[DERBY-2002] Case expression allows NULL in all parts of <result>

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 10.2.1.6, 10.3.1.4
• Fix Version/s: 10.11.1.1
• Component/s: SQL
• Labels: derby_backport_reject_10_10 derby_triage10_5_2
• Environment: Any
• Urgency: Normal
• Issue & fix info: Release Note Needed, Repro attached
• Bug behavior facts: Deviation from standard
• Assignee: Knut Anders Hatlen
• Reporter: Yip Ng
• Created: 25/Oct/06 22:14
• Updated: 09/Sep/16 09:51
• Resolved: 02/Jun/14 09:46

Description

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)
------------------------------------------------------