3.0 version，REST return uncompleted value

[east0923]

Bug Description 调用查询sql语句，反馈的结果项中，json某些字段不完整。 SQL：SELECT last_row(*) FROM tag_64657673696d750973696d756461746109626f6f6c30

To Reproduce Steps to reproduce the behavior: 1、创建名字很长的子表（符合要求 https://docs.taosdata.com/taos-sql/table/#%E5%88%9B%E5%BB%BA%E8%A1%A8） 2、进行last_row查询

Expected Behavior res.data.column_meta 结果中的列名，应完整。但目前似乎有长度限制被截取了。

Screenshots { "code": 0, "column_meta": [ [ "last_row(tag_64657673696d750973696d756461746109626f6f6c30.ts)", "TIMESTAMP", 8 ], [ "last_row(tag_64657673696d750973696d756461746109626f6f6c30.status", "INT", 4 ], [ "last_row(tag_64657673696d750973696d756461746109626f6f6c30.valuei", "BIGINT", 8 ], [ "last_row(tag_64657673696d750973696d756461746109626f6f6c30.valuef", "DOUBLE", 8 ], [ "last_row(tag_64657673696d750973696d756461746109626f6f6c30.valueb", "BOOL", 1 ], [ "last_row(tag_64657673696d750973696d756461746109626f6f6c30.values", "VARCHAR", 1024 ] ], "data": [ [ "2022-08-29T06:18:53.354Z", null, null, null, true, null ] ], "rows": 1 }

Environment (please complete the following information):

• OS: Ubuntu 22.04
• Memory, CPU, current Disk Space
• TDengine Version [e.g. 3.0.0.1]

Additional Context Add any other context about the problem here.

[east0923]

经length测量，REST反馈的column_meta中的name长度，似乎最大是64。

[sangshuduo]

参考：https://docs.taosdata.com/taos-sql/limit/

[east0923]

参考：https://docs.taosdata.com/taos-sql/limit/

列名不超过64啊，只是REST的反馈结果里面，会把表名也拼在列名前面反馈，才导致超长的。 CREATE STABLE IF NOT EXISTS ${dbName}.tagOriginal ( ts TIMESTAMP, status INT, valueInteger BIGINT, valueFloat DOUBLE, valueBoolean BOOL, valueString BINARY(1024) ) TAGS ( edgeId nchar(128), instance nchar(256), tagName nchar(128) )

[sangshuduo]

@east0923 好的，谢谢您的 issue ，我们看一下如何解决。

[xiao-yu-wang]

在last_row(*)产生的多列输出的别名中去掉了表别名，提交版本为3.0分支d0669151af版本。