Time handling in Dates
----------------------
Key: OPENJPA-971
URL: https://issues.apache.org/jira/browse/OPENJPA-971
Project: OpenJPA
Issue Type: Bug
Affects Versions: 1.2.0
Environment: Linux
Java 1.6.0_12
MySQL, Hypersonic
Reporter: Adam Hardy
I have what looks like a bug in time handling, that probably stems from the
database Dictionaries. My testing shows it occurs with MySQL and Derby, but not
for PostgreSQL, H2 or Hypersonic (using latest GA versions of Java, OpenJPA &
JDBC drivers).
If I save an entity with this set-up, I see incorrect handling of dates:
class MyEntity
{
...
private java.util.Date opening;
...
}
and:
<entity>
<attributes>
<basic name="opening">
<column name="OPENING"/>
<temporal>TIME</temporal>
</basic>
...
and:
create table MY_ENTITY (
...
OPENING time not null,
...
In my test I assign a new value to 'opening', save the entity and retrieve it
from the database again. Then I compare the date on the retrieved entity
against the value originally assigned, and I get this result:
with Derby: original Calendar.HOUR_OF_DAY == 9, retrieved value = 10
(probably due to Daylight Saving Time handling)
with MySQL: original Calendar.YEAR == 1970, retrieved value = 1969
With MySQL it could be declared irrelevant since the value comes from a Time
database type and the Java comparisons should blank out or ignore non-time Date
values. However the MySQLDictionary refuses to read in Times in the HH:MM:SS
format when zero 00:00:00 - it causes the following exception:
<openjpa-1.2.0-r422266:683325 nonfatal general error>
org.apache.openjpa.persistence.PersistenceException: Cannot convert value
'00:00:00' from column 9 to TIMESTAMP.
at
org.apache.openjpa.jdbc.sql.DBDictionary.narrow(DBDictionary.java:4238)
at
org.apache.openjpa.jdbc.sql.DBDictionary.newStoreException(DBDictionary.java:4203)
at
org.apache.openjpa.jdbc.sql.SQLExceptions.getStore(SQLExceptions.java:102)
at
org.apache.openjpa.jdbc.sql.SQLExceptions.getStore(SQLExceptions.java:88)
at
org.apache.openjpa.jdbc.sql.SQLExceptions.getStore(SQLExceptions.java:64)
at
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initialize(JDBCStoreManager.java:282)
at
org.apache.openjpa.kernel.DelegatingStoreManager.initialize(DelegatingStoreManager.java:111)
at
org.apache.openjpa.kernel.ROPStoreManager.initialize(ROPStoreManager.java:57)
at org.apache.openjpa.kernel.BrokerImpl.initialize(BrokerImpl.java:894)
at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:852)
at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:774)
at
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.load(JDBCStoreManager.java:917)
at
org.apache.openjpa.jdbc.sql.AbstractResult.load(AbstractResult.java:278)
at
org.apache.openjpa.jdbc.sql.SelectImpl$SelectResult.load(SelectImpl.java:2391)
at
org.apache.openjpa.jdbc.sql.AbstractResult.load(AbstractResult.java:272)
at
org.apache.openjpa.jdbc.kernel.InstanceResultObjectProvider.getResultObject(InstanceResultObjectProvider.java:59)
at org.apache.openjpa.kernel.QueryImpl.singleResult(QueryImpl.java:1294)
at org.apache.openjpa.kernel.QueryImpl.toResult(QueryImpl.java:1221)
at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:990)
at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:805)
at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:775)
at
org.apache.openjpa.kernel.DelegatingQuery.execute(DelegatingQuery.java:533)
at org.apache.openjpa.persistence.QueryImpl.execute(QueryImpl.java:251)
at
org.apache.openjpa.persistence.QueryImpl.getSingleResult(QueryImpl.java:316)
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