private void prepareQuotes() throws SQLException {
    String s = dbType.getPrepareTxnStmt();
    if (s != null) {
      assert pm.currentTransaction().isActive();
      JDOConnection jdoConn = pm.getDataStoreConnection();
      try (Statement statement = ((Connection) jdoConn.getNativeConnection()).createStatement()) {
        statement.execute(s);
      } finally {
        jdoConn.close();
      }
    }
  }
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