Anurag Mantripragada created SPARK-58007:
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Summary: Support dynamic table options for MERGE
Key: SPARK-58007
URL: https://issues.apache.org/jira/browse/SPARK-58007
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 5.0.0
Reporter: Anurag Mantripragada
Spark supports a per-statement `WITH (key = value)` options clause on `SELECT`
(SPARK-36680), `INSERT` (SPARK-49098), and `UPDATE` (SPARK-57681). These
options are passed to DataSource V2 connectors so a single statement can tune
how the source reads or writes.
`MERGE` does not support this yet. This ticket adds the `WITH (...)` clause to
`MERGE`, for both the target and the source:
```sql
MERGE INTO target_table WITH (`write.split-size` = 10) AS t
USING source_table WITH (`split-size` = 5) AS s
ON t.id = s.id
WHEN MATCHED THEN UPDATE SET ...
WHEN NOT MATCHED THEN INSERT ...
```
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