hive-protolib/src/main/java/com/streamsets/pipeline/stage/lib/hive/HiveMetastoreUtil.java
public static String getQualifiedTableName(String dbName, String tableName) {
    return (dbName == null || dbName.isEmpty())?
        escapeHiveObjectName(tableName) :
        JOINER.join(escapeHiveObjectName(dbName), escapeHiveObjectName(tableName))
        ;
  }
public static String getQualifiedTableName(String dbName, String tableName) {
    return (dbName == null || dbName.isEmpty())?
        escapeHiveObjectName(tableName) :
        JOINER.join(escapeHiveObjectName(dbName), escapeHiveObjectName(tableName))
        ;
  }
Get qualified table name (defined as dbName.tableName)
@param dbName Database name
@param tableName Table Name
@return the qualified table name.