Trying to troubleshoot a MariaDB query. We did an explain select
on the select. A couple of the rows in the output have value ref|filter
for the type
column.
What does this mean? The MariaDB docs mention ref
but make no mention of filter
or ref|filter
as a possible value for this column.
Using MariaDB 10.5
This is rowid filtering where the filter refers the usage of the second index.