The given 'driver' mysql is unknow

[aloksinha3110]

[root@aloktesting pim-community-standard]# php bin/console cache:clear --no-warmup --env=prod

In DBALException.php line 138:

The given 'driver' mysql is unknown, Doctrine currently supports only the following drivers: pdo_mysql, pdo_sqlite, pdo_pgsql, pdo_oci, oci8, ibm_db2, pdo_sqlsrv, mysqli, drizzle_pdo_mysql, sqlanywhere, sqlsrv

cache:clear [--no-warmup] [--no-optional-warmers] [-h|--help] [-q|--quiet] [-v|vv|vvv|--verbose] [-V|--version] [--ansi] [--no-ansi] [-n|--no-interaction] [-e|--env ENV] [--no-debug] [--]

[root@aloktesting pim-community-standard]#