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use mariadb

how i can use mariadb Instead of mysql in phalcon ?

MariaDB is a replacement for MySQL, so works exactly as MySQL does, no changes are necessary

I can attest this and have MariaDB running using Phalcon MySQL settings on a couple of production servers.

Ok, but MySQL adapter don't offers same functions to MariaDB, using the COLUMN_GET for COLUMNS JSON for example.

It doesnt, but since Phalcon ORM only implements the standard SQL functions, there shouldn't be any problem.