Feat: statement delete from...

[dantengsky]

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Summary

• Simple delete statement (preview edition)
  DELETE FROM table WHERE ...

mysql> -- both planners v0/v1 are supported
mysql> create table t as select * from numbers(10);
Query OK, 0 rows affected (0.08 sec)

mysql> delete from t where number % 2 = 0;
Query OK, 0 rows affected (0.05 sec)

mysql>
mysql> select * from t;
+--------+
| number |
+--------+
|      1 |
|      3 |
|      5 |
|      7 |
|      9 |
+--------+
5 rows in set (0.03 sec)
Read 5 rows, 40.00 B in 0.005 sec., 978.99 rows/sec., 7.65 **KiB/sec.**

• Main known limitations
  • USING clause is not supported yet
  • Non-distributed execution
  • no conflicts resolution yet
    in the case of mutation conflicts, the delete operation will abort

---

Changelog

• New Feature
• Not for changelog (changelog entry is not required)

Related Issues

Fixes #5146

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1 Ignored Deployment

Name	Status	Preview	Updated
databend	⬜️ Ignored (Inspect)		Jun 27, 2022 at 9:20AM (UTC)

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[BohuTANG]

cc @soyeric128 for documentation

[soyeric128]

cc @soyeric128 for documentation

Please review this PR for doc updates: #6260