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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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src/include/nodes/nodeFuncs.h
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@@ -27,6 +27,8 @@
extern Oid exprType(Node *expr);
extern int32 exprTypmod(Node *expr);
extern Oid exprCollation(Node *expr);
extern Oid coercion_expression_result_collation(Oid resulttype, Node *arg);
extern bool exprIsLengthCoercion(Node *expr, int32 *coercedTypmod);
extern bool expression_returns_set(Node *clause);