Hi all,
Ran into a strange error recently.
I have a table "Enrollments" with a column "grade" which maps to an
enum.
I was trying to find all enrollments associated with one or more
particular grades. Basic query looks something like:
SelectQuery q = new SelectQuery(Enrollment.class);
q.setQualifier(ExpressionFactory.inExp
(Enrollment.GRADE_PROPERTY,Arrays.asList(Grade.FIRST,Grade.SECOND)));
I have a setup where all of my database-facing tests run against an
in-memory hsql database. The above worked just fine there. However,
when I ran the code via the application, which is backed by a mysql
server (5.0.27), it returned no results. Everything looked fine when
I turned on query logging... the queries in the test and in the app
were identical. So I turned to the mysql query logs and found this
(truncated to the relevant portions for clarity):
SELECT t0.grade, t0.id, t0.studentid FROM enrollments t0, students t1
WHERE t0.studentid = t1.dbid AND (t0.grade IN ('??\0~r\0!
org.edkey.attendance.domain.Grade\0\0\0\0\0\0\0\0\0\0xr
\0java.lang.Enum\0\0\0\0\0\0\0\0\0\0xpt\0FIRST', '??\0~r\0!
org.edkey.attendance.domain.Grade\0\0\0\0\0\0\0\0\0\0xr
\0java.lang.Enum\0\0\0\0\0\0\0\0\0\0xpt\0SECOND')))
This is using version 5.0.4 of the mysql-connector driver.
I changed my test for this particular piece of code to connect to the
mysql-backed db with the same results as running "live".
Any thoughts? Am I doing something wrong? Seems odd that it works
with hsqldb, but not mysql?
Robert
