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/*-------------------------------------------------------------------------
*
* parse_node.h
*
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_node.h,v 1.27 2001/10/25 05:50:08 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PARSE_NODE_H
#define PARSE_NODE_H
#include "nodes/parsenodes.h"
#include "utils/rel.h"
/*
* State information used during parse analysis
*
* p_rtable: list of RTEs that will become the rangetable of the query.
* Note that neither relname nor refname of these entries are necessarily
* unique; searching the rtable by name is a bad idea.
*
* p_joinlist: list of join items (RangeTblRef and JoinExpr nodes) that
* will become the fromlist of the query's top-level FromExpr node.
*
* p_namespace: list of join items that represents the current namespace
* for table and column lookup. This may be just a subset of the rtable +
* joinlist, and/or may contain entries that are not yet added to the main
* joinlist. Note that an RTE that is present in p_namespace, but does not
* have its inFromCl flag set, is accessible only with an explicit qualifier;
* lookups of unqualified column names should ignore it.
*/
typedef struct ParseState
{
struct ParseState *parentParseState; /* stack link */
List *p_rtable; /* range table so far */
List *p_joinlist; /* join items so far (will become FromExpr
* node's fromlist) */
List *p_namespace; /* current lookup namespace (join items) */
int p_last_resno; /* last targetlist resno assigned */
List *p_forUpdate; /* FOR UPDATE clause, if any (see gram.y) */
bool p_hasAggs;
bool p_hasSubLinks;
bool p_is_insert;
bool p_is_update;
Relation p_target_relation;
RangeTblEntry *p_target_rangetblentry;
} ParseState;
extern ParseState *make_parsestate(ParseState *parentParseState);
extern Expr *make_op(char *opname, Node *ltree, Node *rtree);
extern Node *make_operand(char *opname, Node *tree,
Oid orig_typeId, Oid target_typeId);
extern Var *make_var(ParseState *pstate, RangeTblEntry *rte, int attrno);
extern ArrayRef *transformArraySubscripts(ParseState *pstate,
Node *arrayBase,
Oid arrayType,
List *indirection,
bool forceSlice,
Node *assignFrom);
extern Const *make_const(Value *value);
#endif /* PARSE_NODE_H */
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