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-rw-r--r--activerecord/lib/active_record/connection_adapters/mysql_adapter.rb4
1 files changed, 4 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
index 14b950dbb0..ea0970028c 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
@@ -491,6 +491,10 @@ module ActiveRecord
execute("RELEASE SAVEPOINT #{current_savepoint_name}")
end
+ def join_to_update(update, select) #:nodoc:
+ update.table select.ast.cores.last.source
+ end
+
# SCHEMA STATEMENTS ========================================
def structure_dump #:nodoc: