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Revision fb0be379

Parent 111bf531
Child d3308c6b

Added by Michael Hanselmann over 12 years ago

query: Add support for filters

This patch adds a “compiler” for query filters, converting them to a
callable function used while preparing the query result. In addition, a
hints call allows some analysis to be done on the query (e.g. referenced
names), making data collection more efficient.

The depth of filters is limited to avoid exceeding the runtime's maximum
recursion depth.

More operators and other improvements can be implemented using this
base. Extensive unittests are provided.

Signed-off-by: Michael Hanselmann <>
Reviewed-by: René Nussbaumer <>


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