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-rw-r--r--sql/opt_range.cc3
1 files changed, 2 insertions, 1 deletions
diff --git a/sql/opt_range.cc b/sql/opt_range.cc
index c7bad3b18f3..349a5d0271c 100644
--- a/sql/opt_range.cc
+++ b/sql/opt_range.cc
@@ -798,7 +798,8 @@ static SEL_TREE *get_mm_tree(PARAM *param,COND *cond)
table_map ref_tables=cond->used_tables();
if (cond->type() != Item::FUNC_ITEM)
{ // Should be a field
- if (ref_tables & param->current_table)
+ if ((ref_tables & param->current_table) ||
+ (ref_tables & ~(param->prev_tables | param->read_tables)))
DBUG_RETURN(0);
DBUG_RETURN(new SEL_TREE(SEL_TREE::MAYBE));
}