, but not if
* standalone).
*/
if (!IsUnderPostmaster)
{
MyProcPid = getpid();
MyStartTime = time(NULL);
}
/*
* Fire up essential subsystems: error and memory management
*
* If we are running under the postmaster, this is done already.
*/
if (!IsUnderPostmaster)
MemoryContextInit();
SetProcessingMode(InitProcessing);
/* Compute paths, if we didn't inherit them from postmaster */
if (my_exec_path[0] == '\0')
{
if (find_my_exec(argv[0], my_exec_path) < 0)
elog(FATAL, "%s: could not locate my own executable path",
argv[0]);
}
if (pkglib_path[0] == '\0')
get_pkglib_path(my_exec_path, pkglib_path);
/*
* Set default values for command-line options.
*/
if (!IsUnderPostmaster)
InitializeGUCOptions();
/*
* Parse command-line options.
*/
process_postgres_switches(argc, argv, PGC_POSTMASTER, &dbname);
/* Must have gotten a database name, or have a default (the username) */
if (dbname == NULL)
{
dbname = username;
if (dbname == NULL)
ereport(FATAL,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("%s: no database nor user name specified",
progname)));
}
/* Acquire configuration parameters, unless inherited from postmaster */
if (!IsUnderPostmaster)
{
if (!SelectConfigFiles(userDoption, progname))
proc_exit(1);
}
/*
* You might expect to see a setsid() call here, but it's not needed,
* because if we are under a postmaster then BackendInitialize() did it.
*/
/*
* Set up signal handlers and masks.
*
* Note that postmaster blocked all signals before forking child process,
* so there is no race condition whereby we might receive a signal before
* we have set up the handler.
*
* Also note: it's best not to use any signals that are SIG_IGNored in the
* postmaster. If such a signal arrives before we are able to change the
* handler to non-SIG_IGN, it'll get dropped. Instead, make a dummy
* handler in the postmaster to reserve the signal. (Of course, this isn't
* an issue for signals that are locally generated, such as SIGALRM and
* SIGPIPE.)
*/
if (am_walsender)
WalSndSignals();
else
{
pqsignal(SIGHUP, SigHupHandler); /* set flag to read config
* file */
pqsignal(SIGINT, StatementCancelHandler); /* cancel current query */
pqsignal(SIGTERM, die); /* cancel current query and exit */
/*
* In a standalone backend, SIGQUIT can be generated from the keyboard
* easily, while SIGTERM cannot, so we make both signals do die()
* rather than quickdie().
*/
if (IsUnderPostmaster)
pqsignal(SIGQUIT, quickdie); /* hard crash time */
else
pqsignal(SIGQUIT, die); /* cancel current query and exit */
InitializeTimeouts(); /* establishes SIGALRM handler */
/*
* Ignore failure to write to frontend. Note: if frontend closes
* connection, we will notice it and exit cleanly when control next
* returns to outer loop. This seems safer than forcing exit in the
* midst of output during who-knows-what operation...
*/
pqsignal(SIGPIPE, SIG_IGN);
pqsignal(SIGUSR1, procsignal_sigusr1_handler);
pqsignal(SIGUSR2, SIG_IGN);
pqsignal(SIGFPE, FloatExceptionHandler);
/*
* Reset some signals that are accepted by postmaster but not by
* backend
*/
pqsignal(SIGCHLD, SIG_DFL); /* system() requires this on some
* platforms */
}
pqinitmask();
if (IsUnderPostmaster)
{
/* We allow SIGQUIT (quickdie) at all times */
sigdelset(&BlockSig, SIGQUIT);
}
PG_SETMASK(&BlockSig); /* block everything except SIGQUIT */
if (!IsUnderPostmaster)
{
/*
* Validate we have been given a reasonable-looking DataDir (if under
* postmaster, assume postmaster did this already).
*/
Assert(DataDir);
ValidatePgVersion(DataDir);
/* Change into DataDir (if under postmaster, was done already) */
ChangeToDataDir();
/*
* Create lockfile for data directory.
*/
CreateDataDirLockFile(false);
/* Initialize MaxBackends (if under postmaster, was done already) */
InitializeMaxBackends();
}
/* Early initialization */
BaseInit();
/*
* Create a per-backend PGPROC struct in shared memory, except in the
* EXEC_BACKEND case where this was done in SubPostmasterMain. We must do
* this before we can use LWLocks (and in the EXEC_BACKEND case we already
* had to do some stuff with LWLocks).
*/
#ifdef EXEC_BACKEND
if (!IsUnderPostmaster)
InitProcess();
#else
InitProcess();
#endif
/* We need to allow SIGINT, etc during the initial transaction */
PG_SETMASK(&UnBlockSig);
/*
* General initialization.
*
* NOTE: if you are tempted to add code in this vicinity, consider putting
* it inside InitPostgres() instead. In particular, anything that
* involves database access should be there, not here.
*/
InitPostgres(dbname, InvalidOid, username, NULL);
/*
* If the PostmasterContext is still around, recycle the space; we don't
* need it anymore after InitPostgres completes. Note this does not trash
* *MyProcPort, because ConnCreate() allocated that space with malloc()
* ... else we'd need to copy the Port data first. Also, subsidiary data
* such as the username isn't lost either; see ProcessStartupPacket().
*/
if (PostmasterContext)
{
MemoryContextDelete(PostmasterContext);
PostmasterContext = NULL;
}
SetProcessingMode(NormalProcessing);
/*
* Now all GUC states are fully set up. Report them to client if
* appropriate.
*/
BeginReportingGUCOptions();
/*
* Also set up handler to log session end; we have to wait till now to be
* sure Log_disconnections has its final value.
*/
if (IsUnderPostmaster && Log_disconnections)
on_proc_exit(log_disconnections, 0);
/* Perform initialization specific to a WAL sender process. */
if (am_walsender)
InitWalSender();
/*
* process any libraries that should be preloaded at backend start (this
* likewise can't be done until GUC settings are complete)
*/
process_local_preload_libraries();
/*
* Send this backend's cancellation info to the frontend.
*/
if (whereToSendOutput == DestRemote &&
PG_PROTOCOL_MAJOR(FrontendProtocol) >= 2)
{
StringInfoData buf;
pq_beginmessage(&buf, 'K');
pq_sendint(&buf, (int32) MyProcPid, sizeof(int32));
pq_sendint(&buf, (int32) MyCancelKey, sizeof(int32));
pq_endmessage(&buf);
/* Need not flush since ReadyForQuery will do it. */
}
/* Welcome banner for standalone case */
if (whereToSendOutput == DestDebug)
printf("\nPostgreSQL stand-alone backend %s\n", PG_VERSION);
/*
* Create the memory context we will use in the main loop.
*
* MessageContext is reset once per iteration of the main loop, ie, upon
* completion of processing of each command message from the client.
*/
MessageContext = AllocSetContextCreate(TopMemoryContext,
"MessageContext",
ALLOCSET_DEFAULT_MINSIZE,
ALLOCSET_DEFAULT_INITSIZE,
ALLOCSET_DEFAULT_MAXSIZE);
/*
* Remember stand-alone backend startup time
*/
if (!IsUnderPostmaster)
PgStartTime = GetCurrentTimestamp();
/*
* POSTGRES main processing loop begins here
*
* If an exception is encountered, processing resumes here so we abort the
* current transaction and start a new one.
*
* You might wonder why this isn't coded as an infinite loop around a
* PG_TRY construct. The reason is that this is the bottom of the
* exception stack, and so with PG_TRY there would be no exception handler
* in force at all during the CATCH part. By leaving the outermost setjmp
* always active, we have at least some chance of recovering from an error
* during error recovery. (If we get into an infinite loop thereby, it
* will soon be stopped by overflow of elog.c's internal state stack.)
*/
if (sigsetjmp(local_sigjmp_buf, 1) != 0)
{
/*
* NOTE: if you are tempted to add more code in this if-block,
* consider the high probability that it should be in
* AbortTransaction() instead. The only stuff done directly here
* should be stuff that is guaranteed to apply *only* for outer-level
* error recovery, such as adjusting the FE/BE protocol status.
*/
/* Since not using PG_TRY, must reset error stack by hand */
error_context_stack = NULL;
/* Prevent interrupts while cleaning up */
HOLD_INTERRUPTS();
/*
* Forget any pending QueryCancel request, since we're returning to
* the idle loop anyway, and cancel any active timeout requests.
*/
QueryCancelPending = false;
disable_all_timeouts(false);
QueryCancelPending = false; /* again in case timeout occurred */
/*
* Turn off these interrupts too. This is only needed here and not in
* other exception-catching places since these interrupts are only
* enabled while we wait for client input.
*/
DoingCommandRead = false;
DisableNotifyInterrupt();
DisableCatchupInterrupt();
/* Make sure libpq is in a good state */
pq_comm_reset();
/* Report the error to the client and/or server log */
EmitErrorReport();
/*
* Make sure debug_query_string gets reset before we possibly clobber
* the storage it points at.
*/
debug_query_string = NULL;
/*
* Abort the current transaction in order to recover.
*/
AbortCurrentTransaction();
if (am_walsender)
WalSndErrorCleanup();
/*
* Now return to normal top-level context and clear ErrorContext for
* next time.
*/
MemoryContextSwitchTo(TopMemoryContext);
FlushErrorState();
/*
* If we were handling an extended-query-protocol message, initiate
* skip till next Sync. This also causes us not to issue
* ReadyForQuery (until we get Sync).
*/
if (doing_extended_query_message)
ignore_till_sync = true;
/* We don't have a transaction command open anymore */
xact_started = false;
/* Now we can allow interrupts again */
RESUME_INTERRUPTS();
}
/* We can now handle ereport(ERROR) */
PG_exception_stack = &local_sigjmp_buf;
if (!ignore_till_sync)
send_ready_for_query = true; /* initially, or after error */
/*
* Non-error queries loop here.
*/
for (;;)
{
/*
* At top of loop, reset extended-query-message flag, so that any
* errors encountered in "idle" state don't provoke skip.
*/
doing_extended_query_message = false;
/*
* Release storage left over from prior query cycle, and create a new
* query input buffer in the cleared MessageContext.
*/
MemoryContextSwitchTo(MessageContext);
MemoryContextResetAndDeleteChildren(MessageContext);
initStringInfo(&input_message);
/*
* (1) If we've reached idle state, tell the frontend we're ready for
* a new query.
*
* Note: this includes fflush()'ing the last of the prior output.
*
* This is also a good time to send collected statistics to the
* collector, and to update the PS stats display. We avoid doing
* those every time through the message loop because it'd slow down
* processing of batched messages, and because we don't want to report
* uncommitted updates (that confuses autovacuum). The notification
* processor wants a call too, if we are not in a transaction block.
*/
if (send_ready_for_query)
{
if (IsAbortedTransactionBlockState())
{
set_ps_display("idle in transaction (aborted)", false);
pgstat_report_activity(STATE_IDLEINTRANSACTION_ABORTED, NULL);
}
else if (IsTransactionOrTransactionBlock())
{
set_ps_display("idle in transaction", false);
pgstat_report_activity(STATE_IDLEINTRANSACTION, NULL);
}
else
{
ProcessCompletedNotifies();
pgstat_report_stat(false);
set_ps_display("idle", false);
pgstat_report_activity(STATE_IDLE, NULL);
}
ReadyForQuery(whereToSendOutput);
send_ready_for_query = false;
}
/*
* (2) Allow asynchronous signals to be executed immediately if they
* come in while we are waiting for client input. (This must be
* conditional since we don't want, say, reads on behalf of COPY FROM
* STDIN doing the same thing.)
*/
DoingCommandRead = true;
/*
* (3) read a command (loop blocks here)
*/
firstchar = ReadCommand(&input_message);
/*
* (4) disable async signal conditions again.
*/
DoingCommandRead = false;
/*
* (5) check for any other interesting events that happened while we
* slept.
*/
if (got_SIGHUP)
{
got_SIGHUP = false;
ProcessConfigFile(PGC_SIGHUP);
}
/*
* (6) process the command. But ignore it if we're skipping till
* Sync.
*/
if (ignore_till_sync && firstchar != EOF)
continue;
switch (firstchar)
{
case 'Q': /* simple query */
{
const char *query_string;
/* Set statement_timestamp() */
SetCurrentStatementStartTimestamp();
query_string = pq_getmsgstring(&input_message);
pq_getmsgend(&input_message);
if (am_walsender)
exec_replication_command(query_string);
else
exec_simple_query(query_string);
send_ready_for_query = true;
}
break;
case 'P': /* parse */
{
const char *stmt_name;
const char *query_string;
int numParams;
Oid *paramTypes = NULL;
forbidden_in_wal_sender(firstchar);
/* Set statement_timestamp() */
SetCurrentStatementStartTimestamp();
stmt_name = pq_getmsgstring(&input_message);
query_string = pq_getmsgstring(&input_message);
numParams = pq_getmsgint(&input_message, 2);
if (numParams > 0)
{
int i;
paramTypes = (Oid *) palloc(numParams * sizeof(Oid));
for (i = 0; i < numParams; i++)
paramTypes[i] = pq_getmsgint(&input_message, 4);
}
pq_getmsgend(&input_message);
exec_parse_message(query_string, stmt_name,
paramTypes, numParams);
}
break;
case 'B': /* bind */
forbidden_in_wal_sender(firstchar);
/* Set statement_timestamp() */
SetCurrentStatementStartTimestamp();
/*
* this message is complex enough that it seems best to put
* the field extraction out-of-line
*/
exec_bind_message(&input_message);
break;
case 'E': /* execute */
{
const char *portal_name;
int max_rows;
forbidden_in_wal_sender(firstchar);
/* Set statement_timestamp() */
SetCurrentStatementStartTimestamp();
portal_name = pq_getmsgstring(&input_message);
max_rows = pq_getmsgint(&input_message, 4);
pq_getmsgend(&input_message);
exec_execute_message(portal_name, max_rows);
}
break;
case 'F': /* fastpath function call */
forbidden_in_wal_sender(firstchar);
/* Set statement_timestamp() */
SetCurrentStatementStartTimestamp();
/* Report query to various monitoring facilities. */
pgstat_report_activity(STATE_FASTPATH, NULL);
set_ps_display("<FASTPATH>", false);
/* start an xact for this function invocation */
start_xact_command();
/*
* Note: we may at this point be inside an aborted
* transaction. We can't throw error for that until we've
* finished reading the function-call message, so
* HandleFunctionRequest() must check for it after doing so.
