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6cef5d2549
qualified operator names directly, for example CREATE OPERATOR myschema.+ ( ... ). To qualify an operator name in an expression you need to write OPERATOR(myschema.+) (thanks to Peter for suggesting an escape hatch). I also took advantage of having to reformat pg_operator to fix something that'd been bugging me for a while: mergejoinable operators should have explicit links to the associated cross-data-type comparison operators, rather than hardwiring an assumption that they are named < and >.
66 lines
2.4 KiB
C
66 lines
2.4 KiB
C
/*-------------------------------------------------------------------------
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*
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* parse_node.h
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*
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*
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* Portions Copyright (c) 1996-2001, 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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* $Id: parse_node.h,v 1.30 2002/04/16 23:08:12 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PARSE_NODE_H
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#define PARSE_NODE_H
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#include "nodes/parsenodes.h"
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#include "utils/rel.h"
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/*
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* State information used during parse analysis
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*
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* p_rtable: list of RTEs that will become the rangetable of the query.
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* Note that neither relname nor refname of these entries are necessarily
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* unique; searching the rtable by name is a bad idea.
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*
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* p_joinlist: list of join items (RangeTblRef and JoinExpr nodes) that
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* will become the fromlist of the query's top-level FromExpr node.
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*
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* p_namespace: list of join items that represents the current namespace
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* for table and column lookup. This may be just a subset of the rtable +
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* joinlist, and/or may contain entries that are not yet added to the main
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* joinlist. Note that an RTE that is present in p_namespace, but does not
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* have its inFromCl flag set, is accessible only with an explicit qualifier;
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* lookups of unqualified column names should ignore it.
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*/
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typedef struct ParseState
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{
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struct ParseState *parentParseState; /* stack link */
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List *p_rtable; /* range table so far */
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List *p_joinlist; /* join items so far (will become FromExpr
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* node's fromlist) */
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List *p_namespace; /* current lookup namespace (join items) */
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int p_last_resno; /* last targetlist resno assigned */
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List *p_forUpdate; /* FOR UPDATE clause, if any (see gram.y) */
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bool p_hasAggs;
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bool p_hasSubLinks;
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bool p_is_insert;
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bool p_is_update;
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Relation p_target_relation;
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RangeTblEntry *p_target_rangetblentry;
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} ParseState;
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extern ParseState *make_parsestate(ParseState *parentParseState);
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extern Expr *make_op(List *opname, Node *ltree, Node *rtree);
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extern Node *make_operand(Node *tree, Oid orig_typeId, Oid target_typeId);
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extern Var *make_var(ParseState *pstate, RangeTblEntry *rte, int attrno);
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extern ArrayRef *transformArraySubscripts(ParseState *pstate,
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Node *arrayBase,
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Oid arrayType,
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List *indirection,
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bool forceSlice,
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Node *assignFrom);
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extern Const *make_const(Value *value);
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#endif /* PARSE_NODE_H */
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