<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[sinat_35222741的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/sinat_35222741</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; sinat_35222741]]></copyright><item><title><![CDATA[MySQL5.6的索引条件下推]]></title><link>https://blog.youkuaiyun.com/sinat_35222741/article/details/129163880</link><guid>https://blog.youkuaiyun.com/sinat_35222741/article/details/129163880</guid><author>sinat_35222741</author><pubDate>Wed, 22 Feb 2023 16:08:01 +0800</pubDate><description><![CDATA[索引条件下推]]></description><category></category></item><item><title><![CDATA[发展史-硬件/数据存储/软件/网络]]></title><link>https://blog.youkuaiyun.com/sinat_35222741/article/details/128942560</link><guid>https://blog.youkuaiyun.com/sinat_35222741/article/details/128942560</guid><author>sinat_35222741</author><pubDate>Wed, 08 Feb 2023 20:10:44 +0800</pubDate><description><![CDATA[计算机发展史-硬件/数据存储/软件/网络]]></description><category></category></item><item><title><![CDATA[MySQL-JSON中文乱码解决]]></title><link>https://blog.youkuaiyun.com/sinat_35222741/article/details/120894965</link><guid>https://blog.youkuaiyun.com/sinat_35222741/article/details/120894965</guid><author>sinat_35222741</author><pubDate>Thu, 21 Oct 2021 21:07:17 +0800</pubDate><description><![CDATA[&lt;dependency&gt;
            &lt;groupId&gt;mysql&lt;/groupId&gt;
            &lt;artifactId&gt;mysql-connector-java&lt;/artifactId&gt;
            &lt;version&gt;${mysql-connector-java.version}&lt;/version&gt;
            &lt;scope&gt;provided&l...]]></description><category></category></item><item><title><![CDATA[Elasticsearch 时间格式]]></title><link>https://blog.youkuaiyun.com/sinat_35222741/article/details/120827137</link><guid>https://blog.youkuaiyun.com/sinat_35222741/article/details/120827137</guid><author>sinat_35222741</author><pubDate>Mon, 18 Oct 2021 16:43:34 +0800</pubDate><description><![CDATA[简单总结一下工作中遇到的问题：

JSON没有date类型，date在Elasticsearch中可以是以下方式：

包含日期信息的字符串，比如"2015-01-01"或者"2015/01/01 12:10:30"
long型时间戳，毫秒
integer时间戳，秒

而在es内部，时间会被转换成UTC的long型时间戳(如果指定时区的话)
同时在range query查询的时候，均是转成long型时间戳进行比较的，而聚合结果会转换回这个field定义的字符串
问题1：
背景：将对象转成JSON时，对日期加注]]></description><category></category></item></channel></rss>