Re: OT: MySQL on Mac OS 10.4

From: Erik Hatcher (eri..hatchersolutions.com)
Date: Tue May 17 2005 - 10:20:29 EDT

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More on MySQL on OS X... I just tried MySQL(4.1.11-max) on Mac OS
(10.4.1) and got the exception shown below. I'm using a freshly
downloaded MySQL JDBC driver (mysql-connector-java-3.1.8-bin.jar).
Keep in mind that relational databases are my weakness, so I could
easily have something simple out of line. My application was able to
read data from the DB just fine, but doing a commit caused the error.

Any ideas what I could be doing wrong or have out of line?

Thanks,
Erik

      [java] java.lang.NullPointerException
      [java] at com.mysql.jdbc.Field.getMaxBytesPerCharacter
(Field.java:259)
      [java] at
com.mysql.jdbc.ResultSetMetaData.getColumnDisplaySize
(ResultSetMetaData.java:331)
      [java] at
org.objectstyle.cayenne.access.jdbc.ColumnDescriptor.<init>
(ColumnDescriptor.java:177)
      [java] at
org.objectstyle.cayenne.access.jdbc.RowDescriptor.initFromResultSet
(RowDescriptor.java:141)
      [java] at
org.objectstyle.cayenne.access.jdbc.RowDescriptor.<init>
(RowDescriptor.java:101)
      [java] at
org.objectstyle.cayenne.access.jdbc.RowDescriptor.<init>
(RowDescriptor.java:91)
      [java] at
org.objectstyle.cayenne.access.jdbc.BatchAction.processGeneratedKeys
(BatchAction.java:303)
      [java] at
org.objectstyle.cayenne.access.jdbc.BatchAction.runAsIndividualQueries
(BatchAction.java:253)
      [java] at
org.objectstyle.cayenne.access.jdbc.BatchAction.performAction
(BatchAction.java:126)
      [java] at
org.objectstyle.cayenne.access.DataNode.runBatchUpdate(DataNode.java:
398)
      [java] at
org.objectstyle.cayenne.access.DataNode.performQueries(DataNode.java:
319)
      [java] at
org.objectstyle.cayenne.access.DataContextCommitAction.commit
(DataContextCommitAction.java:187)
      [java] at
org.objectstyle.cayenne.access.DataContext.commitChanges
(DataContext.java:1043)
      [java] at
org.objectstyle.cayenne.access.DataContext.commitChanges
(DataContext.java:1013)

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