CreateQuery tuple (children 3)
 Identifier tuple
 Storage definition (children 1)
  Function Memory
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 1)
    ExpressionList (children 1)
     Function CAST (alias j) (children 1)
      ExpressionList (children 2)
       Literal Tuple_(UInt64_1, \'Test\')
       Literal \'Tuple(a Int8,  b String)\'