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From:Micah Stevens Date:November 22 2007 5:43pm
Subject:Re: Determining Table Storage Engine Type on Crashed Table
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Look at the data files. The extension of the file will tell you.


On 11/21/2007 12:42 PM, Richard Edward Horner wrote:
> Hey everybody,
>
> Hopefully some of you are already enjoying time off. I am not...yet :)
>
> Anyway, is there a way to determine what storage engine a table is
> using if it's crashed?  When it's fine, I can just run:
>
> mysql> show table status like 'table_name';
>
> +-------------+--------+---------+------------+--------+----------------+-------------+------------------+--------------+-----------+----------------+---------------------+---------------------+---------------------+-------------------+----------+----------------+---------+
> | Name        | Engine | Version | Row_format | Rows   |
> Avg_row_length | Data_length | Max_data_length  | Index_length |
> Data_free | Auto_increment | Create_time         | Update_time
> | Check_time          | Collation         | Checksum | Create_options
> | Comment |
>
> +-------------+--------+---------+------------+--------+----------------+-------------+------------------+--------------+-----------+----------------+---------------------+---------------------+---------------------+-------------------+----------+----------------+---------+
> | table_name | MyISAM |      10 | Fixed      | 985984 |             13
> |    12817792 | 3659174697238527 |     34238464 |         0 |
> 1182153 | 2007-11-15 17:44:28 | 2007-11-21 15:28:07 | 2007-11-21
> 15:28:18 | latin1_swedish_ci |     NULL |                |         |
>
> +-------------+--------+---------+------------+--------+----------------+-------------+------------------+--------------+-----------+----------------+---------------------+---------------------+---------------------+-------------------+----------+----------------+---------+
> 1 row in set (0.00 sec)
>
> As you can see, the second column returned is the Engine. In this
> case, MyISAM. Now, if I crash the table, it doesn't work:
>
> mysql> show table status like 'table_name';
>
> +-------------+--------+---------+------------+------+----------------+-------------+-----------------+--------------+-----------+----------------+-------------+-------------+------------+-----------+----------+----------------+----------------------------------------------------------------------------+
> | Name        | Engine | Version | Row_format | Rows | Avg_row_length
> | Data_length | Max_data_length | Index_length | Data_free |
> Auto_increment | Create_time | Update_time | Check_time | Collation |
> Checksum | Create_options | Comment
>                                 |
>
> +-------------+--------+---------+------------+------+----------------+-------------+-----------------+--------------+-----------+----------------+-------------+-------------+------------+-----------+----------+----------------+----------------------------------------------------------------------------+
> | table_name | NULL   |    NULL | NULL       | NULL |           NULL |
>        NULL |            NULL |         NULL |      NULL |
> NULL | NULL        | NULL        | NULL       | NULL      |     NULL |
> NULL           | Table './blah/table_name' is marked as crashed and
> should be repaired |
>
> +-------------+--------+---------+------------+------+----------------+-------------+-----------------+--------------+-----------+----------------+-------------+-------------+------------+-----------+----------+----------------+----------------------------------------------------------------------------+
> 1 row in set (0.00 sec)
>
> Now, let's assume for a moment this were an InnoDB table. If I were to
> try and run repair, it would say that the storage engine does not
> support repair so clearly it knows what the storage engine is. How do
> I get it to tell me? Or I guess a broader more helpful question would
> be, "What are all the ways to determine a table's storage engine
> type?"
>
> Thanks,
>   
Thread
Determining Table Storage Engine Type on Crashed TableRichard Edward Horner21 Nov
  • Re: Determining Table Storage Engine Type on Crashed TableMicah Stevens22 Nov
    • Re: Determining Table Storage Engine Type on Crashed TableRichard Edward Horner23 Nov
  • Re: Determining Table Storage Engine Type on Crashed TablePaul McCullagh23 Nov
    • Re: Determining Table Storage Engine Type on Crashed TableRichard Edward Horner23 Nov
    • Re: Determining Table Storage Engine Type on Crashed TableRichard Edward Horner28 Nov
      • Re: Determining Table Storage Engine Type on Crashed TableWm Mussatto28 Nov
      • Re: Determining Table Storage Engine Type on Crashed TableAlex Arul Lurthu2 Dec
        • Re: Determining Table Storage Engine Type on Crashed TableTodd Lyons5 Dec