Operator precedence problem when use: NOT <boolean literal> - in complex
boolean expression
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Key: CORE-5193
URL: http://tracker.firebirdsql.org/browse/CORE-5193
Project: Firebird Core
Issue Type: Bug
Components: Engine
Affects Versions: 4.0 Initial, 3.0 RC2
Reporter: Pavel Zotov
1) select (not false = true) is not unknown from rdb$database; -- <true>
2) select not false = true is not unknown from rdb$database; -- <false>
Result of first query is obvious and expected.
But result of second is equal to:
NOT (false = true is not unknown)
It seems that results should be evaluated as: (NOT false) = true is not unknown
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