[SQL] Question regarding indices

2010-09-11 Thread Steve
Hello List, I have a small question about the order of values in a query. Assume I have a table with the following fields: uid INT, data BIGINT, hits INT And an unique index on (uid, data). I use libpq C API to query data from the table. The query is something like this: SELECT

[SQL] Question about PQexecParams

2010-09-11 Thread Steve
Hello list, I would like to call a function from my C application by using libpq and PQexecParams. My problem is that I don't know how to specify that I want to send an array to the function. Assume the function is called lookup_data and takes the following parameters:

Re: [SQL] Question regarding indices

2010-09-11 Thread Tom Lane
Steve stev...@gmx.net writes: I have a small question about the order of values in a query. Assume I have a table with the following fields: uid INT, data BIGINT, hits INT And an unique index on (uid, data). I use libpq C API to query data from the table. The query is something

Re: [SQL] Question regarding indices

2010-09-11 Thread Steve
Original-Nachricht Datum: Sat, 11 Sep 2010 10:05:18 -0400 Von: Michael Gould mgo...@intermodalsoftwaresolutions.net An: Steve stev...@gmx.net Betreff: Re: [SQL] Question regarding indices Steve, Hello Michael, If I remember correctly the sort only works on the

Re: [SQL] Question regarding indices

2010-09-11 Thread Steve
Original-Nachricht Datum: Sat, 11 Sep 2010 11:04:16 -0400 Von: Tom Lane t...@sss.pgh.pa.us An: Steve stev...@gmx.net CC: pgsql-sql@postgresql.org Betreff: Re: [SQL] Question regarding indices Steve stev...@gmx.net writes: I have a small question about the order

Re: [SQL] Question regarding indices

2010-09-11 Thread Tom Lane
Steve stev...@gmx.net writes: Von: Tom Lane t...@sss.pgh.pa.us It's unlikely to make enough difference to be worth the trouble. Making a quick sort is ultra easy in C. Anyway... is there a difference in the speed of the query with pre-sorted values or not? If there is one then I will go

Re: [SQL] Question about PQexecParams

2010-09-11 Thread Dmitriy Igrishin
Hey Steve, 2010/9/11 Steve stev...@gmx.net Hello list, I would like to call a function from my C application by using libpq and PQexecParams. My problem is that I don't know how to specify that I want to send an array to the function. Assume the function is called lookup_data and

[SQL] 9.0rc1 - query of view produces unexpected results

2010-09-11 Thread Nathan Grange
Hello list, I don't know if it's me, or maybe even the way I designed these dependencies, but I'm getting unexpected results when i query a specific view. I can only reproduce the unexpected results with a very specific set of tables, views, and relationships. The bad results are only