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Definitive answer: can functions use indexes? - Mailing list pgsql-general

From Seamus Abshere
Subject Definitive answer: can functions use indexes?
Date
Msg-id 1452122123.2259682.484964250.0BC5DCA2@webmail.messagingengine.com
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Responses Re: Definitive answer: can functions use indexes?  (Jim Nasby <Jim.Nasby@BlueTreble.com>)
Re: Definitive answer: can functions use indexes?  (Tom Lane <tgl@sss.pgh.pa.us>)
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hi,

I've been using Postgres for years ( :heart: ) and I'm still in doubt
about this. Would somebody provide an authoritative, definitive,
narrative answer?

-> Can a function like `LEFT()` use an index?

(Or do I have to find an "equivalent" operator in order to leverage
indexes?)

Thanks!
Seamus

--
Seamus Abshere, SCEA
+598 99 54 99 54
https://github.com/seamusabshere

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