I have a Server and several Client Applications. The Server has to be started before a client can be started. The clients then create tables in the database if they don't exists.
When the Server is started (some tables do not exist) and the following query gives me an exception
:
UPDATE recipes SET lock = null
WHERE lock IS NOT NULL;
Relation >>recipes<< does not exists
I want to avoid this exception
by checking if this table exists or not.
UPDATE recipes SET lock = null
WHERE lock IS NOT NULL AND
WHERE EXISTS (
SELECT 1
FROM information_schema.tables
WHERE table_schema = 'public'
AND table_name = 'recipes'
);
But this query
does not work. Can you tell me where my mistake is?
Best Answer
You need a pl/pgsql block to do the
IF
: