diff --git a/mysql_fdw.c b/mysql_fdw.c
index 4698658..6d3b85f 100644
--- a/mysql_fdw.c
+++ b/mysql_fdw.c
@@ -1701,7 +1701,7 @@ mysqlPlanForeignModify(PlannerInfo *root,
 	}
 
 	if (plan->returningLists)
-		ereport(ERROR,
+		ereport(WARNING,
 				(errcode(ERRCODE_FDW_UNABLE_TO_CREATE_EXECUTION),
 				 errmsg("RETURNING is not supported by this FDW")));
 
diff --git a/mysql_fdw_pushdown.config b/mysql_fdw_pushdown.config
index 6dfbd07..a673084 100644
--- a/mysql_fdw_pushdown.config
+++ b/mysql_fdw_pushdown.config
@@ -79,6 +79,7 @@ ROUTINE pg_catalog."numeric"(bigint)
 ROUTINE pg_catalog."numeric"(integer)
 ROUTINE pg_catalog."numeric"(double precision)
 ROUTINE pg_catalog."numeric"(smallint)
+OPERATOR pg_catalog.=(bigint,bigint)
 OPERATOR pg_catalog.=(integer,integer)
 OPERATOR pg_catalog.=(text,text)
 OPERATOR pg_catalog.=(smallint,integer)