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per-column options for btree indexes. The planner's support for this is still pretty rudimentary; it does not yet know how to plan mergejoins with nondefault ordering options. The documentation is pretty rudimentary, too. I'll work on improving that stuff later. Note incompatible change from prior behavior: ORDER BY ... USING will now be rejected if the operator is not a less-than or greater-than member of some btree opclass. This prevents less-than-sane behavior if an operator that doesn't actually define a proper sort ordering is selected.
46 lines
1.8 KiB
C
46 lines
1.8 KiB
C
/*-------------------------------------------------------------------------
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*
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* parse_clause.h
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* handle clauses in parser
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*
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*
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* Portions Copyright (c) 1996-2007, 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_clause.h,v 1.48 2007/01/09 02:14:15 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PARSE_CLAUSE_H
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#define PARSE_CLAUSE_H
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#include "parser/parse_node.h"
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extern void transformFromClause(ParseState *pstate, List *frmList);
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extern int setTargetTable(ParseState *pstate, RangeVar *relation,
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bool inh, bool alsoSource, AclMode requiredPerms);
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extern bool interpretInhOption(InhOption inhOpt);
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extern bool interpretOidsOption(List *defList);
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extern Node *transformWhereClause(ParseState *pstate, Node *clause,
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const char *constructName);
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extern Node *transformLimitClause(ParseState *pstate, Node *clause,
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const char *constructName);
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extern List *transformGroupClause(ParseState *pstate, List *grouplist,
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List **targetlist, List *sortClause);
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extern List *transformSortClause(ParseState *pstate, List *orderlist,
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List **targetlist, bool resolveUnknown);
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extern List *transformDistinctClause(ParseState *pstate, List *distinctlist,
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List **targetlist, List **sortClause);
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extern List *addAllTargetsToSortList(ParseState *pstate,
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List *sortlist, List *targetlist,
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bool resolveUnknown);
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extern List *addTargetToSortList(ParseState *pstate, TargetEntry *tle,
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List *sortlist, List *targetlist,
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SortByDir sortby_dir, SortByNulls sortby_nulls,
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List *sortby_opname, bool resolveUnknown);
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extern Index assignSortGroupRef(TargetEntry *tle, List *tlist);
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extern bool targetIsInSortList(TargetEntry *tle, Oid sortop, List *sortList);
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#endif /* PARSE_CLAUSE_H */
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