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Per-column collation support

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This adds collation support for columns and domains, a COLLATE clause
to override it per expression, and B-tree index support.

Peter Eisentraut
reviewed by Pavel Stehule, Itagaki Takahiro, Robert Haas, Noah Misch
This commit is contained in:
Peter Eisentraut
2011-02-08 23:04:18 +02:00
parent 1703f0e8da
commit 414c5a2ea6
156 changed files with 4519 additions and 582 deletions
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4
src/backend/executor/nodeMergejoin.c
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@ -180,6 +180,7 @@ typedef enum
static MergeJoinClause
MJExamineQuals(List *mergeclauses,
Oid *mergefamilies,
Oid *mergecollations,
int *mergestrategies,
bool *mergenullsfirst,
PlanState *parent)
@ -197,6 +198,7 @@ MJExamineQuals(List *mergeclauses,
OpExpr *qual = (OpExpr *) lfirst(cl);
MergeJoinClause clause = &clauses[iClause];
Oid opfamily = mergefamilies[iClause];
Oid collation = mergecollations[iClause];
StrategyNumber opstrategy = mergestrategies[iClause];
bool nulls_first = mergenullsfirst[iClause];
int op_strategy;
@ -240,6 +242,7 @@ MJExamineQuals(List *mergeclauses,
/* Set up the fmgr lookup information */
fmgr_info(cmpproc, &(clause->cmpfinfo));
fmgr_info_collation(collation, &(clause->cmpfinfo));
/* Fill the additional comparison-strategy flags */
if (opstrategy == BTLessStrategyNumber)
@ -1636,6 +1639,7 @@ ExecInitMergeJoin(MergeJoin *node, EState *estate, int eflags)
mergestate->mj_NumClauses = list_length(node->mergeclauses);
mergestate->mj_Clauses = MJExamineQuals(node->mergeclauses,
node->mergeFamilies,
node->mergeCollations,
node->mergeStrategies,
node->mergeNullsFirst,
(PlanState *) mergestate);