diff options
Diffstat (limited to 'src/backend/optimizer/util/tlist.c')
| -rw-r--r-- | src/backend/optimizer/util/tlist.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/backend/optimizer/util/tlist.c b/src/backend/optimizer/util/tlist.c index 14d1c67a940..bb3b7969f26 100644 --- a/src/backend/optimizer/util/tlist.c +++ b/src/backend/optimizer/util/tlist.c @@ -504,6 +504,31 @@ extract_grouping_ops(List *groupClause) } /* + * extract_grouping_collations - make an array of the grouping column collations + * for a SortGroupClause list + */ +Oid * +extract_grouping_collations(List *groupClause, List *tlist) +{ + int numCols = list_length(groupClause); + int colno = 0; + Oid *grpCollations; + ListCell *glitem; + + grpCollations = (Oid *) palloc(sizeof(Oid) * numCols); + + foreach(glitem, groupClause) + { + SortGroupClause *groupcl = (SortGroupClause *) lfirst(glitem); + TargetEntry *tle = get_sortgroupclause_tle(groupcl, tlist); + + grpCollations[colno++] = exprCollation((Node *) tle->expr); + } + + return grpCollations; +} + +/* * extract_grouping_cols - make an array of the grouping column resnos * for a SortGroupClause list */ |