* Be careful not to do anything that assumes we're inside a
* valid transaction here.
*/
/* switch back to message context */
MemoryContextSwitchTo(MessageContext);
if (HandleFunctionRequest(&input_message) == EOF)
{
/* lost frontend connection during F message input */
/*
* Reset whereToSendOutput to prevent ereport from
* attempting to send any more messages to client.
*/
if (whereToSendOutput == DestRemote)
whereToSendOutput = DestNone;
proc_exit(0);
}
/* commit the function-invocation transaction */
finish_xact_command();
send_ready_for_query = true;
break;
case 'C': /* close */
{
int close_type;
const char *close_target;
forbidden_in_wal_sender(firstchar);
close_type = pq_getmsgbyte(&input_message);
close_target = pq_getmsgstring(&input_message);
pq_getmsgend(&input_message);
switch (close_type)
{
case 'S':
if (close_target[0] != '\0')
DropPreparedStatement(close_target, false);
else
{
/* special-case the unnamed statement */
drop_unnamed_stmt();
}
break;
case 'P':
{
Portal portal;
portal = GetPortalByName(close_target);
if (PortalIsValid(portal))
PortalDrop(portal, false);
}
break;
default:
ereport(ERROR,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid CLOSE message subtype %d",
close_type)));
break;
}
if (whereToSendOutput == DestRemote)
pq_putemptymessage('3'); /* CloseComplete */
}
break;
case 'D': /* describe */
{
int describe_type;
const char *describe_target;
forbidden_in_wal_sender(firstchar);
/* Set statement_timestamp() (needed for xact) */
SetCurrentStatementStartTimestamp();
describe_type = pq_getmsgbyte(&input_message);
describe_target = pq_getmsgstring(&input_message);
pq_getmsgend(&input_message);
switch (describe_type)
{
case 'S':
exec_describe_statement_message(describe_target);
break;
case 'P':
exec_describe_portal_message(describe_target);
break;
default:
ereport(ERROR,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid DESCRIBE message subtype %d",
describe_type)));
break;
}
}
break;
case 'H': /* flush */
pq_getmsgend(&input_message);
if (whereToSendOutput == DestRemote)
pq_flush();
break;
case 'S': /* sync */
pq_getmsgend(&input_message);
finish_xact_command();
send_ready_for_query = true;
break;
/*
* 'X' means that the frontend is closing down the socket. EOF
* means unexpected loss of frontend connection. Either way,
* perform normal shutdown.
*/
case 'X':
case EOF:
/*
* Reset whereToSendOutput to prevent ereport from attempting
* to send any more messages to client.
*/
if (whereToSendOutput == DestRemote)
whereToSendOutput = DestNone;
/*
* NOTE: if you are tempted to add more code here, DON'T!
* Whatever you had in mind to do should be set up as an
* on_proc_exit or on_shmem_exit callback, instead. Otherwise
* it will fail to be called during other backend-shutdown
* scenarios.
*/
proc_exit(0);
case 'd': /* copy data */
case 'c': /* copy done */
case 'f': /* copy fail */
/*
* Accept but ignore these messages, per protocol spec; we
* probably got here because a COPY failed, and the frontend
* is still sending data.
*/
break;
default:
ereport(FATAL,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid frontend message type %d",
firstchar)));
}
} /* end of input-reading loop */
}
| void prepare_for_client_read | ( | void | ) |
Definition at line 511 of file postgres.c.
References CHECK_FOR_INTERRUPTS, DoingCommandRead, EnableCatchupInterrupt(), EnableNotifyInterrupt(), and ImmediateInterruptOK.
Referenced by interactive_getc(), and secure_read().
{
if (DoingCommandRead)
{
/* Enable immediate processing of asynchronous signals */
EnableNotifyInterrupt();
EnableCatchupInterrupt();
/* Allow cancel/die interrupts to be processed while waiting */
ImmediateInterruptOK = true;
/* And don't forget to detect one that already arrived */
CHECK_FOR_INTERRUPTS();
}
}
| void process_postgres_switches | ( | int | argc, | |
| char * | argv[], | |||
| GucContext | ctx, | |||
| const char ** | dbname | |||
| ) |
Definition at line 3255 of file postgres.c.
References EchoQuery, ereport, errcode(), errhint(), errmsg(), ERROR, FATAL, free, FrontendProtocol, get_stats_option_name(), getopt(), IsBinaryUpgrade, IsUnderPostmaster, MAXPGPATH, name, NULL, optarg, opterr, optind, OutputFileName, ParseLongOption(), progname, set_debug_options(), set_plan_disabling_options(), SetConfigOption(), strlcpy(), UseNewLine, userDoption, and value.
Referenced by PostgresMain(), and process_startup_options().
{
bool secure = (ctx == PGC_POSTMASTER);
int errs = 0;
GucSource gucsource;
int flag;
if (secure)
{
gucsource = PGC_S_ARGV; /* switches came from command line */
/* Ignore the initial --single argument, if present */
if (argc > 1 && strcmp(argv[1], "--single") == 0)
{
argv++;
argc--;
}
}
else
{
gucsource = PGC_S_CLIENT; /* switches came from client */
}
#ifdef HAVE_INT_OPTERR
/*
* Turn this off because it's either printed to stderr and not the log
* where we'd want it, or argv[0] is now "--single", which would make for
* a weird error message. We print our own error message below.
*/
opterr = 0;
#endif
/*
* Parse command-line options. CAUTION: keep this in sync with
* postmaster/postmaster.c (the option sets should not conflict) and with
* the common help() function in main/main.c.
