diff options
Diffstat (limited to 'sql/item_sum.cc')
| -rw-r--r-- | sql/item_sum.cc | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sql/item_sum.cc b/sql/item_sum.cc index c33088e0276..a61c5d59d67 100644 --- a/sql/item_sum.cc +++ b/sql/item_sum.cc @@ -578,7 +578,14 @@ int Item_sum::set_aggregator(Aggregator::Aggregator_type aggregator) { if (aggr) { + /* + Dependent subselects may be executed multiple times, making + set_aggregator to be called multiple times. The aggregator type + will be the same, but it needs to be reset so that it is + reevaluated with the new dependent data. + */ DBUG_ASSERT(aggregator == aggr->Aggrtype()); + aggr->clear(); return FALSE; } switch (aggregator) |