postgresql - ~~ Postgres 中的运算符

Question

我有一个查询 Postgres :

SELECT DISTINCT a.profn FROM tprof a, sap_tstc b, tgrc c 
WHERE ((c.grcid ~~ a.grcid) 
AND ((c.tcode) = (b.tcode)));

~~是什么意思？

Answer 1

来自 9.7.1. LIKE PostgreSQL 文档:

The operator ~~ is equivalent to LIKE, and ~~* corresponds to ILIKE. There are also !~~ and !~~* operators that represent NOT LIKE and NOT ILIKE, respectively. All of these operators are PostgreSQL-specific.