PostgreSQL - Tipps und Tricks

Siehe auch:

• PostgreSQL
• PostGIS

Quickreference

Im Aufbau...

• Start pgsl-Client:

 $ psql.exe -h localhost -p 5432 template1 "postgres"

PostgreSQL SQL

Version:

 select version();

Problem with date fields (works for < 8.3):

 SELECT THE_GEOM ... (END_DATE -  NOW() >= 10) AS GREEN 
   AND (END_DATE - NOW() < 0) AS RED ... FROM ...

Casting changes in 8.3:

 SELECT THE_GEOM ... (END_DATE -  NOW() >= '10 DAYS'::INTERVAL) AS GREEN 
   AND (END_DATE - NOW() < '0'::INTERVAL) AS RED ... FROM ...

 SELECT THE_GEOM ...
   EXTRACT(DAY FROM (END_DATE -  NOW()) >= 10) AS GREEN
   AND EXTRACT(DAY FROM (END_DATE - NOW()) < 0) AS RED ... FROM ...

Konfiguration

Die pg_hba.conf kann so eingestellt werden, dass bei der Ausführung von PostgreSQL-Kommandozeilen-Tools kein Passwort übertragen werden muss.

Bsp mit 127.0.0.1: Anstelle

 # IPv4 local connections:
 host    all         all         127.0.0.1/32          md5

neu:

 # IPv4 local connections:
 host    all         all         127.0.0.1/32          trust