Fokko commented on issue #11968:
URL: https://github.com/apache/iceberg/issues/11968#issuecomment-2592233055
I was trying out the Nightly Snapshot for PyIceberg, and noticed that we
don't produce any deletion vectors (yet):
```
spark-sql (default)> CREATE OR REPLACE TABLE test_deletion_vectors (
> dt date,
> number integer,
> letter string
> )
> USING iceberg
> TBLPROPERTIES (
> 'write.delete.mode'='merge-on-read',
> 'write.update.mode'='merge-on-read',
> 'write.merge.mode'='merge-on-read',
> 'format-version'='3'
> );
Time taken: 0.112 seconds
spark-sql (default)>
> INSERT INTO test_deletion_vectors
> VALUES
> (CAST('2023-03-01' AS date), 1, 'a'),
> (CAST('2023-03-02' AS date), 2, 'b'),
> (CAST('2023-03-03' AS date), 3, 'c'),
> (CAST('2023-03-04' AS date), 4, 'd'),
> (CAST('2023-03-05' AS date), 5, 'e'),
> (CAST('2023-03-06' AS date), 6, 'f'),
> (CAST('2023-03-07' AS date), 7, 'g'),
> (CAST('2023-03-08' AS date), 8, 'h'),
> (CAST('2023-03-09' AS date), 9, 'i'),
> (CAST('2023-03-10' AS date), 10, 'j'),
> (CAST('2023-03-11' AS date), 11, 'k'),
> (CAST('2023-03-12' AS date), 12, 'l');
Time taken: 1.422 seconds
spark-sql (default)>
> DELETE FROM test_deletion_vectors WHERE number = 9;
```
It is a V3 table:
```
spark-sql (default)> DESCRIBE TABLE EXTENDED test_deletion_vectors;
dt date
number int
letter string
# Metadata Columns
_spec_id int
_partition struct<>
_file string
_pos bigint
_deleted boolean
# Detailed Table Information
Name rest.default.test_deletion_vectors
Type MANAGED
Location s3://warehouse/default/test_deletion_vectors
Provider iceberg
Owner root
Table Properties
[created-at=2025-01-15T10:13:15.609042430Z,current-snapshot-id=644093306277329092,format=iceberg/parquet,format-version=3,write.delete.mode=merge-on-read,write.merge.mode=merge-on-read,write.parquet.compression-codec=zstd,write.update.mode=merge-on-read]
Time taken: 0.037 seconds, Fetched 18 row(s)
```
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