[OPENJPA-455] Incorrect MySQL DDL Generation for integer types

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.0, 1.0.1
• Fix Version/s: 1.1.0
• Assignee: Patrick Linskey
• Reporter: Michael Dick
• Created: 27/Nov/07 23:44
• Updated: 30/Jul/09 14:04
• Resolved: 30/Jan/08 06:30

Description

Opening a JIRA report on Tim's behalf.

I turned the schema tool loose on a MySQL production database this
afternoon and it failed. The essence of the problem appears that DDL was
being generated with a type declaration of this form:

int unsigned(10)

In MySQL, the proper form is:

int(10) unsigned

viz:

ALTER TABLE fubar MODIFY col1 int(10) unsigned;

Checking other options indicates that similar constructs such as CREATE
TABLE are likewise defective.

I looked at the svn trunk head source code in
org.apache.openjpa.jdbc.sql.MySQLDictionary.java and the parent class
DBDictionary.java. The offending method appears to be:

1508: public String getTypeName(Column col)

This method has no override in MySQLDictionary, but apparently needs
one. I think it's a minor mod, but I'm not currently set up to build and
test in the environment where the offending database exists.

This is a SEVERE error. It causes generation of defective SQL for
SQL-generating options and causes live updates to schemas to fail.

I don't have a Jira login at present, so if someone could log this, it
would be appreciated.

Thanks,

Tim Holloway

Issue Links

• is cloned by: OPENJPA-505 CLONE -Incorrect Oracle DDL Generation for integer types since OPENJPA-455