It's Version 8.3. Both columns are of a user defined datatype which is a varchar(12) with a special check. I already did a REINDEX but it didn't help. On 6 Mrz., 18:27, t...@xxxxxxxxxxxxx (Tom Lane) wrote: > What PG version is this? Are the two columns of identical datatypes? > (I'm wondering about possible funny effects from blank-padding rules, > for example, if one is char and the other is text or varchar.) > You might also try REINDEXing both tables just in case the problem is a > corrupt index. ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster