[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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Sanne Grinovero commented on ISPN-686:
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Hi Thomas,
"select ID" looks like a good compromise, but which DB are you using? As I
mentioned above (years ago!) MySQL is able to deal with it in a single statement; Back in
that time I was an external contributor, but shared my custom implementation using MySQL
as a patch - should be in the mailing lists archive, but worth looking for only if you
intend to MySQL.
I'm glad that someone finally volunteers on this :)
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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