@Override
  public String getPreUpgradeScriptName(int index, String upgradeScriptName) {
    return PRE_UPGRADE_PREFIX + index + "-" + upgradeScriptName;
  }
Find the directory of metastore scripts
@return
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/MetaStoreSchemaInfo.java