SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 2)
    Function count (alias c) (children 1)
     ExpressionList
    Function in (alias g) (children 1)
     ExpressionList (children 2)
      Identifier x
      Literal Tuple_(\'a\', \'bb\')
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tab
   ExpressionList (children 1)
    Identifier g
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier c