Re: Removing unneeded self joins - Mailing list pgsql-hackers

From Andrey Lepikhov
Subject Re: Removing unneeded self joins
Date
Msg-id [email protected]
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In response to Removing unneeded self joins  (Alexander Kuzmenkov <[email protected]>)
List pgsql-hackers
On 12/3/21 14:05, Hywel Carver wrote:
> I've built and tested this, and it seems to function correctly to me. One question I have is whether the added "IS
NOTNULL" filters can be omitted when they're unnecessary. Some of the resulting plans included an "IS NOT NULL" filter
ona non-nullable column. To be clear, this is still an improvement (to me) without that.
 

New version of the feature. Deeply refactored with main goal - to reduce 
the code size) and rebased on current master.

Here I didn't work on 'unnecessary IS NOT NULL filter'.

-- 
regards,
Andrey Lepikhov
Postgres Professional

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