Re: limitation using LIKE on ANY(array)

Thank you very much, Tom. We'll try it and report if there is any
significant impact performance-wise.

Best regards,
KC.

At 00:25 06/03/25, Tom Lane wrote:
>K C Lau <kclau60(at)netvigator(dot)com> writes:
> > Indeed, I get rejected even with:
> > .. WHERE ANY(array) = 'xx'
>
> > It would only work as documented in the manual (8.10.5):
> > SELECT * FROM sal_emp WHERE 10000 = ANY (pay_by_quarter);
>
>That's not changing any time soon; the SQL spec defines only the second
>syntax for ANY, and I believe there would be syntactic ambiguity if we
>tried to allow the other.
>
> > With 8.1.3, I get an error when trying to do this on a Text[] column :
> > .. WHERE ANY(array) LIKE 'xx%'
>
>If you're really intent on doing that, make an operator for "reverse
>LIKE" and use it with the ANY on the right-hand side.
>
>regression=# create function rlike(text,text) returns bool as
>regression-# 'select $2 like $1' language sql strict immutable;
>CREATE FUNCTION
>regression=# create operator ~~~ (procedure = rlike, leftarg = text,
>regression(# rightarg = text, commutator = ~~);
>CREATE OPERATOR
>regression=# select 'xx%' ~~~ any(array['aaa','bbb']);
> ?column?
>----------
> f
>(1 row)
>
>regression=# select 'xx%' ~~~ any(array['aaa','xxb']);
> ?column?
>----------
> t
>(1 row)
>
>regression=#
>
> regards, tom lane