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  1. MariaDB Server
  2. MDEV-18622

Instant DDL, including drop column, change column ordering etc.

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      MySQL will rebuild table when dealing with request like drop column or change column ordering, as rebuilding cost a lot of time and block requests on referred tables. it may case the server unavailable.

      So we should solve problems by using new method.

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              Assignee:
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              Reporter:
              musazhang musazhang
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