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Logging queries for DBI
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README.md

NAME

DBIx::QueryLog - Logging queries for DBI

SYNOPSIS

use DBIx::QueryLog;
my $row = $dbh->selectrow_hashref('SELECT * FROM people WHERE user_id = ?', undef, qw/1986/);
# => SELECT * FROM people WHERE user_id = '1986';

DESCRIPTION

DBIx::QueryLog logs each execution time and the actual query.

Currently, it works with DBD::mysql, DBD::Pg and DBD::SQLite.

CLASS METHODS

  • threshold

    If set, only queries that take more time than this threshold will be logged (default is undef)

    DBIx::QueryLog->threshold(0.1); # sec
    

    You can also specify this with DBIX_QUERYLOG_THRESHOLD environment variable.

  • probability

    If set, the logger logs only once per a defined value. (default is undef)

    DBIx::QueryLog->probability(100); # about 1/100
    

    You can also specify this with DBIX_QUERYLOG_PROBABILITY environment variable.

  • logger

    Sets a logger class (e.g. Log::Dispach)

    The logger class must have a `log` method, which should work like the one of Log::Dispatch (but see also OUTPUT section below).

    DBIx::QueryLog->logger($logger);
    
  • skip_bind

    If set, DBIx::QueryLog runs faster, but placeholders are not processed.

    DBIx::QueryLog->skip_bind(1);
    my $row = $dbh->do(...);
    # => 'SELECT * FROM people WHERE user_id = ?' : [1986]
    

    You can also specify this with DBIX_QUERYLOG_SKIP_BIND environment variable.

  • color

    If set, log messages will be colored with Term::ANSIColor.

    DBIx::QueryLog->color('green');
    

    You can also specify this with DBIX_QUERYLOG_COLOR environment variable.

  • useqq

    If set, DBIx::QueryLog uses $Data::Dumper::Useqq.

    DBIx::QueryLog->useqq(1);
    

    You can also specify this with DBIX_QUERYLOG_USEQQ environment variable.

  • compact

    If set, log messages will be compact.

    DBIx::QueryLog->compact(1);
    #  FROM: SELECT          *  FROM      foo WHERE bar = 'baz'
    #  TO  : SELECT * FROM foo WHERE bar = 'baz'
    

    You can also specify this with DBIX_QUERYLOG_COMPACT environment variable.

  • explain

    EXPERIMENTAL

    If set, DBIx::QueryLog logs the result of a EXPLAIN statement.

    DBIx::QueryLog->explain(1);
    my $row = $dbh->do(...);
    # => SELECT * FROM peaple WHERE user_id = '1986'
    #  .----------------------------------------------------------------------------------------------.
    #  | id | select_type | table  | type  | possible_keys | key     | key_len | ref   | rows | Extra |
    #  +----+-------------+--------+-------+---------------+---------+---------+-------+------+-------+
    #  |  1 | SIMPLE      | peaple | const | PRIMARY       | PRIMARY |       4 | const |    1 |       |
    #  '----+-------------+--------+-------+---------------+---------+---------+-------+------+-------'
    

    You can also specify this with DBIX_QUERYLOG_EXPLAIN environment variable.

  • show_data_source

    if set, DBI data_source will be added to the log messages.

    $dbh->do('SELECT * FROM sqlite_master');
    # [2012-03-09T00:58:23] [main] [0.000953] SELECT * FROM sqlite_master at foo.pl line 34
    
    DBIx::QueryLog->show_data_source(1);
    $dbh->do('SELECT * FROM sqlite_master');
    # [2012-03-09T00:58:23] [main] [0.000953] [SQLite:dbname=/tmp/TrSATdY3cc] SELECT * FROM sqlite_master at foo.pl line 56
    

    You can also specify this with DBIX_QUERYLOG_SHOW_DATASOURCE environment variable.

  • guard

    Returns a guard object.

    use DBIx::QueryLog ();
    {
        my $guard = DBIx::QueryLog->guard;
        # ... do something
    }
    

    The following code does the same:

    use DBIx::QueryLog ();
    
    DBIx::QueryLog->enable;
    # ... do something
    DBIx::QueryLog->disable;
    
  • ignore_trace

    Returns a guard object and disables tracing while the object is alive.

    use DBIx::QueryLog;
    
    # enabled
    $dbh->do(...);
    
    {
        my $guard = DBIx::QueryLog->ignore_trace;
        # disable
        $dbh->do(...);
    }
    
    # enabled
    $dbh->do(...)
    
  • is_enabled

    Returns if DBIx::QueryLog is enabled or not.

    use DBIx::QueryLog ();
    
    say DBIx::QueryLog->is_enabled;
    
    DBIx::QueryLog->disable;
    

    See also Localization section.

TIPS

Localization

If you want to log only in a specific scope:

use DBIx::QueryLog (); # or require DBIx::QueryLog;

DBIx::QueryLog->begin; # or DBIx::QueryLog->enable
my $row = $dbh->do(...);
DBIx::QueryLog->end;   # or DBIx::QueryLog->disable

DBIx::QueryLog logs only between begin and end.

LOG_LEVEL

When you set a logger, you might also want to change a log level.

$DBIx::QueryLog::LOG_LEVEL = 'info'; # default 'debug'

OUTPUT

If you want to change where to output:

open my $fh, '>', 'dbix_query.log';
$DBIx::QueryLog::OUTPUT = $fh;

You can also specify a code reference:

$DBIx::QueryLog::OUTPUT = sub {
    my %params = @_;

    my $format = << 'FORMAT';
localtime  : %s       # ISO-8601 without timezone
level      : %s       # log level ($DBIx::QueryLog::LOG_LEVEL)
time       : %f       # elasped time
data_source: $s       # data_source
sql        : %s       # executed query
bind_params: %s       # bind parameters
pkg        : %s       # caller package
file       : %s       # caller file
line       : %d       # caller line
FORMAT

    printf $format,
        @params{qw/localtime level pkg time data_source sql/},
        join(', ', @{$params{bind_params}}),
        @params{qw/file line/};

    printf "AutoCommit?: %d\n", $params->{dbh}->{AutoCommit} ? 1 : 0;
};

You can also use this if you want to use a logger that doesn't have a log method like the one of <Log::Dispatch>.

$DBIx::QueryLog::OUTPUT = sub {
    my %params = @_;
    my $logger = Log::Any->get_logger;
    $logger->debug("$params{message}");
};

Note that this only works when <logger> is not set.

Default $OUTPUT is STDERR.

AUTHOR

xaicron

THANKS TO

tokuhirom

yibe

kamipo

tomi-ru

riywo

makamaka

BUG REPORTING

Plese use github issues: https://github.com/xaicron/p5-DBIx-QueryLog/issues.

COPYRIGHT

Copyright 2010 - xaicron

LICENSE

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

SEE ALSO

DBI

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