*/
while ((flag = getopt(argc, argv, "A:B:bc:C:D:d:EeFf:h:ijk:lN:nOo:Pp:r:S:sTt:v:W:-:")) != -1)
{
switch (flag)
{
case 'A':
SetConfigOption("debug_assertions", optarg, ctx, gucsource);
break;
case 'B':
SetConfigOption("shared_buffers", optarg, ctx, gucsource);
break;
case 'b':
/* Undocumented flag used for binary upgrades */
if (secure)
IsBinaryUpgrade = true;
break;
case 'C':
/* ignored for consistency with the postmaster */
break;
case 'D':
if (secure)
userDoption = strdup(optarg);
break;
case 'd':
set_debug_options(atoi(optarg), ctx, gucsource);
break;
case 'E':
if (secure)
EchoQuery = true;
break;
case 'e':
SetConfigOption("datestyle", "euro", ctx, gucsource);
break;
case 'F':
SetConfigOption("fsync", "false", ctx, gucsource);
break;
case 'f':
if (!set_plan_disabling_options(optarg, ctx, gucsource))
errs++;
break;
case 'h':
SetConfigOption("listen_addresses", optarg, ctx, gucsource);
break;
case 'i':
SetConfigOption("listen_addresses", "*", ctx, gucsource);
break;
case 'j':
if (secure)
UseNewLine = 0;
break;
case 'k':
SetConfigOption("unix_socket_directories", optarg, ctx, gucsource);
break;
case 'l':
SetConfigOption("ssl", "true", ctx, gucsource);
break;
case 'N':
SetConfigOption("max_connections", optarg, ctx, gucsource);
break;
case 'n':
/* ignored for consistency with postmaster */
break;
case 'O':
SetConfigOption("allow_system_table_mods", "true", ctx, gucsource);
break;
case 'o':
errs++;
break;
case 'P':
SetConfigOption("ignore_system_indexes", "true", ctx, gucsource);
break;
case 'p':
SetConfigOption("port", optarg, ctx, gucsource);
break;
case 'r':
/* send output (stdout and stderr) to the given file */
if (secure)
strlcpy(OutputFileName, optarg, MAXPGPATH);
break;
case 'S':
SetConfigOption("work_mem", optarg, ctx, gucsource);
break;
case 's':
SetConfigOption("log_statement_stats", "true", ctx, gucsource);
break;
case 'T':
/* ignored for consistency with the postmaster */
break;
case 't':
{
const char *tmp = get_stats_option_name(optarg);
if (tmp)
SetConfigOption(tmp, "true", ctx, gucsource);
else
errs++;
break;
}
case 'v':
/*
* -v is no longer used in normal operation, since
* FrontendProtocol is already set before we get here. We keep
* the switch only for possible use in standalone operation,
* in case we ever support using normal FE/BE protocol with a
* standalone backend.
*/
if (secure)
FrontendProtocol = (ProtocolVersion) atoi(optarg);
break;
case 'W':
SetConfigOption("post_auth_delay", optarg, ctx, gucsource);
break;
case 'c':
case '-':
{
char *name,
*value;
ParseLongOption(optarg, &name, &value);
if (!value)
{
if (flag == '-')
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("--%s requires a value",
optarg)));
else
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("-c %s requires a value",
optarg)));
}
SetConfigOption(name, value, ctx, gucsource);
free(name);
if (value)
free(value);
break;
}
default:
errs++;
break;
}
if (errs)
break;
}
/*
* Optional database name should be there only if *dbname is NULL.
*/
if (!errs && dbname && *dbname == NULL && argc - optind >= 1)
*dbname = strdup(argv[optind++]);
if (errs || argc != optind)
{
if (errs)
optind--; /* complain about the previous argument */
/* spell the error message a bit differently depending on context */
if (IsUnderPostmaster)
ereport(FATAL,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("invalid command-line argument for server process: %s", argv[optind]),
errhint("Try \"%s --help\" for more information.", progname)));
else
ereport(FATAL,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("%s: invalid command-line argument: %s",
progname, argv[optind]),
errhint("Try \"%s --help\" for more information.", progname)));
}
/*
* Reset getopt(3) library so that it will work correctly in subprocesses
* or when this function is called a second time with another array.
*/
optind = 1;
#ifdef HAVE_INT_OPTRESET
optreset = 1; /* some systems need this too */
#endif
}
| void ProcessInterrupts | ( | void | ) |
Definition at line 2816 of file postgres.c.
References Assert, ClientAuthInProgress, ClientConnectionLost, CritSectionCount, DestRemote, DisableCatchupInterrupt(), DisableNotifyInterrupt(), DoingCommandRead, ereport, errcode(), errdetail_recovery_conflict(), errhint(), errmsg(), ERROR, FATAL, get_timeout_indicator(), ImmediateInterruptOK, InterruptHoldoffCount, InterruptPending, IsAutoVacuumWorkerProcess(), LOCK_TIMEOUT, pgstat_report_recovery_conflict(), ProcDiePending, PROCSIG_RECOVERY_CONFLICT_DATABASE, QueryCancelPending, RecoveryConflictPending, RecoveryConflictReason, RecoveryConflictRetryable, STATEMENT_TIMEOUT, and whereToSendOutput.
{
/* OK to accept interrupt now? */
if (InterruptHoldoffCount != 0 || CritSectionCount != 0)
return;
InterruptPending = false;
if (ProcDiePending)
{
ProcDiePending = false;
QueryCancelPending = false; /* ProcDie trumps QueryCancel */
ImmediateInterruptOK = false; /* not idle anymore */
DisableNotifyInterrupt();
DisableCatchupInterrupt();
/* As in quickdie, don't risk sending to client during auth */
if (ClientAuthInProgress && whereToSendOutput == DestRemote)
whereToSendOutput = DestNone;
if (IsAutoVacuumWorkerProcess())
ereport(FATAL,
(errcode(ERRCODE_ADMIN_SHUTDOWN),
errmsg("terminating autovacuum process due to administrator command")));
else if (RecoveryConflictPending && RecoveryConflictRetryable)
{
pgstat_report_recovery_conflict(RecoveryConflictReason);
ereport(FATAL,
(errcode(ERRCODE_T_R_SERIALIZATION_FAILURE),
errmsg("terminating connection due to conflict with recovery"),
errdetail_recovery_conflict()));
}
else if (RecoveryConflictPending)
{
/* Currently there is only one non-retryable recovery conflict */
Assert(RecoveryConflictReason == PROCSIG_RECOVERY_CONFLICT_DATABASE);
pgstat_report_recovery_conflict(RecoveryConflictReason);
ereport(FATAL,
(errcode(ERRCODE_DATABASE_DROPPED),
errmsg("terminating connection due to conflict with recovery"),
errdetail_recovery_conflict()));
}
else
ereport(FATAL,
(errcode(ERRCODE_ADMIN_SHUTDOWN),
errmsg("terminating connection due to administrator command")));
}
if (ClientConnectionLost)
{
QueryCancelPending = false; /* lost connection trumps QueryCancel */
ImmediateInterruptOK = false; /* not idle anymore */
DisableNotifyInterrupt();
DisableCatchupInterrupt();
/* don't send to client, we already know the connection to be dead. */
whereToSendOutput = DestNone;
ereport(FATAL,
(errcode(ERRCODE_CONNECTION_FAILURE),
errmsg("connection to client lost")));
}
if (QueryCancelPending)
{
QueryCancelPending = false;
if (ClientAuthInProgress)
{
ImmediateInterruptOK = false; /* not idle anymore */
DisableNotifyInterrupt();
DisableCatchupInterrupt();
/* As in quickdie, don't risk sending to client during auth */
if (whereToSendOutput == DestRemote)
whereToSendOutput = DestNone;
ereport(ERROR,
(errcode(ERRCODE_QUERY_CANCELED),
errmsg("canceling authentication due to timeout")));
}
/*
* If LOCK_TIMEOUT and STATEMENT_TIMEOUT indicators are both set, we
* prefer to report the former; but be sure to clear both.
