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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DERBY-5973) Add syntax for boolean IS operator
Date Thu, 08 Nov 2012 14:23:13 GMT

     [ https://issues.apache.org/jira/browse/DERBY-5973?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Knut Anders Hatlen updated DERBY-5973:
--------------------------------------

    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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