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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5837) Add support for SQL standard DATE, TIME, TIMESTAMP literals
Date Sun, 01 Jul 2012 22:32:51 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13404845#comment-13404845
] 

Knut Anders Hatlen commented on DERBY-5837:
-------------------------------------------

For completeness, Derby also supports JDBC escape syntax:

http://db.apache.org/derby/docs/dev/ref/rrefjdbc12124.html
http://db.apache.org/derby/docs/dev/ref/rrefjdbcescapedate.html
http://db.apache.org/derby/docs/dev/ref/rrefjdbc41784.html

Supporting the SQL syntax too would be nice, though...
                
> Add support for SQL standard DATE, TIME, TIMESTAMP literals
> -----------------------------------------------------------
>
>                 Key: DERBY-5837
>                 URL: https://issues.apache.org/jira/browse/DERBY-5837
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 10.8.2.2
>            Reporter: Lukas Eder
>            Priority: Minor
>
> The SQL standard 1992 specifies <datetime literals> as such:
>          <datetime literal> ::=
>                 <date literal>
>               | <time literal>
>               | <timestamp literal>
>          <date literal> ::=
>               DATE <date string>
>          <time literal> ::=
>               TIME <time string>
>          <timestamp literal> ::=
>               TIMESTAMP <timestamp string>
>          <date string> ::=
>               <quote> <date value> <quote>
>          <time string> ::=
>               <quote> <time value> [ <time zone interval> ] <quote>
>          <timestamp string> ::=
>               <quote> <date value> <space> <time value> [ <time
zone interval> ] <quote>
> Taken from:
> http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt
> This seems not to be supported directly by Derby. Instead, Derby supports functions for
constructing DATE, TIME, TIMESTAMP values. For example:
> http://db.apache.org/derby/docs/dev/ref/rreftimestampfunc.html
> For increased compatibility, it would be nice if literals were implemented according
to the standard. In essence, the function's parentheses could be made optional

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