Small things making a big difference

I ported a fairly small webapp from Microsoft SQL Server to PostgreSQL today. Fairly small, but it still went pretty darn fast - took me just about an hour!

One thing that helped a lot compared to previous times I've done this is the new lastval() function in version 8.1. It takes away having to rewrite all those pieces of code that rely on the @@IDENTITY variable or SCOPE_IDENTITY() function in MSSQL. Thank you Dennis!

Apart from that there were two small things to do - get rid of the datediff() calls (and replace them with much much nicer PostgreSQL equivalents) and change JOINs to FROM on multi-table updates. Finally, I replaced the Full Text Indexes with tsearch2. Using the snowball stemmer in Swedish that also gives a lot better result than the old one, which was a nice bonus :-)


I speak at and organize conferences around Open Source in general and PostgreSQL in particular.


PGConf.EU 2016
Nov 1-4, 2016
Tallinn, Estonia
Berlin PUG
Nov 17, 2016
Berlin, Germany
PGConf.Asia 2016
Dec 2-3, 2016
Tokyo, Japan
FOSDEM + PGDay 2017
Feb 2-4, 2017
Brussels, Belgium


Stockholm PUG 2016/5
Oct 25, 2016
Stockholm, Sweden
Postgres Vision 2016
Oct 11-13, 2016
San Francisco, USA
Postgres Open
Sep 13-16, 2016
Dallas, USA
Stockholm PUG 2016/4
Aug 31, 2016
Stockholm, Sweden
PG Day'16 Russia
Jul 6-8, 2016
St Petersburg, Russia
More past conferences