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Antalya 26.8: Implement additional Iceberg drop partition features #2613

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zvonand merged 1 commit into from
Oct 20, 2026
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Antalya 26.8: Implement additional Iceberg drop partition features #2613

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16 changes: 16 additions & 0 deletions docs/reference/statements/alter/partition.mdx
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Expand Up @@ -68,6 +68,22 @@ ALTER TABLE mt DROP PARTITION '2020-11-21';
ALTER TABLE mt DROP PART 'all_4_4_0';
```

On Iceberg tables, `DROP PARTITION` drops the partition by writing a new snapshot with the partition data files excluded.

By default, no parquet files are physically deleted from object storage.
The `data_lake_delete_data_on_drop` option must be enabled for data files to be purged.

:::note
Purging data files will break time travel to older snapshots that reference that partition.
:::

Example purging data files:

```sql
ALTER TABLE mt DROP PARTITION tuple(toRelativeDayNum(toDate('2026-01-01')))
SETTINGS data_lake_delete_data_on_drop = 1;
```

## DROP DETACHED PARTITION\|PART {#drop-detached-partitionpart}

```sql
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