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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/commands/analyze.c
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@ -862,11 +862,13 @@ examine_attribute(Relation onerel, int attnum, Node *index_expr)
{
stats->attrtypid = exprType(index_expr);
stats->attrtypmod = exprTypmod(index_expr);
stats->attrcollation = exprCollation(index_expr);
}
else
{
stats->attrtypid = attr->atttypid;
stats->attrtypmod = attr->atttypmod;
stats->attrcollation = attr->attcollation;
}
typtuple = SearchSysCache1(TYPEOID, ObjectIdGetDatum(stats->attrtypid));
@ -1929,6 +1931,7 @@ compute_minimal_stats(VacAttrStatsP stats,
track_cnt = 0;
fmgr_info(mystats->eqfunc, &f_cmpeq);
fmgr_info_collation(stats->attrcollation, &f_cmpeq);
for (i = 0; i < samplerows; i++)
{
@ -2250,6 +2253,7 @@ compute_scalar_stats(VacAttrStatsP stats,
SelectSortFunction(mystats->ltopr, false, &cmpFn, &cmpFlags);
fmgr_info(cmpFn, &f_cmpfn);
fmgr_info_collation(stats->attrcollation, &f_cmpfn);
/* Initial scan to find sortable values */
for (i = 0; i < samplerows; i++)