Hi there, in my database I'm using several stored_functions that take advantage of temporary table. The application that is connected to Postgres is a Java Web Application in a Glassfish Application Server: it is connected by a JDBC Connection Pool provided by Glassfish with this settings: Resource type -> javax.sql.ConnectionPoolDataSouce Dataset Classname -> org.postgresql.ds.PGConnectionPoolDataSource Transaction Isolation -> read-uncommitted The problem is that in a concurrent execution of a function, I received error of relation already exists. The relation that caused issue is exactly my temporary table. My question is: what is the reason for which I take this type of error? Is there a way to follow to avoid this situation? Thanks in advance. Mephysto -- View this message in context: http://postgresql.1045698.n5.nabble.com/Temporary-table-already-exists-tp5789852.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general