@Override
  public OperationHandle getSchemas(SessionHandle sessionHandle,
      String catalogName, String schemaName)
          throws HiveSQLException {
    OperationHandle opHandle = sessionManager.getSession(sessionHandle)
        .getSchemas(catalogName, schemaName);
    LOG.debug(sessionHandle + ": getSchemas()");
    return opHandle;
  }
Execute statement asynchronously on the server with a timeout. This is a non-blocking call
service/src/java/org/apache/hive/service/cli/CLIService.java