实时数仓 Hologres索引的相关内容

[帮助文档] 基于hg_table_info表进行表索引诊断

统计信息日志表（hologres.hg_table_info）用于收集实例中表的相关元数据，包括创建时间、存储量等信息，以便业务对表做精细化治理。基于hg_table_info表，Hologres提供了表索引诊断功能，通过对表的索引（存储模式、索引设置）等不同维度的元数据进行诊断，帮助业务更加高效的...

实时数仓Hologres 干货20讲

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[帮助文档] 在Hologres中创建表和索引_实时数仓 Hologres(Hologres)

表是存储和组织数据的基本单位，合理地创建表、设置表索引及属性，可以为您提供高效的数据处理和分析能力。本文为您介绍在Hologres中的建表语法、设置索引和HoloWeb可视化建表。

Hologres子查询会导致无法命中索引加速吗？

Hologres子查询会导致无法命中索引加速吗？如图我的主表是有索引的，但是就是无法命中加速

Hologres有没有索引的方案，或者能不能增加主键，主要是优化join效率？

Hologres如果我只是优化join的性能，建议用哪种索引，不需要重新建表的？

Hologres是不是只要有函数计算的，都会走列存索引？

Hologres是不是只要有函数计算的，都会走列存索引？通过行的逐渐索引，很快就能找到这行数据。上例的情况，如果不能走行存索引，更新的性能上不去

Hologres是因为这个条件导致jsonb类型走了pk的索引吗？

Hologres建表字符串默认都是bitmap索引，如果字符串的是高基数的，会不会有影响？

Hologres建表字符串默认都是bitmap索引，如果字符串的是高基数的，会不会有影响？我不太明白如果有影响的话，为什么要默认创建？就是说影响存储，对查询还是有帮助的

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更新时间 2024-04-16 05:53:13

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