*/
if (get_timeout_indicator(LOCK_TIMEOUT, true))
{
ImmediateInterruptOK = false; /* not idle anymore */
(void) get_timeout_indicator(STATEMENT_TIMEOUT, true);
DisableNotifyInterrupt();
DisableCatchupInterrupt();
ereport(ERROR,
(errcode(ERRCODE_QUERY_CANCELED),
errmsg("canceling statement due to lock timeout")));
}
if (get_timeout_indicator(STATEMENT_TIMEOUT, true))
{
ImmediateInterruptOK = false; /* not idle anymore */
DisableNotifyInterrupt();
DisableCatchupInterrupt();
ereport(ERROR,
(errcode(ERRCODE_QUERY_CANCELED),
errmsg("canceling statement due to statement timeout")));
}
if (IsAutoVacuumWorkerProcess())
{
ImmediateInterruptOK = false; /* not idle anymore */
DisableNotifyInterrupt();
DisableCatchupInterrupt();
ereport(ERROR,
(errcode(ERRCODE_QUERY_CANCELED),
errmsg("canceling autovacuum task")));
}
if (RecoveryConflictPending)
{
ImmediateInterruptOK = false; /* not idle anymore */
RecoveryConflictPending = false;
DisableNotifyInterrupt();
DisableCatchupInterrupt();
pgstat_report_recovery_conflict(RecoveryConflictReason);
if (DoingCommandRead)
ereport(FATAL,
(errcode(ERRCODE_T_R_SERIALIZATION_FAILURE),
errmsg("terminating connection due to conflict with recovery"),
errdetail_recovery_conflict(),
errhint("In a moment you should be able to reconnect to the"
" database and repeat your command.")));
else
ereport(ERROR,
(errcode(ERRCODE_T_R_SERIALIZATION_FAILURE),
errmsg("canceling statement due to conflict with recovery"),
errdetail_recovery_conflict()));
}
/*
* If we are reading a command from the client, just ignore the cancel
* request --- sending an extra error message won't accomplish
* anything. Otherwise, go ahead and throw the error.
*/
if (!DoingCommandRead)
{
ImmediateInterruptOK = false; /* not idle anymore */
DisableNotifyInterrupt();
DisableCatchupInterrupt();
ereport(ERROR,
(errcode(ERRCODE_QUERY_CANCELED),
errmsg("canceling statement due to user request")));
}
}
/* If we get here, do nothing (probably, QueryCancelPending was reset) */
}
| void quickdie | ( | SIGNAL_ARGS | ) |
Definition at line 2522 of file postgres.c.
References BlockSig, ClientAuthInProgress, DestRemote, ereport, errcode(), errdetail(), errhint(), errmsg(), on_exit_reset(), PG_SETMASK, sigaddset, SIGQUIT, WARNING, and whereToSendOutput.
Referenced by AutoVacLauncherMain(), AutoVacWorkerMain(), bootstrap_signals(), PostgresMain(), and WalSndSignals().
{
sigaddset(&BlockSig, SIGQUIT); /* prevent nested calls */
PG_SETMASK(&BlockSig);
/*
* If we're aborting out of client auth, don't risk trying to send
* anything to the client; we will likely violate the protocol, not to
* mention that we may have interrupted the guts of OpenSSL or some
* authentication library.
*/
if (ClientAuthInProgress && whereToSendOutput == DestRemote)
whereToSendOutput = DestNone;
/*
* Ideally this should be ereport(FATAL), but then we'd not get control
* back...
*/
ereport(WARNING,
(errcode(ERRCODE_CRASH_SHUTDOWN),
errmsg("terminating connection because of crash of another server process"),
errdetail("The postmaster has commanded this server process to roll back"
" the current transaction and exit, because another"
" server process exited abnormally and possibly corrupted"
" shared memory."),
errhint("In a moment you should be able to reconnect to the"
" database and repeat your command.")));
/*
* We DO NOT want to run proc_exit() callbacks -- we're here because
* shared memory may be corrupted, so we don't want to try to clean up our
* transaction. Just nail the windows shut and get out of town. Now that
* there's an atexit callback to prevent third-party code from breaking
* things by calling exit() directly, we have to reset the callbacks
* explicitly to make this work as intended.
*/
on_exit_reset();
/*
* Note we do exit(2) not exit(0). This is to force the postmaster into a
* system reset cycle if some idiot DBA sends a manual SIGQUIT to a random
* backend. This is necessary precisely because we don't clean up our
* shared memory state. (The "dead man switch" mechanism in pmsignal.c
* should ensure the postmaster sees this as a crash, too, but no harm in
* being doubly sure.)
*/
exit(2);
}
| static int ReadCommand | ( | StringInfo | inBuf | ) | [static] |
Definition at line 487 of file postgres.c.
References DestRemote, InteractiveBackend(), SocketBackend(), and whereToSendOutput.
Referenced by PostgresMain().
{
int result;
if (whereToSendOutput == DestRemote)
result = SocketBackend(inBuf);
else
result = InteractiveBackend(inBuf);
return result;
}
| void RecoveryConflictInterrupt | ( | ProcSignalReason | reason | ) |
Definition at line 2686 of file postgres.c.
References Assert, CritSectionCount, DisableCatchupInterrupt(), DisableNotifyInterrupt(), elog, FATAL, HoldingBufferPinThatDelaysRecovery(), ImmediateInterruptOK, InterruptHoldoffCount, InterruptPending, IsAbortedTransactionBlockState(), IsSubTransaction(), IsTransactionOrTransactionBlock(), IsWaitingForLock(), LockErrorCleanup(), MyProc, proc_exit_inprogress, ProcDiePending, ProcessInterrupts(), PROCSIG_RECOVERY_CONFLICT_BUFFERPIN, PROCSIG_RECOVERY_CONFLICT_DATABASE, PROCSIG_RECOVERY_CONFLICT_LOCK, PROCSIG_RECOVERY_CONFLICT_SNAPSHOT, PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK, PROCSIG_RECOVERY_CONFLICT_TABLESPACE, QueryCancelPending, RecoveryConflictPending, PGPROC::recoveryConflictPending, RecoveryConflictReason, and RecoveryConflictRetryable.
Referenced by procsignal_sigusr1_handler().
{
int save_errno = errno;
/*
* Don't joggle the elbow of proc_exit
*/
if (!proc_exit_inprogress)
{
RecoveryConflictReason = reason;
switch (reason)
{
case PROCSIG_RECOVERY_CONFLICT_STARTUP_DEADLOCK:
/*
* If we aren't waiting for a lock we can never deadlock.
*/
if (!IsWaitingForLock())
return;
/* Intentional drop through to check wait for pin */
case PROCSIG_RECOVERY_CONFLICT_BUFFERPIN:
/*
* If we aren't blocking the Startup process there is nothing
* more to do.
*/
if (!HoldingBufferPinThatDelaysRecovery())
return;
MyProc->recoveryConflictPending = true;
/* Intentional drop through to error handling */
case PROCSIG_RECOVERY_CONFLICT_LOCK:
case PROCSIG_RECOVERY_CONFLICT_TABLESPACE:
case PROCSIG_RECOVERY_CONFLICT_SNAPSHOT:
/*
* If we aren't in a transaction any longer then ignore.
*/
if (!IsTransactionOrTransactionBlock())
return;
/*
* If we can abort just the current subtransaction then we are
* OK to throw an ERROR to resolve the conflict. Otherwise
* drop through to the FATAL case.
*
* XXX other times that we can throw just an ERROR *may* be
* PROCSIG_RECOVERY_CONFLICT_LOCK if no locks are held in
* parent transactions
*
* PROCSIG_RECOVERY_CONFLICT_SNAPSHOT if no snapshots are held
* by parent transactions and the transaction is not
* transaction-snapshot mode
*
* PROCSIG_RECOVERY_CONFLICT_TABLESPACE if no temp files or
* cursors open in parent transactions
*/
if (!IsSubTransaction())
{
/*
* If we already aborted then we no longer need to cancel.
* We do this here since we do not wish to ignore aborted
* subtransactions, which must cause FATAL, currently.
*/
if (IsAbortedTransactionBlockState())
return;
RecoveryConflictPending = true;
QueryCancelPending = true;
InterruptPending = true;
break;
}
/* Intentional drop through to session cancel */
case PROCSIG_RECOVERY_CONFLICT_DATABASE:
RecoveryConflictPending = true;
ProcDiePending = true;
InterruptPending = true;
break;
default:
elog(FATAL, "unrecognized conflict mode: %d",
(int) reason);
}
Assert(RecoveryConflictPending && (QueryCancelPending || ProcDiePending));
/*
* All conflicts apart from database cause dynamic errors where the
* command or transaction can be retried at a later point with some
* potential for success. No need to reset this, since non-retryable
* conflict errors are currently FATAL.
*/
if (reason == PROCSIG_RECOVERY_CONFLICT_DATABASE)
RecoveryConflictRetryable = false;
/*
* If it's safe to interrupt, and we're waiting for input or a lock,
* service the interrupt immediately
*/
if (ImmediateInterruptOK && InterruptHoldoffCount == 0 &&
CritSectionCount == 0)
{
/* bump holdoff count to make ProcessInterrupts() a no-op */
/* until we are done getting ready for it */
InterruptHoldoffCount++;
LockErrorCleanup(); /* prevent CheckDeadLock from running */
DisableNotifyInterrupt();
DisableCatchupInterrupt();
InterruptHoldoffCount--;
ProcessInterrupts();
}
}
errno = save_errno;
}
| void ResetUsage | ( | void | ) |
Definition at line 4295 of file postgres.c.
References getrusage(), gettimeofday(), NULL, RUSAGE_SELF, Save_r, and Save_t.
Referenced by _bt_leafbuild(), _SPI_pquery(), btbuild(), exec_bind_message(), exec_execute_message(), exec_parse_message(), exec_simple_query(), pg_analyze_and_rewrite(), pg_analyze_and_rewrite_params(), pg_parse_query(), pg_plan_query(), pg_rewrite_query(), PortalRun(), and PortalRunMulti().
{
getrusage(RUSAGE_SELF, &Save_r);
gettimeofday(&Save_t, NULL);
}
| void restore_stack_base | ( | pg_stack_base_t | base | ) |
Definition at line 3032 of file postgres.c.
References stack_base_ptr.
{
#if defined(__ia64__) || defined(__ia64)
stack_base_ptr = base.stack_base_ptr;
register_stack_base_ptr = base.register_stack_base_ptr;
#else
stack_base_ptr = base;
#endif
}
| void set_debug_options | ( | int | debug_flag, | |
| GucContext | context, | |||
| GucSource | source | |||
| ) |
Definition at line 3144 of file postgres.c.
References PGC_POSTMASTER, and SetConfigOption().
Referenced by PostmasterMain(), and process_postgres_switches().
{
if (debug_flag > 0)
{
char debugstr[64];
sprintf(debugstr, "debug%d", debug_flag);
SetConfigOption("log_min_messages", debugstr, context, source);
}
else
SetConfigOption("log_min_messages", "notice", context, source);
if (debug_flag >= 1 && context == PGC_POSTMASTER)
{
SetConfigOption("log_connections", "true", context, source);
SetConfigOption("log_disconnections", "true", context, source);
}
if (debug_flag >= 2)
SetConfigOption("log_statement", "all", context, source);
if (debug_flag >= 3)
SetConfigOption("debug_print_parse", "true", context, source);
if (debug_flag >= 4)
SetConfigOption("debug_print_plan", "true", context, source);
if (debug_flag >= 5)
SetConfigOption("debug_print_rewritten", "true", context, source);
}
| bool set_plan_disabling_options | ( | const char * | arg, | |
| GucContext | context, | |||
| GucSource | source | |||
| ) |
Definition at line 3173 of file postgres.c.
References SetConfigOption().
Referenced by PostmasterMain(), and process_postgres_switches().
{
const char *tmp = NULL;
switch (arg[0])
{
case 's': /* seqscan */
tmp = "enable_seqscan";
break;
case 'i': /* indexscan */
tmp = "enable_indexscan";
break;
case 'o': /* indexonlyscan */
tmp = "enable_indexonlyscan";
break;
case 'b': /* bitmapscan */
tmp = "enable_bitmapscan";
break;
case 't': /* tidscan */
tmp = "enable_tidscan";
break;
case 'n': /* nestloop */
tmp = "enable_nestloop";
break;
case 'm': /* mergejoin */
tmp = "enable_mergejoin";
break;
case 'h': /* hashjoin */
tmp = "enable_hashjoin";
break;
}
if (tmp)
{
SetConfigOption(tmp, "false", context, source);
return true;
}
else
return false;
}
| pg_stack_base_t set_stack_base | ( | void | ) |
Definition at line 3001 of file postgres.c.
References stack_base_ptr.
Referenced by PostmasterMain().
{
char stack_base;
pg_stack_base_t old;
#if defined(__ia64__) || defined(__ia64)
old.stack_base_ptr = stack_base_ptr;
old.register_stack_base_ptr = register_stack_base_ptr;
#else
old = stack_base_ptr;
#endif
/* Set up reference point for stack depth checking */
stack_base_ptr = &stack_base;
#if defined(__ia64__) || defined(__ia64)
register_stack_base_ptr = ia64_get_bsp();
#endif
return old;
}
| void ShowUsage | ( | const char * | title | ) |
Definition at line 4302 of file postgres.c.
References appendStringInfo(), StringInfoData::data, ereport, errdetail_internal(), errmsg_internal(), getrusage(), gettimeofday(), initStringInfo(), StringInfoData::len, LOG, NULL, pfree(), rusage::ru_stime, rusage::ru_utime, RUSAGE_SELF, Save_r, and Save_t.
Referenced by _bt_leafbuild(), _SPI_pquery(), btbuild(), exec_bind_message(), exec_execute_message(), exec_parse_message(), exec_simple_query(), pg_analyze_and_rewrite(), pg_analyze_and_rewrite_params(), pg_parse_query(), pg_plan_query(), pg_rewrite_query(), PortalRun(), and PortalRunMulti().
{
StringInfoData str;
struct timeval user,
sys;
struct timeval elapse_t;
struct rusage r;
getrusage(RUSAGE_SELF, &r);
gettimeofday(&elapse_t, NULL);
memcpy((char *) &user, (char *) &r.ru_utime, sizeof(user));
memcpy((char *) &sys, (char *) &r.ru_stime, sizeof(sys));
if (elapse_t.tv_usec < Save_t.tv_usec)
{
elapse_t.tv_sec--;
elapse_t.tv_usec += 1000000;
}
if (r.ru_utime.tv_usec < Save_r.ru_utime.tv_usec)
{
r.ru_utime.tv_sec--;
r.ru_utime.tv_usec += 1000000;
}
if (r.ru_stime.tv_usec < Save_r.ru_stime.tv_usec)
{
r.ru_stime.tv_sec--;
r.ru_stime.tv_usec += 1000000;
}
/*
* the only stats we don't show here are for memory usage -- i can't
* figure out how to interpret the relevant fields in the rusage struct,
* and they change names across o/s platforms, anyway. if you can figure
* out what the entries mean, you can somehow extract resident set size,
* shared text size, and unshared data and stack sizes.
*/
initStringInfo(&str);
appendStringInfo(&str, "! system usage stats:\n");
appendStringInfo(&str,
"!\t%ld.%06ld elapsed %ld.%06ld user %ld.%06ld system sec\n",
(long) (elapse_t.tv_sec - Save_t.tv_sec),
(long) (elapse_t.tv_usec - Save_t.tv_usec),
(long) (r.ru_utime.tv_sec - Save_r.ru_utime.tv_sec),
(long) (r.ru_utime.tv_usec - Save_r.ru_utime.tv_usec),
(long) (r.ru_stime.tv_sec - Save_r.ru_stime.tv_sec),
(long) (r.ru_stime.tv_usec - Save_r.ru_stime.tv_usec));
appendStringInfo(&str,
"!\t[%ld.%06ld user %ld.%06ld sys total]\n",
(long) user.tv_sec,
(long) user.tv_usec,
(long) sys.tv_sec,
(long) sys.tv_usec);
#if defined(HAVE_GETRUSAGE)
appendStringInfo(&str,
"!\t%ld/%ld [%ld/%ld] filesystem blocks in/out\n",
r.ru_inblock - Save_r.ru_inblock,
/* they only drink coffee at dec */
r.ru_oublock - Save_r.ru_oublock,
r.ru_inblock, r.ru_oublock);
appendStringInfo(&str,
"!\t%ld/%ld [%ld/%ld] page faults/reclaims, %ld [%ld] swaps\n",
r.ru_majflt - Save_r.ru_majflt,
r.ru_minflt - Save_r.ru_minflt,
r.ru_majflt, r.ru_minflt,
r.ru_nswap - Save_r.ru_nswap,
r.ru_nswap);
appendStringInfo(&str,
"!\t%ld [%ld] signals rcvd, %ld/%ld [%ld/%ld] messages rcvd/sent\n",
r.ru_nsignals - Save_r.ru_nsignals,
r.ru_nsignals,
r.ru_msgrcv - Save_r.ru_msgrcv,
r.ru_msgsnd - Save_r.ru_msgsnd,
r.ru_msgrcv, r.ru_msgsnd);
appendStringInfo(&str,
"!\t%ld/%ld [%ld/%ld] voluntary/involuntary context switches\n",
r.ru_nvcsw - Save_r.ru_nvcsw,
r.ru_nivcsw - Save_r.ru_nivcsw,
r.ru_nvcsw, r.ru_nivcsw);
#endif /* HAVE_GETRUSAGE */
/* remove trailing newline */
if (str.data[str.len - 1] == '\n')
str.data[--str.len] = '\0';
ereport(LOG,
(errmsg_internal("%s", title),
errdetail_internal("%s", str.data)));
pfree(str.data);
}
| static void SigHupHandler | ( | SIGNAL_ARGS | ) | [static] |
Definition at line 2668 of file postgres.c.
References got_SIGHUP, MyProc, PGPROC::procLatch, and SetLatch().
Referenced by PostgresMain().
{
int save_errno = errno;
got_SIGHUP = true;
if (MyProc)
SetLatch(&MyProc->procLatch);
errno = save_errno;
}
| static int SocketBackend | ( | StringInfo | inBuf | ) | [static] |
Definition at line 337 of file postgres.c.
References COMMERROR, DEBUG1, doing_extended_query_message, ereport, errcode(), errmsg(), FATAL, FrontendProtocol, ignore_till_sync, IsTransactionState(), PG_PROTOCOL_MAJOR, pq_getbyte(), pq_getmessage(), pq_getstring(), and whereToSendOutput.
Referenced by ReadCommand().
{
int qtype;
/*
* Get message type code from the frontend.
*/
qtype = pq_getbyte();
if (qtype == EOF) /* frontend disconnected */
{
if (IsTransactionState())
ereport(COMMERROR,
(errcode(ERRCODE_CONNECTION_FAILURE),
errmsg("unexpected EOF on client connection with an open transaction")));
else
{
/*
* Can't send DEBUG log messages to client at this point. Since
* we're disconnecting right away, we don't need to restore
* whereToSendOutput.
*/
whereToSendOutput = DestNone;
ereport(DEBUG1,
(errcode(ERRCODE_CONNECTION_DOES_NOT_EXIST),
errmsg("unexpected EOF on client connection")));
}
return qtype;
}
/*
* Validate message type code before trying to read body; if we have lost
* sync, better to say "command unknown" than to run out of memory because
* we used garbage as a length word.
*
* This also gives us a place to set the doing_extended_query_message flag
* as soon as possible.
*/
switch (qtype)
{
case 'Q': /* simple query */
doing_extended_query_message = false;
if (PG_PROTOCOL_MAJOR(FrontendProtocol) < 3)
{
/* old style without length word; convert */
if (pq_getstring(inBuf))
{
if (IsTransactionState())
ereport(COMMERROR,
(errcode(ERRCODE_CONNECTION_FAILURE),
errmsg("unexpected EOF on client connection with an open transaction")));
else
{
/*
* Can't send DEBUG log messages to client at this
* point.Since we're disconnecting right away, we
* don't need to restore whereToSendOutput.
*/
whereToSendOutput = DestNone;
ereport(DEBUG1,
(errcode(ERRCODE_CONNECTION_DOES_NOT_EXIST),
errmsg("unexpected EOF on client connection")));
}
return EOF;
}
}
break;
case 'F': /* fastpath function call */
/* we let fastpath.c cope with old-style input of this */
doing_extended_query_message = false;
break;
case 'X': /* terminate */
doing_extended_query_message = false;
ignore_till_sync = false;
break;
case 'B': /* bind */
case 'C': /* close */
case 'D': /* describe */
case 'E': /* execute */
case 'H': /* flush */
case 'P': /* parse */
doing_extended_query_message = true;
/* these are only legal in protocol 3 */
if (PG_PROTOCOL_MAJOR(FrontendProtocol) < 3)
ereport(FATAL,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid frontend message type %d", qtype)));
break;
case 'S': /* sync */
/* stop any active skip-till-Sync */
ignore_till_sync = false;
/* mark not-extended, so that a new error doesn't begin skip */
doing_extended_query_message = false;
/* only legal in protocol 3 */
if (PG_PROTOCOL_MAJOR(FrontendProtocol) < 3)
ereport(FATAL,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid frontend message type %d", qtype)));
break;
case 'd': /* copy data */
case 'c': /* copy done */
case 'f': /* copy fail */
doing_extended_query_message = false;
/* these are only legal in protocol 3 */
if (PG_PROTOCOL_MAJOR(FrontendProtocol) < 3)
ereport(FATAL,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid frontend message type %d", qtype)));
break;
default:
/*
* Otherwise we got garbage from the frontend. We treat this as
* fatal because we have probably lost message boundary sync, and
* there's no good way to recover.
