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-rw-r--r--sql/table.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/sql/table.cc b/sql/table.cc
index cf2eb1705a5..e911d39b225 100644
--- a/sql/table.cc
+++ b/sql/table.cc
@@ -3430,6 +3430,7 @@ Field *Natural_join_column::field()
const char *Natural_join_column::table_name()
{
+ DBUG_ASSERT(table_ref);
return table_ref->alias;
}