From: | Jim Nasby <Jim(dot)Nasby(at)BlueTreble(dot)com> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Peter Geoghegan <pg(at)heroku(dot)com> |
Cc: | Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Revisiting pg_stat_statements and IN() (Was: Re: pg_stat_statements fingerprinting logic and ArrayExpr) |
Date: | 2015-11-25 01:39:07 |
Message-ID: | 5655113B.6090406@BlueTreble.com |
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Thread: | |
Lists: | pgsql-hackers |
On 11/24/15 1:29 PM, Tom Lane wrote:
> So I suspect the real problem here is that we might want all of these
> things to look identical to pg_stat_statements:
>
> ARRAY[$1, $2, 42]
> ARRAY[$1, $2, $3, 47]
> '{1,2,3,47}'::int[]
>
> Don't see a very clean way to do that ...
Another not-uncommon case is IN ( '1', '2', ... , '2342' ); in other
words, treating an integer as text. A lot of frameworks like to do that
and just push the problem onto the database. I'm not sure what
pg_stat_statements would ultimately see in that case..
Since there's a few different things people might want, maybe a good
first step is to allow extending/changing the jumbling decision at the C
level. That would make it easy for a knowledgeable enough person to come
up with an alternative as a plugin that regular users could use.
--
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
Data in Trouble? Get it in Treble! http://BlueTreble.com
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