diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/utils/adt/selfuncs.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/backend/utils/adt/selfuncs.c b/src/backend/utils/adt/selfuncs.c index dcb35d89752..4af8c80848d 100644 --- a/src/backend/utils/adt/selfuncs.c +++ b/src/backend/utils/adt/selfuncs.c @@ -1797,6 +1797,15 @@ nulltestsel(PlannerInfo *root, NullTestType nulltesttype, Node *arg, return (Selectivity) 0; /* keep compiler quiet */ } } + else if (vardata.var && IsA(vardata.var, Var) && + ((Var *) vardata.var)->varattno < 0) + { + /* + * There are no stats for system columns, but we know they are never + * NULL. + */ + selec = (nulltesttype == IS_NULL) ? 0.0 : 1.0; + } else { /* |