[ https://issues.apache.org/jira/browse/DERBY-5893?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mamta A. Satoor updated DERBY-5893: ----------------------------------- Labels: derby_triage10_10 features (was: features) > Add support for the SQL:2008 standard IS [ NOT ] DISTINCT FROM predicate > ------------------------------------------------------------------------ > > Key: DERBY-5893 > URL: https://issues.apache.org/jira/browse/DERBY-5893 > Project: Derby > Issue Type: Improvement > Components: SQL > Affects Versions: 10.9.1.0 > Reporter: Lukas Eder > Priority: Minor > Labels: derby_triage10_10, features > > The SQL:1999 standard specifies the IS [ NOT ] DISTINCT FROM predicate in > chapter 8.15 <distinct predicate>: > <distinct predicate> ::= > <row value predicand 3> <distinct predicate part 2> > <distinct predicate part 2> ::= > IS [ NOT ] DISTINCT FROM <row value predicand 4> > <row value predicand 3> ::= > <row value predicand> > <row value predicand 4> ::= > <row value predicand> > This predicate is supported by at least these databases: > - http://www.postgresql.org/docs/9.1/static/functions-comparison.html > - http://www.h2database.com/html/grammar.html#condition_right_hand_side > - http://hsqldb.org/doc/guide/ch05.html#N11BB0 > - > http://dev.mysql.com/doc/refman/5.6/en/comparison-operators.html#operator_equal-to > (with a different syntax) > - > http://dcx.sybase.com/1200/en/dbreference/is-distinct-from-search-condition.html > It would probably make sense for the Derby database to implement it as well. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira