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OPENJPA-1333 Updated db support docs with potential solutions for limited batch support of Oracle drivers. 

git-svn-id: https://svn.apache.org/repos/asf/openjpa/trunk@821077 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jeremy Bauer 2009-10-02 16:20:01 +00:00
parent 400c592100
commit bcdfee33fe
1 changed files with 15 additions and 4 deletions
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19
openjpa-project/src/doc/manual/supported_databases.xml
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@ -957,10 +957,21 @@ back as a blank string.
<listitem>
<para>
Oracle corp's JDBC driver for Oracle has only limited support for batch updates.
The result for OpenJPA is that in some cases, the exact object that failed an
optimistic lock check cannot be determined, and OpenJPA will throw an
<classname>OptimisticVerificationException</classname> with more failed objects
than actually failed.
The result for OpenJPA is that batching of some statements may fail and in some cases,
the exact object that failed an optimistic lock check cannot be determined. OpenJPA will
throw an <classname>OptimisticException</classname> with more failed objects than actually
failed. This situation may be resolved by disabling statement batching by setting the
batchLimit value to zero or by using a more recent Oracle JDBC Driver (11.2.0.1) with
batch support improvements. Attempting to resolve the issue with a more current driver
is recommended since disabling statement batching can result in a decrease in performance.
<example id="dbsupport_oracle_disable_batch_updates">
<title>
Property to disable statement batching for Oracle
</title>
<programlisting>
openjpa.jdbc.DBDictionary: oracle(batchLimit=0)
</programlisting>
</example>
</para>
</listitem>
<listitem>