Alternatively, you may use the schema that is included with bind9-dlz package and it should work nicely (. Additionaly, for AXFR transfers you can create a table xfr_table (zone TEXT, client TEXT) and AXFR should work too. Then use the following in named.conf:

dlz “Mysql zone” {
database “mysql
{host=127.0.0.1 port=3306 dbname=dns user=dns pass=ashesudns ssl=false}
{select zone from dns_records where zone = ‘%zone%’}
{select ttl, type, mx_priority, case when lower(type)=’txt’ then concat(’\”‘
, data, ‘\”‘)
when lower(type) = ’soa’ then concat_ws(’ ‘, data, resp_person, serial,
refresh, retry, expire, minimum)
else data end from dns_records where zone = ‘%zone%’ and host = ‘%record
%’}
{}
{select ttl, type, host, mx_priority, case when lower(type)=’txt’ then
concat(’\”‘, data, ‘\”‘) else data end, resp_person, serial, refresh, re
try, expire,
minimum from dns_records where zone = ‘%zone%’}
{select zone from xfr_table where zone = ‘%zone%’ and client = ‘%client%’}”;
};

but can you paste your DLZ conf and database structure prehaps ?

Greets