Knut Anders Hatlen created DERBY-5973:
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Summary: Add syntax for boolean IS operator
Key: DERBY-5973
URL: https://issues.apache.org/jira/browse/DERBY-5973
Project: Derby
Issue Type: Improvement
Components: SQL
Reporter: Knut Anders Hatlen
Priority: Minor
The BooleanDataValue interface and the SQLBoolean class implement the boolean
IS operator in their is() and isNot() methods. However, the operator is not
exposed in the grammar, so there's no way to use it.
The boolean IS operator is defined in the SQL:2003 standard, part 2, section
6.34 <boolean value expression>.
<boolean test> ::= <boolean primary> [ IS [ NOT ] <truth value> ]
There's also Table 13 — Truth table for the IS boolean operator.
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