[Dbix-class] Using Postgres JSONB operators in queries

[Augustus Saunders]

Interesting, thanks for the information. I hadn't realized that you could use $1, $2 etc at the DBI/bind level. I do have queries where the same value is repeated, so that should be helpful regardless of the ? class of operators.

Augustus

On Dec 16, 2014, at 8:19 PM, Darren Duncan <darren at darrenduncan.net> wrote:

> On 2014-12-04 3:38 PM, Augustus Saunders wrote:
>> Hi all, I have been unable to find a way to use some of the new JSONB operators
>> in Postgres 9.4 with DBIx::Class. A quick search for JSONB on the email archive
>> site didn’t turn up any results, so I thought I would ask.
>> 
>> In particular, ?, ?&, and ?| are now operators, and we run into problems with
>> the DBI placeholder being ?. I read that putting single quotes around the
>> question mark would allow a literal question mark in DBI, but I can’t seem to
>> make this work from DBIx::Class. Can anybody tell me whether this is currently
>> possible, if so how, and if not what might be involved or where in the code to
>> look? Thanks-
> 
> At the DBI level anyway, you can use this:
> 
> http://search.cpan.org/dist/DBD-Pg/Pg.pm#pg_placeholder_dollaronly_(boolean)
> 
> If you set that DBD::Pg option, then literal ? are not treated as placeholders and you instead have to use other forms like $1,$2 etc or named placeholders; on the plus side, those also let you use the same placeholder more than once in a statement rather than having to pass in the same bind value multiple times.
> 
> This being said, I don't know if DBIx::Class is compatible with that way of using PostgreSQL, not that this can't change.
> 
> -- Darren Duncan
> 
> 
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