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Date: Sun, 29 Oct 2006 22:34:17 -0800 (PST)
From: "Yip Ng (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Commented: (DERBY-2002) Case expression allows NULL in all
 parts of <result>
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    [ http://issues.apache.org/jira/browse/DERBY-2002?page=comments#action_12445501 ] 
            
Yip Ng commented on DERBY-2002:
-------------------------------

Christian wrote:
>The statement
>  CREATE VIEW v1(c1) AS VALUES NULL;
>produces a NullPointerException...

I don't see any existing jira entry for this, so looks like you find a new bug.  =)

Yip wrote:
>So the implementation is trying to process a conforming SQL language in a nonconforming manner, 
>so it should raise a syntax exception.

Sorry for the confusion/contradiction here, I wrote this in a haste.  What I was trying to convey is:

The original intent of this jira is to not allow NULLs in *ALL* parts of <result> in the case expression so that 
it conforms to the SQL:2003 spec, section 6.11 <case expression> Syntax rule 3.   And by processing this in 
a *conforming* manner, a syntax exception should be raised.



> Case expression allows NULL in all parts of <result>
> ----------------------------------------------------
>
>                 Key: DERBY-2002
>                 URL: http://issues.apache.org/jira/browse/DERBY-2002
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.2.1.6, 10.3.0.0
>         Environment: Any
>            Reporter: Yip Ng
>
> According to the SQL:2003 spec, section 6.11 <case expression> Syntax Rule 3.  At least one <result> in a 
> <case specification> shall specify a <result expression>.  Derby currently is violating this rule.  e.g.:
> ij> values case when 1=2 then NULL when 1=3 then NULL else NULL end;
> 1
> ----
> NULL
> 1 row selected
> 6.11 <case expression> Format section defines <result> as the following:
> <result> ::= 
>     <result expression>
>     | NULL
> The above statement should have thrown a SQLException instead of returning a result.
> sysinfo:
> ------------------ Java Information ------------------
> Java Version:    1.4.2_12
> Java Vendor:     Sun Microsystems Inc.
> Java home:       C:\jdk142\jre
> Java classpath:  classes;.
> OS name:         Windows XP
> OS architecture: x86
> OS version:      5.1
> Java user name:  yip
> Java user home:  C:\Documents and Settings\Administrator
> Java user dir:   C:\derby\trunk
> java.specification.name: Java Platform API Specification
> java.specification.version: 1.4
> --------- Derby Information --------
> JRE - JDBC: J2SE 1.4.2 - JDBC 3.0
> [C:\derby\trunk\classes] 10.3.0.0 alpha - (1)
> ------------------------------------------------------
> ----------------- Locale Information -----------------
> Current Locale :  [English/United States [en_US]]
> Found support for locale: [de_DE]
>          version: 10.3.0.0 alpha - (1)
> Found support for locale: [es]
>          version: 10.3.0.0 alpha - (1)
> Found support for locale: [fr]
>          version: 10.3.0.0 alpha - (1)
> Found support for locale: [it]
>          version: 10.3.0.0 alpha - (1)
> Found support for locale: [ja_JP]
>          version: 10.3.0.0 alpha - (1)
> Found support for locale: [ko_KR]
>          version: 10.3.0.0 alpha - (1)
> Found support for locale: [pt_BR]
>          version: 10.3.0.0 alpha - (1)
> Found support for locale: [zh_CN]
>          version: 10.3.0.0 alpha - (1)
> Found support for locale: [zh_TW]
>          version: 10.3.0.0 alpha - (1)
> ------------------------------------------------------

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