<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>函数 on 老冯云数</title><link>https://vonng.com/tags/%E5%87%BD%E6%95%B0/</link><description>Recent content in 函数 on 老冯云数</description><generator>Hugo -- gohugo.io</generator><language>zh-cn</language><managingEditor>rh@vonng.com (冯若航)</managingEditor><webMaster>rh@vonng.com (冯若航)</webMaster><copyright>© 2025 冯若航</copyright><lastBuildDate>Fri, 06 Apr 2018 00:00:00 +0000</lastBuildDate><atom:link href="https://vonng.com/tags/%E5%87%BD%E6%95%B0/index.xml" rel="self" type="application/rss+xml"/><item><title>函数易变性等级分类</title><link>https://vonng.com/pg/sql-func-volatility/</link><pubDate>Fri, 06 Apr 2018 00:00:00 +0000</pubDate><author>rh@vonng.com (冯若航)</author><guid>https://vonng.com/pg/sql-func-volatility/</guid><description>PgSQL中的函数默认有三种易变性等级，合理使用可以显著改善性能。</description><media:content xmlns:media="http://search.yahoo.com/mrss/" url="https://vonng.com/pg/sql-func-volatility/featured.jpg"/></item></channel></rss>