[CentOS] MySQL 5.5, PHP and other tools still use 5.0 client drivers

Johnny Hughes johnny at centos.org
Thu Oct 31 00:48:48 UTC 2013


On 10/30/2013 05:22 AM, Leon Fauster wrote:
> Am 29.10.2013 um 22:56 schrieb Reindl Harald <h.reindl at thelounge.net>:
>>> php-mysql is linked against mysql-5.0-libs and talking to 
>>> a mysql-5.5 server. Should this cause an unpredictable behavior?
>> no - how do you come to this idea?
> In the last decade i saw very strange results while updating 
> or doing similar things. the question above is more a theoretical 
> thought despite the rational knowledge that in this example 
> (communication-layer) the compatibility is preserved.

If you look at the Software collections info for EL6, they specifically
discuss that issue:

http://dev.centos.org/centos/6/SCL/docs/#sect-Installation_and_Usage-Migrating_from_MySQL_5.1_to_MySQL_5.5

(see section 2.6.3)

So, Red Hat has specifically tested using the 5.1 (for EL6 and 5.0 for
EL5) client library with the 5.5 database and has certified it as
working enough that they support it.

Does that mean it is flawless ... likely not.  But it is as intended.

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