Allow NULLS LAST in CREATE INDEX -------------------------------- Key: CORE-5914 URL: http://tracker.firebirdsql.org/browse/CORE-5914 Project: Firebird Core Issue Type: Improvement Components: Engine Reporter: Karol Bieniaszewski
Add posiibility to specify NULLS LAST/NULLS FIRS directive in index creation CREATE ASCENDING INDEX IXA_TABLE_FIELD ON TABLE(FIELD) NULLS LAST; this will help in queries like this SELECT * FROM TABLE ORDER BY FIELD NULLS LAST or SELECT * FROM TABLE WHERE FIELD IS NOT NULL ORDER BY FIELD now plan looks like PLAN (TABLE ORDER IXA_TABLE_FIELD) which is not efficient because first in index are nulls But if table have most of nulls but for e.g. 1% contain data, this plan is inefficient -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://tracker.firebirdsql.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel