| /*------------------------------------------------------------------------- |
| * |
| * parsetree.h |
| * Routines to access various components and subcomponents of |
| * parse trees. |
| * |
| * |
| * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group |
| * Portions Copyright (c) 1994, Regents of the University of California |
| * |
| * $PostgreSQL: pgsql/src/include/parser/parsetree.h,v 1.37 2009/01/01 17:24:00 momjian Exp $ |
| * |
| *------------------------------------------------------------------------- |
| */ |
| #ifndef PARSETREE_H |
| #define PARSETREE_H |
| |
| #include "nodes/parsenodes.h" |
| |
| |
| /* ---------------- |
| * range table operations |
| * ---------------- |
| */ |
| |
| /* |
| * rt_fetch |
| * |
| * NB: this will crash and burn if handed an out-of-range RT index |
| */ |
| #define rt_fetch(rangetable_index, rangetable) \ |
| ((RangeTblEntry *) list_nth(rangetable, (rangetable_index)-1)) |
| |
| /* |
| * getrelid |
| * |
| * Given the range index of a relation, return the corresponding |
| * relation OID. Note that InvalidOid will be returned if the |
| * RTE is for a non-relation-type RTE. |
| */ |
| #define getrelid(rangeindex,rangetable) \ |
| (rt_fetch(rangeindex, rangetable)->relid) |
| |
| /* |
| * Given an RTE and an attribute number, return the appropriate |
| * variable name or alias for that attribute of that RTE. |
| */ |
| extern const char *get_rte_attribute_name(RangeTblEntry *rte, AttrNumber attnum); |
| |
| /* |
| * Given an RTE and an attribute number, return the appropriate |
| * type and typemod info for that attribute of that RTE. |
| */ |
| extern void get_rte_attribute_type(RangeTblEntry *rte, AttrNumber attnum, |
| Oid *vartype, int32 *vartypmod); |
| |
| /* |
| * Check whether an attribute of an RTE has been dropped (note that |
| * get_rte_attribute_type will fail on such an attr) |
| */ |
| extern bool get_rte_attribute_is_dropped(RangeTblEntry *rte, |
| AttrNumber attnum); |
| |
| |
| /* ---------------- |
| * target list operations |
| * ---------------- |
| */ |
| |
| extern TargetEntry *get_tle_by_resno(List *tlist, AttrNumber resno); |
| |
| /* ---------------- |
| * FOR UPDATE/SHARE info |
| * ---------------- |
| */ |
| |
| extern RowMarkClause *get_rowmark(Query *qry, Index rtindex); |
| |
| #endif /* PARSETREE_H */ |