On Thu, Oct 11, 2012 at 3:22 PM, Simon Riggs <si...@2ndquadrant.com> wrote:
> So we just need a function called pg_if_table_exists(table, SQL) which
> wraps a test in a subtransaction.
>
> And you write
>
> SELECT pg_if_table_exists('foo', 'TRUNCATE TABLE foo');
>
> and we can even get rid of all that other DDL crud that's been added....
>
> and we can have pg_if_table_not_exists() also.You could make this more composable by having pg_table_exists() and pg_execute_sql_from_string(). Then you can write: SELECT CASE WHEN pg_table_exists(...) THEN pg_execute_sql_from_string(...) END. And if you want the if-not-exists case then just stick a NOT in there. And if you want a more complicated condition, you can easily write that as well. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
