Kristian Waagan created DERBY-5770:
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Summary: Reduce window of opportunity for queries being compiled
without statistics on istat update
Key: DERBY-5770
URL: https://issues.apache.org/jira/browse/DERBY-5770
Project: Derby
Issue Type: Improvement
Components: SQL
Affects Versions: 10.9.0.0
Reporter: Kristian Waagan
Assignee: Kristian Waagan
Priority: Minor
Currently the invalidation of statements accessing a table is issued before
dropping the old statistics and writing new ones. While we cannot guarantee
that all compilations will see the new statistics (we can currently only drop
all statistics for an index, so we cannot add the new ones first and then drop
the old ones), we can do the invalidation after the work has been done to
reduce the chances that queries are compiled without statistics at all.
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