Reduce compilation time for queries with large IN lists made up of literals.
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Key: DERBY-2483
URL: https://issues.apache.org/jira/browse/DERBY-2483
Project: Derby
Issue Type: Improvement
Components: Performance
Affects Versions: 10.3.0.0
Reporter: A B
Priority: Minor
Pulled from the write-up of DERBY-47:
As seen in the before-and-after.html document attached to DERBY-47, the
compilation/optimization time for a query with an IN list consisting of all
literals is far larger than it is for a similar in which the IN list consists
of all parameters. Since the "probe predicate" optimization implemented as
part of DERBY-47 should apply similarly to both types of queries, it would be
good to figure out what it is about literals that makes for such a long
compilation time (with respect to parameters), and to address that issue.
Note that this relatively excessive compilation time was an issue even before
the changes for DERBY-47 were committed.
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