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