private String getDbTypeConfString() {// "ORACLE", "MYSQL", "MSSQL", "POSTGRES"
    return "sqlserver".equalsIgnoreCase(metastoreType) ? "MSSQL" : metastoreType.toUpperCase();
  }
QTestMetaStoreHandler is responsible for wrapping the logic of handling different metastore
databases in qtests.
itests/util/src/main/java/org/apache/hadoop/hive/ql/QTestMetaStoreHandler.java