**Comment from Launchpad by: Daniel Nichter on: 12-06-2012 00:44:50

This option has been removed in 2.1.2. It wasn't connected to any code anyway, so removing it didn't affect any functionality or output.

**Comment from Launchpad by: Baron Schwartz on: 04-03-2012 23:50:01

I believe it's OK to remove this option. Let's target it for the next milestone, and during that time, we can write some code in OptionParser.pm to warn when a deprecated option is removed, eg:

--item --zero-bool

deprecated: yes; blah: blah

When such an option is given on the command line or in a file, the tool should print to STDERR something like this:

Warning: option '--zero-bool' is deprecated and will be removed in the next version of Percona Toolkit.

**Comment from Launchpad by: Daniel Nichter on: 01-03-2012 17:22:01

Iirc, mk-query-digest used to print bools like "Full scan %0", i.e. just one value, the %true. That could result in "Full scan 0%" because all events were "Full_scan: No". So --no-zero-bool would suppress lines like "Full scan %0". However, the output format changed as early as pt-query-digest 1.0 because now the bools are like "Full scan 0% yes, 100% no". Since both %true(yes) and %false(no) are printed, there are no longer just zero lines, so --[no]zero-bool is useless. The option hasn't worked, so we might as well just remove it from the POD.