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are sought first as local FROM columns, then as local SELECT-list aliases, and finally as outer FROM columns; the former behavior made outer FROM columns take precedence over aliases. This does not change spec conformance because SQL99 allows only the first case anyway, and it seems more useful and self-consistent. Per gripe from Dennis Bjorklund 2004-04-05.
77 lines
2.7 KiB
C
77 lines
2.7 KiB
C
/*-------------------------------------------------------------------------
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*
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* parse_relation.h
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* prototypes for parse_relation.c.
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*
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*
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* Portions Copyright (c) 1996-2003, 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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* $PostgreSQL: pgsql/src/include/parser/parse_relation.h,v 1.44 2004/04/18 18:12:58 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PARSE_RELATION_H
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#define PARSE_RELATION_H
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#include "parser/parse_node.h"
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extern bool add_missing_from;
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extern RangeTblEntry *refnameRangeTblEntry(ParseState *pstate,
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const char *schemaname,
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const char *refname,
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int *sublevels_up);
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extern void checkNameSpaceConflicts(ParseState *pstate, Node *namespace1,
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Node *namespace2);
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extern int RTERangeTablePosn(ParseState *pstate,
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RangeTblEntry *rte,
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int *sublevels_up);
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extern RangeTblEntry *GetRTEByRangeTablePosn(ParseState *pstate,
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int varno,
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int sublevels_up);
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extern Node *scanRTEForColumn(ParseState *pstate, RangeTblEntry *rte,
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char *colname);
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extern Node *colNameToVar(ParseState *pstate, char *colname, bool localonly);
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extern Node *qualifiedNameToVar(ParseState *pstate,
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char *schemaname,
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char *refname,
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char *colname,
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bool implicitRTEOK);
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extern RangeTblEntry *addRangeTableEntry(ParseState *pstate,
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RangeVar *relation,
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Alias *alias,
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bool inh,
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bool inFromCl);
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extern RangeTblEntry *addRangeTableEntryForRelation(ParseState *pstate,
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Oid relid,
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Alias *alias,
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bool inh,
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bool inFromCl);
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extern RangeTblEntry *addRangeTableEntryForSubquery(ParseState *pstate,
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Query *subquery,
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Alias *alias,
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bool inFromCl);
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extern RangeTblEntry *addRangeTableEntryForFunction(ParseState *pstate,
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char *funcname,
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Node *funcexpr,
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RangeFunction *rangefunc,
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bool inFromCl);
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extern RangeTblEntry *addRangeTableEntryForJoin(ParseState *pstate,
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List *colnames,
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JoinType jointype,
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List *aliasvars,
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Alias *alias,
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bool inFromCl);
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extern void addRTEtoQuery(ParseState *pstate, RangeTblEntry *rte,
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bool addToJoinList, bool addToNameSpace);
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extern RangeTblEntry *addImplicitRTE(ParseState *pstate, RangeVar *relation);
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extern void expandRTE(ParseState *pstate, RangeTblEntry *rte,
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List **colnames, List **colvars);
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extern List *expandRelAttrs(ParseState *pstate, RangeTblEntry *rte);
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extern int attnameAttNum(Relation rd, const char *attname, bool sysColOK);
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extern Name attnumAttName(Relation rd, int attid);
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extern Oid attnumTypeId(Relation rd, int attid);
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#endif /* PARSE_RELATION_H */
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