GitHub user zellerh opened a pull request:
https://github.com/apache/incubator-trafodion/pull/34
TRAFODION-40 Make index-maintenance delete conditional
This fixes the issue where we update an indexed column to itself, and
the index maintenance tree both deletes and re-inserts the index row
within the same millisecond. This makes the index row disappear, as the
delete takes precedence over the insert, even though it happened earlier.
As a side-effect, index maintenance may get faster, because we are
also replacing the CheckAndPut of the index insert with a Put.
We could further improve this by processing multiple Puts together.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zellerh/incubator-trafodion bug/udf1
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-trafodion/pull/34.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #34
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commit 7801e6a200ebef7b0794d4749c38b73c14b28be6
Author: Hans Zeller <[email protected]>
Date: 2015-07-29T16:06:06Z
TRAFODION-40 Make index-maintenance delete conditional
This fixes the issue where we update an indexed column to itself, and
the index maintenance tree both deletes and re-inserts the index row
within the same millisecond. This makes the index row disappear, as the
delete takes precedence over the insert, even though it happened earlier.
As a side-effect, index maintenance may get faster, because we are
also replacing the CheckAndPut of the index insert with a Put.
We could further improve this by processing multiple Puts together.
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