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  1. MariaDB Server
  2. MDEV-25920

Atomic DROP DATABASE

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    Description

      All DDL operations must be atomic before we can really claim to support Atomic DDL (MDEV-17567).

      DROP DATABASE was only made crash-safe in MDEV-24408; it is not atomic yet. With the following approach, it should become atomic on XA-capable storage engines:

      An atomic implementation of DROP DATABASE would involve the following internal steps:

      1. XA START
      2. For each table in storage engines, invoke handler::delete_table().
      3. If everything succeeded, invoke handlerton::drop_database in each storage engine that implements it.
      4. XA PREPARE in each storage engine
      5. XA COMMIT or XA ROLLBACK in each storage engine.

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              monty Michael Widenius
              marko Marko Mäkelä
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