Provided by: libdbix-class-helpers-perl_2.033004-1_all bug

NAME

       DBIx::Class::Helper::ResultSet::Explain - Get query plan for a ResultSet

SYNOPSIS

       This module mostly makes sense to be used without setting as a component:

        use Devel::Dwarn;
        Dwarn DBIx::Class::ResultSet::Explain::explain($rs)

       But as usual, if you prefer to use it as a component here's how:

        package MyApp::Schema::ResultSet::Foo;

        __PACKAGE__->load_components(qw{Helper::ResultSet::Explain});

        ...

        1;

       And then in a script or something:

        use Devel::Dwarn;
        Dwarn $rs->explain;

DESCRIPTION

       This is just a handy little tool that gives you the query plan for a given ResultSet.  The
       output is in no way normalized, so just treat it as a debug tool or something.  The only
       supported DB's are those listed below.  Have fun!

       See "NOTE" in DBIx::Class::Helper::ResultSet for a nice way to apply it to your entire
       schema.

EXAMPLE OUTPUT FROM SUPPORTED DB's

   SQlite
        [
          [
            0,
            "Init",
            0,
            11,
            0,
            "",
            "00",
            undef,
          ],
          [
            1,
            "OpenRead",
            0,
            3,
            0,
            4,
            "00",
            undef,
          ],
          [
            2,
            "Rewind",
            0,
            9,
            0,
            "",
            "00",
            undef,
          ],
          [
            3,
            "Rowid",
            0,
            1,
            0,
            "",
            "00",
            undef,
          ],
          [
            4,
            "Column",
            0,
            1,
            2,
            "",
            "00",
            undef,
          ],
          [
            5,
            "Column",
            0,
            2,
            3,
            "",
            "00",
            undef,
          ],
          [
            6,
            "Column",
            0,
            3,
            4,
            "",
            "00",
            undef,
          ],
          [
            7,
            "ResultRow",
            1,
            4,
            0,
            "",
            "00",
            undef,
          ],
          [
            8,
            "Next",
            0,
            3,
            0,
            "",
            "01",
            undef,
          ],
          [
            9,
            "Close",
            0,
            0,
            0,
            "",
            "00",
            undef,
          ],
          [
            10,
            "Halt",
            0,
            0,
            0,
            "",
            "00",
            undef,
          ],
          [
            11,
            "Transaction",
            0,
            0,
            17,
            0,
            "01",
            undef,
          ],
          [
            12,
            "TableLock",
            0,
            3,
            0,
            "Gnarly",
            "00",
            undef,
          ],
          [
            13,
            "Goto",
            0,
            1,
            0,
            "",
            "00",
            undef,
          ],
        ]

   Pg
        [
          [
            "Seq Scan on \"Gnarly\" me  (cost=0.00..16.20 rows=620 width=100) (actual time=0.001..0.001 rows=0 loops=1)",
          ],
          [
            "Planning time: 0.216 ms",
          ],
          [
            "Execution time: 0.014 ms",
          ],
        ]

   mysql
        [
          [
            1,
            "SIMPLE",
            "me",
            "ALL",
            undef,
            undef,
            undef,
            undef,
            1,
            100,
            "",
          ],
        ]

AUTHOR

       Arthur Axel "fREW" Schmidt <frioux+cpan@gmail.com>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2018 by Arthur Axel "fREW" Schmidt.

       This is free software; you can redistribute it and/or modify it under the same terms as
       the Perl 5 programming language system itself.

perl v5.26.1                                2018-04-1DBIx::Class::Helper::ResultSet::Explain(3pm)