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mirror of https://github.com/MariaDB/server.git synced 2025-08-01 03:47:19 +03:00
Thirunarayanan Balathandayuthapani 81a743cbd5 MDEV-37296 ALTER TABLE allows adding unique hash key with duplicate values
Problem:
=======
- During copy algorithm, InnoDB fails to detect the duplicate
key error for unique hash key blob index. Unique HASH index
treated as virtual index inside InnoDB. So bulk insert
operation doesn't detect the duplicate key error while building
the index.

Solution:
========
- Avoid bulk insert operation when table does have unique
hash key blob index.

has_unique_blob(): Check whether the table has any unique blob index

dict_table_t::unique_blob : Indicates that table has long unique
blob column
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Code status:

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MariaDB: The innovative open source database

MariaDB was designed as a drop-in replacement of MySQL(R) with more features, new storage engines, fewer bugs, and better performance.

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