[infinispan-issues] [JBoss JIRA] (ISPN-686) JdbcStringBasedCacheStore loads previous data from store before an insert
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https://issues.jboss.org/browse/ISPN-686?page=com.atlassian.jira.plugin.s...
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Thomas Fromm edited comment on ISPN-686 at 8/29/12 9:08 AM:
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I took this one, since I need a optimization shortly. My simple approach is just execute
Select ID w/o unmarshall maybe existing stuff to decide of insert/update should be used.
Bonus TODO: Encapsulate the select and insert/update into one transaction to avoid
SQLIntegrityConstraintViolationExceptions...
was (Author: tfromm):
I took this one, since I need a optimization shortly. My simple approach is just
execute Select ID w/o unmarshall maybe existing stuff to decide of insert/update should be
used.
JdbcStringBasedCacheStore loads previous data from store before an
insert
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Key: ISPN-686
URL: https://issues.jboss.org/browse/ISPN-686
Project: Infinispan
Issue Type: Bug
Components: Loaders and Stores
Affects Versions: 4.0.0.Final, 4.1.0.Final
Reporter: Sanne Grinovero
Assignee: Thomas Fromm
Fix For: 5.2.0.Final
The JdbcStringBasedCacheStore implementation loads the previous data on an insert to find
out if it should generate an UPDATE or INSERT statement, while it would perform much
better to just verify if the primary key exists.
On top of this, some databases provide ways to avoid the need to check at all, like
MySQL's " INSERT ... ON DUPLICATE KEY UPDATE"
[http://dev.mysql.com/doc/refman/5.0/en/insert-on-duplicate.html]
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