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From "Knut Anders Hatlen (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DERBY-5695) Speed up population of tables in OrderByAndSortAvoidance
Date Thu, 19 Apr 2012 12:20:41 GMT
Speed up population of tables in OrderByAndSortAvoidance

                 Key: DERBY-5695
                 URL: https://issues.apache.org/jira/browse/DERBY-5695
             Project: Derby
          Issue Type: Improvement
          Components: Test
    Affects Versions:
            Reporter: Knut Anders Hatlen
            Assignee: Knut Anders Hatlen
            Priority: Minor

OrderByAndSortAvoidance executes about 3000 INSERT and UPDATE statements to populate table1
and table2 in its decorateSQL() method. Since each of the statements has to be parsed and
compiled, this could take quite some time on less powerful hardware.

There are essentially three kinds of statements, and they could be parametrized like this:


INSERT INTO table2 VALUES (?,?,?)

UPDATE table2 SET value='true' WHERE id=? AND name='has_address'

We should parametrize the statements, prepare them once and execute them multiple times in
order to speed up the test.

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