Jdev 12c - setting db proxy user

kdario

FYI

OracleConnection.openProxySession() behaviour has changed between ojdbc6 and ojdbc7 drivers(and I didn't found this is documented somewhere).

So if you are using db proxy users in 12c ADF application, then you must invoke conn.autoCommit(false) after setting proxy user(because in ojdbc7, returned proxy connection will have this value set to true).

Dario

dvohra21

It is documented.

"The Oracle.connect() method defaults to a false setting of the auto-commit flag. However, it also has signatures to set it explicitly. In the Oracle JDBC implementation, the auto-commit flag defaults to true."

Key Programming Considerations

kdario

Well, this is documentation for sqlj and first sentence just confirms what I said(that auto-commit by default should be false) 

Just to clarify my original post:

When you retrieve jdbc connection in adf application(for example, in app module impl class), that connection already has autocommit=false (because framework will set this property)

Difference between adf 11.x and 12.x is in setting db proxy user (by using conn.openProxySession() ) :

In 11.x (which uses ojdbc6 driver) invocation of openProxySession() method will preserve autocommit=false

In 12.x (which uses ojdbc7 driver) invocation of openProxySession() method will reset autocommit to true (and adf app will not work correctly with this setting)

Dario

dvohra21

ojdbc7.jar is based on JDBC 4.1 and JDBC 4.1 still sets auto-commit to true by default.

"The default is for auto-commit mode to be enabled when the Connection object is

created."

http://download.oracle.com/otn-pub/jcp/jdbc-4_1-mrel-spec/jdbc4.1-fr-spec.pdf?AuthParam=1404073866_5e28356fa3b11ea367d6b…

Could auto commit be false for the PROXYTYPE_USER_NAME specified?

OracleConnection (Oracle Database JDBC Java API Reference)

dvohra21

CONNECTION_PROPERTY_AUTOCOMMIT_DEFAULT is true in both 11g and 12c.

http://docs.oracle.com/cd/E18283_01/appdev.112/e13995/constant-values.html#oracle_jdbc_OracleConnection_CONNECTION_PROPERTY_AUTOCOMMIT_DEFAULT

http://docs.oracle.com/cd/E16655_01/appdev.121/e17663/constant-values.html#oracle_jdbc_OracleConnection_CONNECTION_PROPERTY_AUTOCOMMIT_DEFAULT

Is setting of false documented?