Function

The multi-versioning feature is to be deprecated and is not recommended.

After the multiversion function is enabled, you can run the SHOW HISTORY command to view the backup data of a table. For details about the syntax for enabling or disabling the multiversion function, see Enabling or Disabling Data Multi-Versioning (Deprecated, Not Recommended).

Currently, the multiversion function supports only OBS tables created using the Hive syntax. For details about the syntax for creating a table, see Creating an OBS Table Using the Hive Syntax.

Syntax

View the backup data of a non-partitioned table.
```
SHOW HISTORY FOR TABLE [db_name.]table_name;
```

View the backup data of a specified partition.

SHOW HISTORY FOR TABLE [db_name.]table_name PARTITION (column = value, ...);

Keywords

SHOW HISTORY FOR TABLE: Used to view backup data
PARTITION: Used to specify the partition column

Parameters

**Table 1** Parameters
Parameter	Description
db_name	Database name, which consists of letters, digits, and underscores (_). The value cannot contain only digits or start with a digit or underscore (_).
table_name	Table name
column	Partition column name
value	Value corresponding to the partition column name

Precautions