last_row return wrong result
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Since Feb 17, 2024.
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Description
General Questions
A general question should be related to TDengine's user's manual, user experience, milestones, business cooperations etc.
根据issue295和issue293
查询超级表下属子表的值只需要使用last_row关键字。但是我测试过程中出现了last_row返回的数据不正确的问题。
测试的过程如下
使用表名的最后四位作为小数,时间戳的毫秒作为整数生成数值,对应的时间作为时间写入到数据库中。
当我使用last_row关键字进行查询的时候发现数据居然和我生成的规则不一致,比如时间为2024-02-08 16:53:27.817表名为abcdefghijklmnopqrstuvwxyzabc0147的数据,按照生成逻辑应该是817.147,实际查询也是这样。
不过使用last_row关键字进行查询的时候可能就会出现时间与数值的逻辑不对应的结果。这里是对应的截图,子表和超级表查询都会出现这个问题。
补充:
我的集群有三台4C8G虚拟机
taos版本是3.2.2.0
使用的是springboot进行插入,可能会有多线程写入的可能。
建库语句create database kkstable CACHEMODEL 'last_row' DURATION 30 WAL_FSYNC_PERIOD 60000 KEEP 3650 REPLICA 1 VGROUPS 3 STT_TRIGGER 1
建表语句create stable kkstable.kksstable (ts timestamp,current float) TAGS (kks binary(33));
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