Gabor Kaszab b66045c8a5
IMPALA-10288: Implement DESCRIBE HISTORY for Iceberg tables ...
The DESCRIBE HISTORY works for Iceberg tables and displays the
snapshot history of the table.
An example output:
DESCRIBE HISTORY iceberg_multi_snapshots;
+----------------------------+---------------------+---------------------+---------------------+
| creation_time | snapshot_id | parent_id | is_current_ancestor |
+----------------------------+---------------------+---------------------+---------------------+
| 2020-10-13 14:01:07.234000 | 4400379706200951771 | NULL | TRUE |
| 2020-10-13 14:01:19.307000 | 4221472712544505868 | 4400379706200951771 | TRUE |
+----------------------------+---------------------+---------------------+---------------------+
The purpose here was to have similar output with this new feature as
what SparkSql returns for "SELECT * from tablename.history".
See "History" section of
https://iceberg.apache.org/spark/#inspecting-tables
Testing:
- iceberg-negative.test was extended to check that DESCRIBE HISTORY
is not applicable for non-Iceberg tables.
- iceberg-table-history.test: Covers basic usage of DESCRIBE
HISTORY. Tests on tables created with Impala and also with Spark.
Change-Id: I56a4b92c27e8e4a79109696cbae62735a00750e5
Reviewed-on: http://gerrit.cloudera.org:8080/16599
Reviewed-by: Zoltan Borok-Nagy <boroknagyz@cloudera.com >
Reviewed-by: wangsheng <skyyws@163.com >
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com >
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