private MPackage findMPackage(String catName, String db, String packageName) {
    MPackage pkg;
    catName = normalizeIdentifier(catName);
    db = normalizeIdentifier(db);
    boolean committed = false;
    Query query = null;
    try {
      openTransaction();
      query = findPackageQuery();
      pkg = (MPackage) query.execute(packageName, db, catName);
      pm.retrieve(pkg);
      committed = commitTransaction();
    } finally {
      rollbackAndCleanup(committed, query);
    }
    return pkg;
  }
Get partition's column stats

@return Map of column name and its stats
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/ObjectStore.java