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From "Kristian Waagan (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-3601) Optimize LOBStateTracker for non-locator servers
Date Mon, 07 Apr 2008 10:40:24 GMT
Optimize LOBStateTracker for non-locator servers
------------------------------------------------

                 Key: DERBY-3601
                 URL: https://issues.apache.org/jira/browse/DERBY-3601
             Project: Derby
          Issue Type: Improvement
          Components: Network Client, Newcomer
    Affects Versions: 10.4.1.2, 10.5.0.0
            Reporter: Kristian Waagan
            Priority: Trivial


The following comments posted for DERBY-3571 should be addressed if we choose to allow multiple
calls to the various getter methods on LOB columns, except for the getter methods returning
streams:
----- Knut Anders wrote:
've tried out the 2a patch and it seems to work as intended. My only nits are:

  - LOBStateTracker.checkCurrentRow(): couldn't Arrays.fill() be moved inside the if block?
  - should discardState() and markAccessed() check the release flag?
  - should ResultSet.createLOBColumnTracker() use LOBStateTracker.NO_OP_TRACKER instead of
allocating a new when serverSupportsLocators() returns false?
-----

Note that it is a requirement that we allow multiple calls to the getter methods, otherwise
we need to maintain the state for non-locator LOB columns as well to track the number of accesses.
Another options is to rely on a different mechanism to track accesses.

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