regexp_replace ( string text, pattern text, replacement text ) => text.Returns captured substrings resulting from the first match of a POSIX regular expression to the string, or multiple matches if the g flag is used regexp_matches ( string text, pattern text ) => setof text.Returns captured substrings resulting from the first match of a POSIX regular expression to the string regexp_match ( string text, pattern text ) => text.substring ( string text FROM pattern text ) => textĮxtracts the first substring matching POSIX regular expression.Actually the total count was six as seen in the following section : Historically in PostgreSQL, there were a bunch of functions supporting POSIX regular expressions. Currently existing regexp functions until PostgreSQL 14 In this article, I am going to talk about new regexp functions that will be seen in PostgreSQL 15.
#Postgresql regex Patch
For this reason, I have contributed to a patch and with that, PostgreSQL 15 will include some more regexp functions. However, there are some regexp functions that are currently missing.
![postgresql regex postgresql regex](https://i.stack.imgur.com/589ld.png)
There are many regexp functions that are currently supported by PostgreSQL. One of them was while working with regular expressions.
![postgresql regex postgresql regex](https://docs.microsoft.com/en-us/azure/postgresql/media/concepts-aad-authentication/set-aad-admin.png)
At MigOps, we have migrated many customers from Oracle to PostgreSQL and I have personally seen many scenarios where direct equivalent is not possible. While migrating from other databases like Oracle to PostgreSQL, we may come across some functionalities that may be only available with a complex work-around.