Apache Doris 中文技术论坛
Questions Tags Users Badges

【已解决】Doris的select count过程是怎样的?

Asked Jun 16, 2024 Modified Jun 27, 2024
Viewed 108
query

Doris的select count过程是怎样的?是直接查询的元数据吗?还是查询segment进行汇总?如何分析

edited Jun 27, 2024
JiangXiaoqiang3
asked Jun 16, 2024
1 Answers

当前dupkey是有做优化、例如直接查元数据返回,而agg和unikey模型的需要去扫文件返回。

edited Jan 1, 1970
张彬华7698
answered Jun 19, 2024
Related Questions
doris查询 CATALOG hive 数据,全量查询和分区分批查询总和数据量不一致
3 answers
doris 4.0.5疑似page cache bug
2 answers
SQL Error [1105] [HY000]: errCode =2, detailMessage= type UNSUPPORTED is unsupported for Nereids
2 answers
升级Doris4.1 集群 doris_cluster 发生 Critical (default) 告警
2 answers
分区表查询延迟
1 answers
如何通过flink cdc来实时获取doris中的数据?
1 answers

Terms of service Privacy policy

Powered by Answer - the open-source software that powers Q&A communities.
Made with love © 2026 Apache Doris 中文技术论坛.