>> C locale and en_* locales give different ordering (at least under Linux). >> The en_* ordering is case insensitive, and the C locale ordering is case >> sensitive because it is simply comparing the ASCII codes. > > You could use lower/upper to get case insensitive ordering with C locale. Okay, that's great, so I'm going to re-initialise my database cluster with the C locale this week-end. I'll report the results, for the record. Thanks to everyone who replied! Kind regards Harry Mantheakis London, UK ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match