Re: pg_stat_statements query normalization, and the 'in' operator

unixway(dot)drive(at)gmail(dot)com writes:
> Given the following list of queries:

> create table foo (id serial, bar integer);
> select * from foo where id in (1);
> select * from foo where id in (2,3);
> select * from foo where id in (1,3,5);
> select * from foo where id in (select id from foo);

> would it be possible to have first three select queries to be normalized
> into a single one so that 'select query from pg_stat_statements' returns
> something like:

> select * from foo where id in (...);
> select * from foo where id in (select id from foo);

Wouldn't recommend holding your breath for that. But you could do the
same conversion on the client side that the parser would do anyway:

select * from foo where id = any ('{1,3,5}'::integer[]);

regards, tom lane