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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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16
src/backend/parser/parse_oper.c
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@ -782,6 +782,7 @@ make_op(ParseState *pstate, List *opname, Node *ltree, Node *rtree,
List *args;
Oid rettype;
OpExpr *result;
Oid opcollid;
/* Select the operator */
if (rtree == NULL)
@ -861,6 +862,12 @@ make_op(ParseState *pstate, List *opname, Node *ltree, Node *rtree,
/* perform the necessary typecasting of arguments */
make_fn_arguments(pstate, args, actual_arg_types, declared_arg_types);
/* XXX: If we knew which functions required collation information,
* we could selectively set the last argument to true here. */
opcollid = select_common_collation(pstate, args, false);
if (!OidIsValid(opcollid))
opcollid = get_typcollation(rettype);
/* and build the expression node */
result = makeNode(OpExpr);
result->opno = oprid(tup);
@ -868,6 +875,7 @@ make_op(ParseState *pstate, List *opname, Node *ltree, Node *rtree,
result->opresulttype = rettype;
result->opretset = get_func_retset(opform->oprcode);
result->args = args;
result->collid = opcollid;
result->location = location;
ReleaseSysCache(tup);
@ -896,6 +904,7 @@ make_scalar_array_op(ParseState *pstate, List *opname,
List *args;
Oid rettype;
ScalarArrayOpExpr *result;
Oid opcollid;
ltypeId = exprType(ltree);
atypeId = exprType(rtree);
@ -990,12 +999,19 @@ make_scalar_array_op(ParseState *pstate, List *opname,
/* perform the necessary typecasting of arguments */
make_fn_arguments(pstate, args, actual_arg_types, declared_arg_types);
/* XXX: If we knew which functions required collation information,
* we could selectively set the last argument to true here. */
opcollid = select_common_collation(pstate, args, false);
if (!OidIsValid(opcollid))
opcollid = get_typcollation(rettype);
/* and build the expression node */
result = makeNode(ScalarArrayOpExpr);
result->opno = oprid(tup);
result->opfuncid = opform->oprcode;
result->useOr = useOr;
result->args = args;
result->collid = opcollid;
result->location = location;
ReleaseSysCache(tup);