在数据块中创建具有当前日期的版本副本后，将增量表恢复到以前的版本

Question

I want to restore previous version of delta table by creating its copy first with copy job run date folder name and then restore delta table using that copy file

Any suggestion here

Answer 1

First create folder with backup, adjust added date to whatever else you want:

import datetime
path = 'dbfs:/mnt/your_dataset_path'
bck_path= path +'_backup_'+datetime.datetime.utcnow().strftime("%Y%m%d%H%M%S")
    
dbutils.fs.cp(path, bck_path)

Then restore using time travel, either using the backup path or the original:

from delta.tables import *

deltaTable = DeltaTable.forPath(spark, '/mnt/your_dataset_path')  # path-based tables, or
deltaTable = DeltaTable.forName(spark, 'table-name')    # Hive metastore-based tables

deltaTable.restoreToVersion(0) # restore table to oldest version

deltaTable.restoreToTimestamp('2022-09-14') # restore to a specific timestamp