Restore delta table to previous version after creating a copy of version with current date in databricks

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