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80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/*-------------------------------------------------------------------------
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*
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* parsetree.h
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* Routines to access various components and subcomponents of
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* parse trees.
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*
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*
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* Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/parser/parsetree.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PARSETREE_H
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#define PARSETREE_H
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#include "nodes/parsenodes.h"
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/* ----------------
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* range table operations
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* ----------------
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*/
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/*
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* rt_fetch
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*
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* NB: this will crash and burn if handed an out-of-range RT index
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*/
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#define rt_fetch(rangetable_index, rangetable) \
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((RangeTblEntry *) list_nth(rangetable, (rangetable_index)-1))
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/*
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* getrelid
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*
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* Given the range index of a relation, return the corresponding
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* relation OID. Note that InvalidOid will be returned if the
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* RTE is for a non-relation-type RTE.
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*/
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#define getrelid(rangeindex,rangetable) \
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(rt_fetch(rangeindex, rangetable)->relid)
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/*
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* Given an RTE and an attribute number, return the appropriate
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* variable name or alias for that attribute of that RTE.
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*/
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extern char *get_rte_attribute_name(RangeTblEntry *rte, AttrNumber attnum);
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/*
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* Given an RTE and an attribute number, return the appropriate
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* type and typemod info for that attribute of that RTE.
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*/
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extern void get_rte_attribute_type(RangeTblEntry *rte, AttrNumber attnum,
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Oid *vartype, int32 *vartypmod, Oid *varcollid);
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/*
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* Check whether an attribute of an RTE has been dropped (note that
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* get_rte_attribute_type will fail on such an attr)
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*/
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extern bool get_rte_attribute_is_dropped(RangeTblEntry *rte,
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AttrNumber attnum);
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/* ----------------
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* target list operations
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* ----------------
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*/
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extern TargetEntry *get_tle_by_resno(List *tlist, AttrNumber resno);
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/* ----------------
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* FOR UPDATE/SHARE info
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* ----------------
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*/
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extern RowMarkClause *get_parse_rowmark(Query *qry, Index rtindex);
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#endif /* PARSETREE_H */
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