*/
ereport(FATAL,
(errcode(ERRCODE_PROTOCOL_VIOLATION),
errmsg("invalid frontend message type %d", qtype)));
break;
}
/*
* In protocol version 3, all frontend messages have a length word next
* after the type code; we can read the message contents independently of
* the type.
*/
if (PG_PROTOCOL_MAJOR(FrontendProtocol) >= 3)
{
if (pq_getmessage(inBuf, 0))
return EOF; /* suitable message already logged */
}
return qtype;
}
| static void start_xact_command | ( | void | ) | [static] |
Definition at line 2380 of file postgres.c.
References DEBUG3, disable_timeout(), enable_timeout_after(), ereport, errmsg_internal(), StartTransactionCommand(), STATEMENT_TIMEOUT, StatementTimeout, and xact_started.
Referenced by exec_bind_message(), exec_describe_portal_message(), exec_describe_statement_message(), exec_execute_message(), exec_parse_message(), exec_simple_query(), and PostgresMain().
{
if (!xact_started)
{
ereport(DEBUG3,
(errmsg_internal("StartTransactionCommand")));
StartTransactionCommand();
/* Set statement timeout running, if any */
/* NB: this mustn't be enabled until we are within an xact */
if (StatementTimeout > 0)
enable_timeout_after(STATEMENT_TIMEOUT, StatementTimeout);
else
disable_timeout(STATEMENT_TIMEOUT, false);
xact_started = true;
}
}
| void StatementCancelHandler | ( | SIGNAL_ARGS | ) |
Definition at line 2616 of file postgres.c.
References CritSectionCount, DisableCatchupInterrupt(), DisableNotifyInterrupt(), ImmediateInterruptOK, InterruptHoldoffCount, InterruptPending, LockErrorCleanup(), MyProc, proc_exit_inprogress, ProcessInterrupts(), PGPROC::procLatch, QueryCancelPending, and SetLatch().
Referenced by AutoVacLauncherMain(), AutoVacWorkerMain(), do_start_bgworker(), and PostgresMain().
{
int save_errno = errno;
/*
* Don't joggle the elbow of proc_exit
*/
if (!proc_exit_inprogress)
{
InterruptPending = true;
QueryCancelPending = true;
/*
* If it's safe to interrupt, and we're waiting for input or a lock,
* service the interrupt immediately
*/
if (ImmediateInterruptOK && InterruptHoldoffCount == 0 &&
CritSectionCount == 0)
{
/* bump holdoff count to make ProcessInterrupts() a no-op */
/* until we are done getting ready for it */
InterruptHoldoffCount++;
LockErrorCleanup(); /* prevent CheckDeadLock from running */
DisableNotifyInterrupt();
DisableCatchupInterrupt();
InterruptHoldoffCount--;
ProcessInterrupts();
}
}
/* If we're still here, waken anything waiting on the process latch */
if (MyProc)
SetLatch(&MyProc->procLatch);
errno = save_errno;
}
| const char* debug_query_string |
Definition at line 92 of file postgres.c.
Referenced by current_query(), errstart(), exec_bind_message(), exec_execute_message(), exec_parse_message(), exec_simple_query(), PostgresMain(), proc_exit_prepare(), send_message_to_server_log(), and write_csvlog().
bool doing_extended_query_message = false [static] |
Definition at line 157 of file postgres.c.
Referenced by PostgresMain(), and SocketBackend().
bool DoingCommandRead = false [static] |
Definition at line 151 of file postgres.c.
Referenced by client_read_ended(), PostgresMain(), prepare_for_client_read(), and ProcessInterrupts().
Definition at line 170 of file postgres.c.
Referenced by InteractiveBackend(), and process_postgres_switches().
volatile sig_atomic_t got_SIGHUP = false [static] |
Definition at line 138 of file postgres.c.
Referenced by PostgresMain(), and SigHupHandler().
bool ignore_till_sync = false [static] |
Definition at line 158 of file postgres.c.
Referenced by PostgresMain(), and SocketBackend().
| bool Log_disconnections = false |
Definition at line 98 of file postgres.c.
Referenced by PostgresMain().
| int log_statement = LOGSTMT_NONE |
Definition at line 100 of file postgres.c.
Referenced by check_log_statement(), and HandleFunctionRequest().
| int max_stack_depth = 100 |
Definition at line 103 of file postgres.c.
Referenced by check_stack_depth().
long max_stack_depth_bytes = 100 * 1024L [static] |
Definition at line 116 of file postgres.c.
Referenced by assign_max_stack_depth(), and check_stack_depth().
| int PostAuthDelay = 0 |
Definition at line 106 of file postgres.c.
Referenced by AutoVacLauncherMain(), AutoVacWorkerMain(), do_start_bgworker(), and InitPostgres().
bool RecoveryConflictPending = false [static] |
Definition at line 183 of file postgres.c.
Referenced by ProcessInterrupts(), and RecoveryConflictInterrupt().
ProcSignalReason RecoveryConflictReason [static] |
Definition at line 185 of file postgres.c.
Referenced by errdetail_recovery_conflict(), ProcessInterrupts(), and RecoveryConflictInterrupt().
bool RecoveryConflictRetryable = true [static] |
Definition at line 184 of file postgres.c.
Referenced by ProcessInterrupts(), and RecoveryConflictInterrupt().
Definition at line 4291 of file postgres.c.
Referenced by ResetUsage(), and ShowUsage().
struct timeval Save_t [static] |
Definition at line 4292 of file postgres.c.
Referenced by ResetUsage(), and ShowUsage().
| char* stack_base_ptr = NULL |
Definition at line 124 of file postgres.c.
Referenced by check_stack_depth(), restore_stack_base(), and set_stack_base().
CachedPlanSource* unnamed_stmt_psrc = NULL [static] |
Definition at line 165 of file postgres.c.
int UseNewLine = 1 [static] |
Definition at line 177 of file postgres.c.
Referenced by InteractiveBackend(), and process_postgres_switches().
const char* userDoption = NULL [static] |
Definition at line 168 of file postgres.c.
Referenced by AuxiliaryProcessMain(), PostgresMain(), PostmasterMain(), and process_postgres_switches().
| CommandDest whereToSendOutput = DestDebug |
Definition at line 95 of file postgres.c.
Referenced by BackendInitialize(), BeginCopyFrom(), BeginCopyTo(), BeginReportingGUCOptions(), DoCopyTo(), errfinish(), errstart(), exec_bind_message(), exec_describe_portal_message(), exec_describe_statement_message(), exec_execute_message(), exec_parse_message(), exec_simple_query(), HandleFunctionRequest(), NotifyMyFrontEnd(), pg_re_throw(), PostgresMain(), PostmasterMain(), ProcessInterrupts(), quickdie(), ReadCommand(), send_message_to_server_log(), SocketBackend(), SyncRepWaitForLSN(), and WalSndLoop().
bool xact_started = false [static] |
Definition at line 144 of file postgres.c.
Referenced by finish_xact_command(), PostgresMain(), and start_xact_command().
1.7.1