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-rw-r--r--sql/opt_sum.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/opt_sum.cc b/sql/opt_sum.cc
index 44df305cb35..55efcce1c19 100644
--- a/sql/opt_sum.cc
+++ b/sql/opt_sum.cc
@@ -131,7 +131,7 @@ int opt_sum_query(TABLE_LIST *tables, List<Item> &all_fields,COND *conds)
for (table= tables; table; table= table->next_leaf)
{
if (outer_tables || (table->table->file->table_flags() &
- HA_NOT_EXACT_COUNT))
+ HA_NOT_EXACT_COUNT) || table->schema_table)
{
const_result= 0; // Can't optimize left join
break;