Hi all, Yesterday I committed Arvind's patch for HIVE-1176, which includes an upgrade from datanucleus 1.x to 2.x.
The patch works fine against a clean checkout, but just now Paul Yang and I noticed a couple of problems introduced due to a change in the way column names are generated by datanucleus when no name is specified in the JDO mapping (which is the case for some of ours such as "isCompressed"). This is a heads-up for people who happen to pull from latest trunk. The problems only occur when running against an existing metastore, for example if you run trunk/build/dist/bin/hive against a new build in an existing sandbox (where a Derby embedded metastore had previously been created), or if you deploy against an existing production metastore DB. In a developer sandbox, the default configuration tries to auto-update the schema to add the new column names, and hits an error due to the way the Derby ALTER TABLE statement is generated. If you hit this, a workaround is to delete your trunk/metastore_db directory so that a fresh schema will be recreated instead. Or just move to a fresh checkout. Paul is taking a look at the column name generation to see if we can get it to match the datanucleus 1.x behavior. JVS
