Categories:

Table functions

ICEBERG_TABLE_SNAPSHOT_REFRESH_HISTORY

Returns metadata and snapshot information about the most recent refresh history for a specified externally managed Apache Iceberg™ table.

Note

Snowflake version 9.16 added Delta-based table support for this function. The function only displays Delta-based table refresh data from version 9.16 and later.

See also:

Apache Iceberg™ tables , Metadata and retention for Apache Iceberg™ tables , ALTER ICEBERG TABLE … REFRESH

Syntax

ICEBERG_TABLE_SNAPSHOT_REFRESH_HISTORY( TABLE_NAME => '<table_name>' )
Copy

Arguments

TABLE_NAME => 'table_name'

The name of the externally managed Iceberg table for which you want to retrieve the snapshot refresh history.

Output

The function returns the following columns:

Column name

Data type

Description

Delta-based table note

REFRESHED_ON

TIMESTAMP_LTZ

The timestamp when the table was last refreshed.

METADATA_FILE_NAME

TEXT

The full path to the metadata file.

The full path to the commit or checkpoint file.

SNAPSHOT_ID

TEXT

The snapshot ID of the last refresh.

The resulting commit ID of the last refresh.

SEQUENCE_NUMBER

TEXT

The sequence number of the last refresh; NULL for Iceberg v1.

Not applicable for Delta-based tables; displays as NULL.

ICEBERG_SCHEMA_ID

TEXT

The schema ID of the refresh (from metadata).

Not applicable for Delta-based tables; displays as NULL.

QUERY_ID

TEXT

The ID of the query that performed the refresh. For tables that use automated refresh, this column contains a sentinel value, which indicates that the refresh was automated.

IS_CURRENT_SNAPSHOT

BOOLEAN

TRUE if the table is refreshed on this snapshot; otherwise, FALSE.

TRUE if the table is refreshed on this version (commit); otherwise, FALSE.

SNAPSHOT_SUMMARY

VARIANT

The Iceberg snapshot summary from the metadata.json file. NULL if not present in the metadata file.

Not applicable for Delta-based tables; displays as NULL.

Examples

Retrieve information for the current version of an externally managed Iceberg table named my_iceberg_table:

SELECT * FROM TABLE(INFORMATION_SCHEMA.ICEBERG_TABLE_SNAPSHOT_REFRESH_HISTORY( TABLE_NAME => 'my_iceberg_table' ));
Copy

Output:

+-------------------------------+----------------------------------------------------------------------------------+---------------------+-----------------+-------------------+--------------------------------------+---------------------+---------------------------------+ | REFRESHED_ON | METADATA_FILE_NAME | SNAPSHOT_ID | SEQUENCE_NUMBER | ICEBERG_SCHEMA_ID | QUERY_ID | IS_CURRENT_SNAPSHOT | SNAPSHOT_SUMMARY | |-------------------------------+----------------------------------------------------------------------------------+---------------------+-----------------+-------------------+--------------------------------------+---------------------+---------------------------------| | 2024-12-09 11:00:50.506 -0800 | s3://my-bucket/metadata/00000-e3bf7230-283f-4626-a770-fe97a3ca239e.metadata.json | NULL | NULL | 0 | 01b8ebb4-0002-3a10-0000-012903c7e42a | False | NULL | | 2024-12-09 11:01:35.543 -0800 | s3://my-bucket/metadata/00001-bf116652-b5b0-479a-947e-6c799e4ca124.metadata.json | 6201065399847600377 | NULL | 0 | 01b8ebb5-0002-3a14-0000-012903c7f336 | True | { | | | | | | | | | "added-data-files": "4", | | | | | | | | | "added-files-size": "144896", | | | | | | | | | "added-records": "150000", | | | | | | | | | "manifests-created": "1", | | | | | | | | | "manifests-kept": "0", | | | | | | | | | "manifests-replaced": "0", | | | | | | | | | "total-data-files": "4", | | | | | | | | | "total-files-size": "144896", | | | | | | | | | "total-records": "150000" | | | | | | | | | } | +-------------------------------+----------------------------------------------------------------------------------+---------------------+-----------------+-------------------+--------------------------------------+---------------------+---------------------------------+
Language: English