Improve optimizer for IS DISTINCT FROM with boolean fields
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Key: CORE-5988
URL: http://tracker.firebirdsql.org/browse/CORE-5988
Project: Firebird Core
Issue Type: Improvement
Components: Engine
Affects Versions: 3.0.4, 4.0 Alpha 1
Reporter: Adriano dos Santos Fernandes
Currently optimizer do not use index for <boolean field> IS DISTINCT FROM {TRUE
| FALSE | NULL}
While it seems ok that IS DISTINCT FROM does not use index for others field
types, it could be more smart for booleans.
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