postgre ~模糊查询慢解决方式

时间 2019-12-04

标签 postgre 模糊查询解决方式繁體版

原文原文链接

工做中遇到个状况sql

sql以下：函数

SELECT org.id orgid,org."path" 
FROM (
    SELECT * FROM   A
    INNER JOIN t_org  org ON ...
    INNER JOIN C org ON ...
    INNER JOIN D b ON ...
    INNER JOIN E bsns ON ...
    LEFT JOIN F logopttp    ON  ...    
    LEFT JOIN G sysopttp    ON  ...
WHERE 1 = 1
   -- AND org.PATH ~ '(/177412/)';-- 加上这一行，时间12s，去掉以后0.3s,怀疑是由于模糊查询致使了全表扫描

解决方式：1.给须要查询快的字段加上gin索引spa

2. 用position函数，替代模糊查询code

SELECT org.id orgid,org."path" 
FROM (
    SELECT * FROM   A
    INNER JOIN t_org  org ON ...
    INNER JOIN C org ON ...
    INNER JOIN D b ON ...
    INNER JOIN E bsns ON ...
    LEFT JOIN F logopttp    ON  ...    
    LEFT JOIN G sysopttp    ON  ...
WHERE 1 = 1
   AND position('/177412/' in org.path)>0；-- 这样的写法不致使全表扫描