db-derby-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From David Van Couvering <David.Vancouver...@Sun.COM>
Subject Re: Interesting query
Date Mon, 20 Jun 2005 16:17:12 GMT
Hi, David.  Others may want more information, but it seems to me we at 
least need the DDL for the tables involved in this query.

Thanks,

David

David Zonsheine wrote:
> Hello derby-dev,
> 
> Thank you for the wonderful work you're doing.
> We installed Derby on our application to be used instead of SQL Server 
> and worked very hard to improve the queries.
> The process results were quite good even though we should improve them 
> more.
> 
> Now, we have 1 long and complicated query that take 0.04 seconds on SQL 
> Server and about 25 seconds on Derby.
> We worked very hard to improve it but couldn't.
> Please take a look at it and see if you have any idea. You'll help us 
> very very much if you do.
> If by any chance you want the DB dump itself I'll be very happy to post it.
> 
> The query is:
> 
> select distinct TN_RT_TOC.TOC_ID, TN_RT_TOC.NODE_ID, 
> TN_RT_TOC.CHILD_INDEX,TN_RT_TOC.PARENT_NODE_ID,
> TN_RT_TOC.NODE_NAME AS TITLE, TN_RT_TOC.NODE_TYPE AS CLASS,
> 'Document(docID='|| char(35)|| 'xpointer(id(' || char(36) || 
> TN_RT_TOC.NODE_LINK || char(36) || ')),storage=REPOSITORY)' AS LINK,
> 'Exact' AS LINKTYPE,
> 'Document(docID='|| char(35)|| 'xpointer(id(' || char(36) || 
> TN_RT_TOC.NODE_LINK || char(36) || ')),storage=REPOSITORY)' AS SOURCE_ID,
> TN_RT_TOC.NODE_TYPE AS TYPE, TN_RT_TOC.NODE_ID AS PERSISTENTID,
> supplement.PROPERTY_VALUE AS NODE_CLASS
> FROM
> TN_RT_TOC LEFT JOIN TN_RT_TOC_PROPERTI as supplement ON 
> TN_RT_TOC.TOC_ID=supplement.TOC_ID
> AND TN_RT_TOC.NODE_ID=supplement.NODE_ID AND supplement.PROPERTY_VALUE 
> IN ('JOP', 'Bulletin')
> left join TN_RT_TOC_PROPERTI as effectivity on 
> TN_RT_TOC.TOC_ID=effectivity.TOC_ID
> AND TN_RT_TOC.NODE_ID=effectivity.NODE_ID , TAIL_NUMBERS
> where
> TN_RT_TOC.TOC_ID = 'B767' AND PARENT_NODE_ID = 1
> AND (effectivity.property_name='EFF' OR effectivity.TOC_ID is null)
> AND TAIL_NUMBERS.TAIL_NUMBER='JA601J' AND TAIL_NUMBERS.ATTR_NAME='FLEET_EFF'
> and TAIL_NUMBERS.ATTR_VALUE>=CASE when effectivity.property_value is not 
> NULL
> then SUBSTR(effectivity.property_value, 1, 3)
> ELSE '0' END AND TAIL_NUMBERS.ATTR_VALUE<=CASE when 
> effectivity.property_value is not NULL
> then SUBSTR(effectivity.property_value, 4, 3) ELSE '999' END
> order by TN_RT_TOC.CHILD_INDEX
> Thank you very much!
> David Zonsheine
> Projects Development Manager
> _www.enigma.com_
> Cell: 972-54-6658784.
> 
> 
> 
> 
> 
> --------------------------------------------------------------------------------------------------------------------------------------------------------------
> This email and any files transmitted with it are confidential and 
> intended solely for the use of the individual or entity to whom
> they are addressed. If you have received this email in error please 
> notify the originator of the message.
> Scanning of this message is performed by SurfControl E-mail Filter 
> software in conjunction with virus detection software.

Mime
View raw message