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views:

76

answers:

1
Q: 

Primary Key - VARBINARY or BLOB or VARCHAR for UUID primary key

I am using UUID as the primary key in one of the tables. What are the pros-cons of having this field as a varchar/varbinary/blob?

DB: MYSQL.

TIA

+2  A: 

The difference between text-based and binary-based UUID is a significant number of bytes - 16 for binary representation vs. 30+ for text - so binary is the way to go. I would opt for VARBINARY over BLOB - if only 'cause VARBINARY is the newer type (and coming from a SQL Server background, I know VARBINARY there can be stored in-row).

Will A  2010-08-12 06:31:46
I agree, would not use a blob.
Remy  2010-08-12 06:40:22
is there a difference in performance when using varchar and varbinay?
 2010-08-12 08:10:06

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