diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/optimizer/plan/analyzejoins.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/backend/optimizer/plan/analyzejoins.c b/src/backend/optimizer/plan/analyzejoins.c index 34317fe7782..511603b5810 100644 --- a/src/backend/optimizer/plan/analyzejoins.c +++ b/src/backend/optimizer/plan/analyzejoins.c @@ -704,6 +704,14 @@ rel_is_distinct_for(PlannerInfo *root, RelOptInfo *rel, List *clause_list) var = (Var *) get_leftop(rinfo->clause); /* + * We may ignore any RelabelType node above the operand. (There + * won't be more than one, since eval_const_expressions() has been + * applied already.) + */ + if (var && IsA(var, RelabelType)) + var = (Var *) ((RelabelType *) var)->arg; + + /* * If inner side isn't a Var referencing a subquery output column, * this clause doesn't help us. */ |