SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tab_x
   Function in (children 1)
    ExpressionList (children 2)
     Identifier s
     Literal Tuple_(\'x Alick a01 y\', \'x Alick a06 y\')
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier k