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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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3
src/include/utils/selfuncs.h
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@@ -74,6 +74,7 @@ typedef struct VariableStatData
Oid vartype; /* exposed type of expression */
Oid atttype; /* type to pass to get_attstatsslot */
int32 atttypmod; /* typmod to pass to get_attstatsslot */
Oid attcollation; /* collation of the variable */
bool isunique; /* true if matched to a unique index */
} VariableStatData;
@@ -178,7 +179,7 @@ extern Selectivity rowcomparesel(PlannerInfo *root,
int varRelid, JoinType jointype, SpecialJoinInfo *sjinfo);
extern void mergejoinscansel(PlannerInfo *root, Node *clause,
Oid opfamily, int strategy, bool nulls_first,
Oid opfamily, Oid collation, int strategy, bool nulls_first,
Selectivity *leftstart, Selectivity *leftend,
Selectivity *rightstart, Selectivity *rightend);