SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Literal UInt64_1 (alias c0)
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (alias T0) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 1)
           Identifier C.字段 (alias 字段)
          TablesInSelectQuery (children 3)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Subquery (alias A) (children 1)
              SelectWithUnionQuery (children 1)
               ExpressionList (children 1)
                SelectQuery (children 1)
                 ExpressionList (children 1)
                  Literal UInt64_2 (alias bb)
           TablesInSelectQueryElement (children 2)
            TableExpression (children 1)
             Subquery (alias C) (children 1)
              SelectWithUnionQuery (children 1)
               ExpressionList (children 1)
                SelectQuery (children 1)
                 ExpressionList (children 1)
                  Literal \'1\' (alias 字段)
            TableJoin (children 1)
             Function equals (children 1)
              ExpressionList (children 2)
               Literal UInt64_1
               Literal UInt64_1
           TablesInSelectQueryElement (children 2)
            TableExpression (children 1)
             Subquery (alias D) (children 1)
              SelectWithUnionQuery (children 1)
               ExpressionList (children 1)
                SelectQuery (children 1)
                 ExpressionList (children 1)
                  Literal UInt64_1 (alias a)
            TableJoin (children 1)
             Function equals (children 1)
              ExpressionList (children 2)
               Literal UInt64_1
               Literal UInt64_1
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier T0.字段
     Literal \'1\'
