1 SET 2.0+ , 2.0 variable = 2.0.1 expression 2.0.1 NULL 2.0.1 DEFAULT 2.0 ( 2.0.1+ , 2.0.1 variable 2.0.2 ) = ( 2.0.2.1.0.0+ , 2.0.2.1.0.0 expression 2.0.2.1.0.0 NULL 2.0.2.1.0.0 DEFAULT 2.0.2.1.0 row-fullselect 2.0.2.2 ) row-fullselect 1? WITH 1.1? RECURSIVE 1.2+ , 1.2 common-table-expression 1.2.1 fullselect