SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (alias wrap) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 4)
          ExpressionList (children 2)
           Subquery (alias keys) (children 1)
            SelectWithUnionQuery (children 1)
             ExpressionList (children 1)
              SelectQuery (children 2)
               ExpressionList (children 1)
                Function groupArray (children 1)
                 ExpressionList (children 1)
                  Identifier a
               TablesInSelectQuery (children 1)
                TablesInSelectQueryElement (children 1)
                 TableExpression (children 1)
                  Subquery (children 1)
                   SelectWithUnionQuery (children 1)
                    ExpressionList (children 1)
                     SelectQuery (children 1)
                      ExpressionList (children 1)
                       Literal UInt64_1 (alias a)
           Subquery (alias values) (children 1)
            SelectWithUnionQuery (children 1)
             ExpressionList (children 1)
              SelectQuery (children 2)
               ExpressionList (children 1)
                Function groupArray (children 1)
                 ExpressionList (children 1)
                  Identifier a
               TablesInSelectQuery (children 1)
                TablesInSelectQueryElement (children 1)
                 TableExpression (children 1)
                  Subquery (children 1)
                   SelectWithUnionQuery (children 1)
                    ExpressionList (children 1)
                     SelectQuery (children 1)
                      ExpressionList (children 1)
                       Literal UInt64_2 (alias a)
          ExpressionList (children 1)
           Asterisk
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Subquery (children 1)
              SelectWithUnionQuery (children 1)
               ExpressionList (children 1)
                SelectQuery (children 1)
                 ExpressionList (children 1)
                  Literal UInt64_1 (alias a)
          Function transform (children 1)
           ExpressionList (children 4)
            Identifier a
            Identifier keys
            Identifier values
            Literal UInt64_0