[ryan0x00]

i've seen a system in mysql do "insert on duplicate key update" for ages, so this is that same pattern?

[girvo]

Yeah, it is the same as INSERT ... ON DUPLICATE KEY UPDATE, and similar to REPLACE in MySQL. Exciting to see it in Postgres!

[kkland]

I think the way MySQL works in doing "INSERT ... ON DUPLICATE KEY UPDATE" is to delete the old row and insert a new row if there's an auto incremental column (mostly it's ID column). Being curious if Postgres works the same way in this regard.

[girvo]

No, that's how REPLACE works -- which is a complete pain to be honest! INSERT ... UPDATE works the way you'd hope it would, and keeps the auto inc columns correct.

[dugmartin]

No, the auto increment columns are maintained as is.

[kkland]

That's great. Otherwise, it just wastes IDs unless one figures out a workaround for it.