[SR-Users] too long mysql table key

[Daniel-Constantin Mierla]

On 14.04.17 17:15, Juha Heinanen wrote:
> Juha Heinanen writes:
>
>> domain-create.sql contains this:
>>
>> CREATE TABLE `domain_attrs` (
>>     `id` INT(10) UNSIGNED AUTO_INCREMENT PRIMARY KEY NOT NULL,
>>     `did` VARCHAR(64) NOT NULL,
>>     `name` VARCHAR(32) NOT NULL,
>>     `type` INT UNSIGNED NOT NULL,
>>     `value` VARCHAR(255) NOT NULL,
>>     `last_modified` DATETIME DEFAULT '2000-01-01 00:00:01' NOT NULL,
>>     CONSTRAINT domain_attrs_idx UNIQUE (`did`, `name`, `value`)
>> );
> Why value needs to be part of the index?
>
I haven't used this table myself, it's coming from SER branch, but I
guess the unique constraint is for being sure there are no duplicated
values for the same did/name tuple, but more records with same did and name.

If it would be just for fast searching, then a normal index should be used.

Cheers,
Daniel

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Daniel-Constantin Mierla
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