Hi there, I am having small trouble with sequences. I am inserting row into table, and I need to get value of its 'id' column (sequencen type). As far I know it have to be done by SELECT last_value FORM seq_name (or next_val before insert). Normally, sequences are created by 'table' & 'column' & '_seq' eg. 'table_id_seq'. Now let's rename 'table' to 'table2'. Sequence name wan't renamed. And it's my problem... I can't simple assume 'sequence id' by table/column... I see 2 solution: 1. udpate pg_class after renaming. Something like: UPDATE pg_class SET relname='table2_id_seq' WHERE relname='table_id_seq' Will this work well for all possible cases ? Is this good way ? I tried that that and then 'insert' itselfs generates error: ERROR: Relation "public"."table_id_seq" does not exist It seems it was looking for OLD sequence name. I used psql for updating, while postgres was normally running. Is this problem on my side or I can't simple change 'relname' of pg_class ? 2. make code reading 'sequence names' live. I looked around pg_class but I am not sure which relation between reltype,relfilenode,reltoastrelid are proper ones... So, how to get 'sequence name' by its 'table name' ? Name of sequence and table are not related (we can't assume some prefix in name, because table was renamed) Will this pg_class reference cost many CPU ? Thank you, Best regards, Lada 'Ray' Lostak Unreal64 Develop group http://www.orcave.com http://www.unreal64.net -------------------------------------------------------------------------- In the 1960s you needed the power of two C64s to get a rocket to the moon. Now you need a machine which is a vast number of times more powerful just to run the most popular GUI. Imagination is more important than knowledge... ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match