Connection.setReadOnly is a no-op in Network Server. It works fine in embedded
Derby.
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Key: DERBY-911
URL: http://issues.apache.org/jira/browse/DERBY-911
Project: Derby
Type: Bug
Components: Network Client
Versions: 10.2.0.0
Reporter: Mamta A. Satoor
I have a simple test program which calls the Connection.setReadOnly(true) and
then checks the readonly mode of that connection. In Network Server, the
Connection.isReadOnly returns false even after Connection.setReadOnly(true).
Same test program works fine when run in embedded mode, ie
Connection.isReadOnly returns true after Connection.setReadOnly(true) is
executed.
Following is the test code snippet
con =
DriverManager.getConnection("jdbc:derby://localhost:1527/db7173;create=true",
"APP", "APP");
System.out.println("Check default connection.isReadOnly " + con.isReadOnly());
con.setReadOnly(true);
System.out.println("After connection.setReadOnly(true), what is isReadOnly " +
con.isReadOnly());
The output of this code in Network Server is as follows
Check default connection.isReadOnly? false
After connection.setReadOnly(true), what is isReadOnly? false
I looked at org.apache.derby.client.am.Connection.setReadOnly method and
noticed that the method simply doesn't do anything with the supplied value. In
addition, it has following comment
// This is a hint to the driver only, so this request is silently ignored.
// PROTOCOL can only flow a set-read-only before the connection is
established.
In the same class, isReadOnly always returns false. This explains the current
behavior of Network Server. But are we really limited by the DRDA protocol here
as the comments in setReadOnly seem to imply?
Anyone more familiar with DRDA specification and/or this code in Derby, can
they share any information on DRDA spec and Derby behavior in this area?
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