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Displaying posts with tag: recovery table structure (reset)

How to recover table structure from FRM files online
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Recently we announced MySQL Data Recovery Portal. Here we automated some data recovery routines and published web interface to them.

First, it was a tool to estimate recovery chances from corrupted InnoDB tablespaces.

Now it’s even more exciting and useful feature – recovery table structure from FRM files online.

There are several methods to recover MySQL table structure from FRM files.

On MySQL Data Recovery Portal we utilize a combination of them.

Fake table method

The idea is to create a dummy InnoDB table, replace its .frm …

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Recover Table Structure From InnoDB Dictionary
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When a table gets dropped MySQL removes respective .frm file. This post explain how to recover table structure if the table was dropped.

You need the table structure to recover a dropped table from InnoDB tablespace. The B+tree structure of InnoDB index doesn’t contain any information about field types. MySQL needs to know that in order to access records of InnoDB table. Normally MySQL gets the table structure from .frm file. But when MySQL drops a table the respective frm file removed too.

Fortunately there is one more place where MySQL keeps the tables structure . It is the InnoDB dictionary.

InnoDB dictionary is a set of …

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