Re: Adding 'serial' to existing column

Robert Lakes <robertl(at)propaas(dot)com> writes:
> I am new to Postgres and I am trying to build this SQL statement in my SQL
> script:
> ALTER TABLE listings_cdc ALTER COLUMN table_id SET DEFAULT
> nextval('tab_id_seq');

That looks correct, but this not so much:

> I am trying to build the above-stated command as a dynamic SQL statement:
> EXECUTE 'ALTER TABLE listings_cdc ALTER COLUMN table_id SET DEFAULT
> nextval('||quote_ident(tab_id_seq)||')';

> I've received an error when running the script this above-stated command:
> ERROR: column "tab_id_seq" does not exist
> LINE 1: ...OLUMN table_id SET DEFAULT nextval('||quote_ident(tab_id_seq...

You want quote_literal, not quote_ident, because you're trying to produce
a single-quoted literal.

regards, tom lane