<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[qq_20181263的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/qq_20181263</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; qq_20181263]]></copyright><item><title><![CDATA[如何在VI编辑器中批量加#注释？]]></title><link>https://blog.youkuaiyun.com/qq_20181263/article/details/153062679</link><guid>https://blog.youkuaiyun.com/qq_20181263/article/details/153062679</guid><author>qq_20181263</author><pubDate>Sat, 11 Oct 2025 18:25:16 +0800</pubDate><description><![CDATA[如何在VI编辑器中批量加#注释？]]></description><category></category></item><item><title><![CDATA[Java编写九九乘法表（高难度）]]></title><link>https://blog.youkuaiyun.com/qq_20181263/article/details/141069253</link><guid>https://blog.youkuaiyun.com/qq_20181263/article/details/141069253</guid><author>qq_20181263</author><pubDate>Fri, 09 Aug 2024 18:50:11 +0800</pubDate><description><![CDATA[【代码】Java编写九九乘法表（高难度）]]></description><category></category></item><item><title><![CDATA[Doris的Join优化]]></title><link>https://blog.youkuaiyun.com/qq_20181263/article/details/138564473</link><guid>https://blog.youkuaiyun.com/qq_20181263/article/details/138564473</guid><author>qq_20181263</author><pubDate>Wed, 08 May 2024 11:21:57 +0800</pubDate><description><![CDATA[如果一个 A 表经常需要用某个固定字段 K，来跟 B 表进行关联查询，则我们可以把 K 定义为 A 表的分桶字段，这样一来，当 Join 的等值表达式命中了 A 的数据分布列，Doris 底层就会将 Join 的执行计划解析为：Bukect shuffle join。则，这些表的桶数都相同，桶中的数据都按照join条件列拥有相同的数据分布规律，且各表的相同桶号的桶都会落在相同的BE节点上；（那么，这些表的相同桶号的桶，就会被存放在相同的BE节点上，JOIN时完全不需要网络传输）。]]></description><category></category></item><item><title><![CDATA[Elastic Search原理：什么是倒排索引？]]></title><link>https://blog.youkuaiyun.com/qq_20181263/article/details/138550697</link><guid>https://blog.youkuaiyun.com/qq_20181263/article/details/138550697</guid><author>qq_20181263</author><pubDate>Wed, 08 May 2024 00:32:52 +0800</pubDate><description><![CDATA[记录词条所在的文档ID，查询词条时，直接查询改词条的文档ID，然后得到该文档（该条数据）。答：基于表中字段（往往为主键ID）创建的索引，若想查询。，必须去做全表匹配，并且使用。问：什么是正向索引？问：什么是倒排索引？]]></description><category></category></item><item><title><![CDATA[Hive查询报错：FAILED:Execution Error，return code 2 from org.apache.hadoop.hive.ql.exec.mr.MapRedTask]]></title><link>https://blog.youkuaiyun.com/qq_20181263/article/details/137978515</link><guid>https://blog.youkuaiyun.com/qq_20181263/article/details/137978515</guid><author>qq_20181263</author><pubDate>Fri, 19 Apr 2024 21:52:14 +0800</pubDate><description><![CDATA[在Linux命令行中泡HiveSQL统计行数，但每次统计出来都为0，后来发现是查询语句压根就没执行。]]></description><category></category></item><item><title><![CDATA[Vmware下Ubuntu安装Vmware tools分辨率/屏幕显示不全问题]]></title><link>https://blog.youkuaiyun.com/qq_20181263/article/details/129301796</link><guid>https://blog.youkuaiyun.com/qq_20181263/article/details/129301796</guid><author>qq_20181263</author><pubDate>Thu, 02 Mar 2023 15:37:35 +0800</pubDate><description><![CDATA[解决VMware下Ubuntu分辨率问题 / 点不到分辨率应用按钮 / 安装VMware Tools]]></description><category></category></item></channel></rss>