AquilaX's development blog » PostgreSQL

Malko ERP basic database

AquilaX — Fri, 01 Jul 2011 09:41:57 +0000

Let's start with the product management. I'll try to keep it simple for the time being. My weapon of choice, when designing the database schema is the almost great WWW SQL Designer.

Right now the schema looks like this:

And the XML file is located here.

Move table in postgres to different schema

AquilaX — Wed, 26 Aug 2009 08:15:00 +0000

To move table to different schema in PostgreSQL use:

ALTER TABLE table_name SET SCHEMA schema_name;

Enable PL/SQL for Database in Postgres

AquilaX — Wed, 19 Nov 2008 09:58:47 +0000

To enable PL/SQL in PostgreSQL use:

 
CREATE LANGUAGE 'plpgsql' HANDLER plpgsql_call_handler
LANCOMPILER 'PL/pgSQL';

Alter Columns Position in Postgres

AquilaX — Fri, 14 Nov 2008 06:19:08 +0000

Some workarounds to alter columns position in Postgres

SQL_CALC_FOUND_ROWS (kind of) for postgres

AquilaX — Mon, 06 Oct 2008 15:18:31 +0000

When I switched from MySQL to PostgreSQL, one of the things I missed the most was the ease of paging using SQL_CALC_FOUND_ROWS and SELECT FOUND_ROWS() afterwards. One of the places I use it heavily is in my Table class, which generates, sortable, filterable and paged HTML table based on an SQL Query. The tough spot was to get all the records' count, without supplying second query.

I found the solution in ADODB's Pager class and it is the following:

Given the query: [SQL] (without LIMIT and OFFSET), execute the following query:

 
SELECT Count(*) FROM ([SQL]) AS foo;

I know it's not as easy as SQL_CALC_FOUND_ROWS but it works;