log_slow_verbosity='innodb'

Hi, documentation for log_slow_verbosity https://mariadb.com/kb/en/library/server-system-variables/#log_slow_verbosity mentions "innodb" as one of possible values, however I don't see any new values in the slowlog file. log_slow_verbosity='explain' works fine, but log_slow_verbosity='innodb' doesn't seem to make any difference.

# User@Host: sbtest[sbtest] @ localhost []

# Thread_id: 1529055  Schema: onlineddl  QC_hit: No

# Query_time: 0.007609  Lock_time: 0.000062  Rows_sent: 0  Rows_examined: 1

# Rows_affected: 1

SET timestamp=1518806988;

DELETE FROM sbtest1 WHERE id=100798;