SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Literal \'a1,a2 1\'
    Function arrayEnumerateUniqRanked (children 1)
     ExpressionList (children 2)
      Identifier a1
      Identifier a2
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier arrays_test
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier a1
    OrderByElement (children 1)
     Identifier a2