params.h File Reference

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Data Structures
struct	ParamExternData
struct	ParamListInfoData
struct	ParamExecData
Defines
#define	PARAM_FLAG_CONST   0x0001
Typedefs
typedef struct ParamExternData	ParamExternData
typedef struct ParamListInfoData *	ParamListInfo
typedef void(*	ParamFetchHook )(ParamListInfo params, int paramid)
typedef void(*	ParserSetupHook )(struct ParseState *pstate, void *arg)
typedef struct ParamListInfoData	ParamListInfoData
typedef struct ParamExecData	ParamExecData
Functions
ParamListInfo	copyParamList (ParamListInfo from)

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Define Documentation

#define PARAM_FLAG_CONST   0x0001

Definition at line 51 of file params.h.

Referenced by eval_const_expressions_mutator().

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Typedef Documentation

typedef struct ParamExecData ParamExecData

typedef struct ParamExternData ParamExternData

typedef void(* ParamFetchHook)(ParamListInfo params, int paramid)

Definition at line 63 of file params.h.

typedef struct ParamListInfoData* ParamListInfo

Definition at line 61 of file params.h.

typedef struct ParamListInfoData ParamListInfoData

typedef void(* ParserSetupHook)(struct ParseState *pstate, void *arg)

Definition at line 65 of file params.h.

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Function Documentation

ParamListInfo copyParamList

(

ParamListInfo

from

)

Definition at line 34 of file params.c.

References datumCopy(), get_typlenbyval(), i, ParamExternData::isnull, NULL, ParamListInfoData::numParams, OidIsValid, palloc(), ParamListInfoData::paramFetch, ParamListInfoData::paramFetchArg, ParamListInfoData::params, ParamListInfoData::parserSetup, ParamListInfoData::parserSetupArg, ParamExternData::ptype, and ParamExternData::value.

Referenced by PerformCursorOpen(), and SPI_cursor_open_internal().

{
    ParamListInfo retval;
    Size        size;
    int         i;

    if (from == NULL || from->numParams <= 0)
        return NULL;

    /* sizeof(ParamListInfoData) includes the first array element */
    size = sizeof(ParamListInfoData) +
        (from->numParams - 1) * sizeof(ParamExternData);

    retval = (ParamListInfo) palloc(size);
    retval->paramFetch = NULL;
    retval->paramFetchArg = NULL;
    retval->parserSetup = NULL;
    retval->parserSetupArg = NULL;
    retval->numParams = from->numParams;

    for (i = 0; i < from->numParams; i++)
    {
        ParamExternData *oprm = &from->params[i];
        ParamExternData *nprm = &retval->params[i];
        int16       typLen;
        bool        typByVal;

        /* give hook a chance in case parameter is dynamic */
        if (!OidIsValid(oprm->ptype) && from->paramFetch != NULL)
            (*from->paramFetch) (from, i + 1);

        /* flat-copy the parameter info */
        *nprm = *oprm;

        /* need datumCopy in case it's a pass-by-reference datatype */
        if (nprm->isnull || !OidIsValid(nprm->ptype))
            continue;
        get_typlenbyval(nprm->ptype, &typLen, &typByVal);
        nprm->value = datumCopy(nprm->value, typByVal, typLen);
    }

    return retval;
}