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00001 /*------------------------------------------------------------------------- 00002 * 00003 * nodeFuncs.h 00004 * Various general-purpose manipulations of Node trees 00005 * 00006 * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group 00007 * Portions Copyright (c) 1994, Regents of the University of California 00008 * 00009 * src/include/nodes/nodeFuncs.h 00010 * 00011 *------------------------------------------------------------------------- 00012 */ 00013 #ifndef NODEFUNCS_H 00014 #define NODEFUNCS_H 00015 00016 #include "nodes/parsenodes.h" 00017 00018 00019 /* flags bits for query_tree_walker and query_tree_mutator */ 00020 #define QTW_IGNORE_RT_SUBQUERIES 0x01 /* subqueries in rtable */ 00021 #define QTW_IGNORE_CTE_SUBQUERIES 0x02 /* subqueries in cteList */ 00022 #define QTW_IGNORE_RC_SUBQUERIES 0x03 /* both of above */ 00023 #define QTW_IGNORE_JOINALIASES 0x04 /* JOIN alias var lists */ 00024 #define QTW_IGNORE_RANGE_TABLE 0x08 /* skip rangetable entirely */ 00025 #define QTW_EXAMINE_RTES 0x10 /* examine RTEs */ 00026 #define QTW_DONT_COPY_QUERY 0x20 /* do not copy top Query */ 00027 00028 00029 extern Oid exprType(const Node *expr); 00030 extern int32 exprTypmod(const Node *expr); 00031 extern bool exprIsLengthCoercion(const Node *expr, int32 *coercedTypmod); 00032 extern Node *relabel_to_typmod(Node *expr, int32 typmod); 00033 extern bool expression_returns_set(Node *clause); 00034 00035 extern Oid exprCollation(const Node *expr); 00036 extern Oid exprInputCollation(const Node *expr); 00037 extern void exprSetCollation(Node *expr, Oid collation); 00038 extern void exprSetInputCollation(Node *expr, Oid inputcollation); 00039 00040 extern int exprLocation(const Node *expr); 00041 00042 extern bool expression_tree_walker(Node *node, bool (*walker) (), 00043 void *context); 00044 extern Node *expression_tree_mutator(Node *node, Node *(*mutator) (), 00045 void *context); 00046 00047 extern bool query_tree_walker(Query *query, bool (*walker) (), 00048 void *context, int flags); 00049 extern Query *query_tree_mutator(Query *query, Node *(*mutator) (), 00050 void *context, int flags); 00051 00052 extern bool range_table_walker(List *rtable, bool (*walker) (), 00053 void *context, int flags); 00054 extern List *range_table_mutator(List *rtable, Node *(*mutator) (), 00055 void *context, int flags); 00056 00057 extern bool query_or_expression_tree_walker(Node *node, bool (*walker) (), 00058 void *context, int flags); 00059 extern Node *query_or_expression_tree_mutator(Node *node, Node *(*mutator) (), 00060 void *context, int flags); 00061 00062 extern bool raw_expression_tree_walker(Node *node, bool (*walker) (), 00063 void *context); 00064 00065 #endif /* NODEFUNCS_H */
1.7.1