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List:       pgsql-performance
Subject:    Re: [PERFORM] Dynamic queries in stored procedure
From:       Scott Barney <scott () calculatedsteam ! com>
Date:       2013-07-05 14:50:47
Message-ID: 51D6DD47.6020606 () calculatedsteam ! com
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I do this all the time; In fact, I've written a dynamic aggregate engine 
that uses a sudo bind variable technique & dynamic joins with dependency 
injection because the table names and query logic are not known at run 
time - all in plpgsql.

sb
On 7/5/2013 9:26 AM, Andrew Dunstan wrote:
>
> On 07/05/2013 09:57 AM, Greg Jaskiewicz wrote:
>> Hey,
>>
>> We have a search method that depending on search params will join 3-5 
>> tables, craft the joins and where section. Only problem is, this is 
>> done in rather horrible java code. So using pgtap for tests is not 
>> feasible.
>> I want to move the database complexity back to database, almost 
>> writing the query construction in the plpgsql or python as stores 
>> procedure, any suggestions ?
>>
>> Unfortunately PostgreSQL won't eliminate unnecessary joins from a 
>> view, so I can't just create one view and simple code adding where's, 
>> order by, etc.
>>
>> No, I don't want to use orm.
>>
>
> It's a matter of taste. Pretty much every PL has facilities for 
> constructing and running dynamic sql. PLPgsql ,PLPerl, PLV8 ...
>
> cheers
>
> andrew
>
>
>
>



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