pkhetrapal commented on issue #7005:
URL: https://github.com/apache/iceberg/issues/7005#issuecomment-1454981586
```
merge_insert_sql = f"""
MERGE INTO table1 t
USING (SELECT * FROM global_temp.table2) s
ON t._ID = s._ID
WHEN NOT MATCHED THEN INSERT *
"""
spark.sql(merge_insert_sql)
```
This inserts the records twice - not sure why though
```
merge_sql = f"""
MERGE INTO table1 t
USING (SELECT * FROM global_temp.table2) s
ON t._ID = s._ID
WHEN MATCHED AND s.UPDATED_AT > t.UPDATED_AT THEN UPDATE SET *
WHEN MATCHED AND s.UPDATED_AT <= t.UPDATED_AT THEN UPDATE SET t._ID =
s._ID
WHEN NOT MATCHED THEN INSERT *
spark.sql(merge_sql)
```
This inserts the records twice as well but the below one works fine
```
merge_sql = f"""
MERGE INTO table1 t
USING (SELECT * FROM global_temp.table2) s
ON t._ID = s._ID
WHEN MATCHED AND s.UPDATED_AT > t.UPDATED_AT THEN UPDATE SET *
WHEN MATCHED THEN UPDATE SET t._ID = s._ID
WHEN NOT MATCHED THEN INSERT *
spark.sql(merge_sql)
```
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