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https://issues.apache.org/jira/browse/DERBY-5973?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Knut Anders Hatlen updated DERBY-5973:
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Description:
The BooleanDataValue interface and the SQLBoolean class implement the boolean
IS operator in their is() and isNot() methods. There is also an (unused) IsNode
class for the AST. 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.
was:
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.
> 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. There is also an (unused)
> IsNode class for the AST. 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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