On 1/16/24 6:34 AM, arun chirappurath wrote: > I am trying to load data from the temp table to the main table and catch > the exceptions inside another table.
I don't have a specific answer, but do have a few comments:
- There are much easier ways to do this kind of data load. Search for "postgres data loader" on google.
- When you're building your dynamic SQL you almost certainly should have some kind of ORDER BY on the queries pulling data from information_schema. SQL never mandates data ordering except when you specifically use ORDER BY, so the fact that your fields are lining up right now is pure luck.
- EXCEPTION WHEN others is kinda dangerous, because it traps *all* errors. It's much safer to find the exact error code. An easy way to do that in psql is \errverbose [1]. In this particular case that might not work well since there's a bunch of different errors you could get that are directly related to a bad row of data. BUT, there's also a bunch of errors you could get that have nothing whatsoever to do with the data you're trying to load (like if there's a bug in your code that's building the INSERT statement).
- You should look at the other details you can get via GET STACKED DIAGNOSTICS [2]. As far as I can tell, your script as-written will always return the first column in the target table. Instead you should use COLUMN_NAME. Note that not every error will set that though.