SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function arrayElement (alias col1) (children 1)
     ExpressionList (children 2)
      Identifier a
      Literal \'k1\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier table_map
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier col1
