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added HSQLDB to the database notes documentation.
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chenson42 committed Dec 30, 2007
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Expand Up @@ -154,6 +154,11 @@ CREATE TRUSTED PROCEDURAL LANGUAGE plpgsql
triggers are Java classes that re-use existing SymmetricDS services to read the configuration and insert data events
accordingly.
</para>
<para>
The transaction identifier support is based on SQL events that happen in a 'window' of time. The trigger(s) track when the
last trigger fired. If a trigger fired within X milliseconds of the previous firing, then the current event gets the same
transaction identifier as the last. If the time window has passed, then a new transaction identifier is generated.
</para>
</section>

</appendix>

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