X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI.pm;h=84dc7b887a9eafd1b4ed793827bc459af36f2c71;hb=2cc3a7be3;hp=aad03533038c371065e917e87599dd09954ecadd;hpb=2a57124dc95b1f1b8b2c2e6003a42b5777c462e4;p=dbsrgits%2FDBIx-Class.git
diff --git a/lib/DBIx/Class/Storage/DBI.pm b/lib/DBIx/Class/Storage/DBI.pm
index aad0353..84dc7b8 100644
--- a/lib/DBIx/Class/Storage/DBI.pm
+++ b/lib/DBIx/Class/Storage/DBI.pm
@@ -8,19 +8,40 @@ use warnings;
use DBI;
use SQL::Abstract::Limit;
use DBIx::Class::Storage::DBI::Cursor;
+use DBIx::Class::Storage::Statistics;
use IO::File;
use Carp::Clan qw/DBIx::Class/;
-
BEGIN {
package DBIC::SQL::Abstract; # Would merge upstream, but nate doesn't reply :(
use base qw/SQL::Abstract::Limit/;
+# This prevents the caching of $dbh in S::A::L, I believe
+sub new {
+ my $self = shift->SUPER::new(@_);
+
+ # If limit_dialect is a ref (like a $dbh), go ahead and replace
+ # it with what it resolves to:
+ $self->{limit_dialect} = $self->_find_syntax($self->{limit_dialect})
+ if ref $self->{limit_dialect};
+
+ $self;
+}
+
+# While we're at it, this should make LIMIT queries more efficient,
+# without digging into things too deeply
+sub _find_syntax {
+ my ($self, $syntax) = @_;
+ $self->{_cached_syntax} ||= $self->SUPER::_find_syntax($syntax);
+}
+
sub select {
my ($self, $table, $fields, $where, $order, @rest) = @_;
$table = $self->_quote($table) unless ref($table);
@rest = (-1) unless defined $rest[0];
+ die "LIMIT 0 Does Not Compute" if $rest[0] == 0;
+ # and anyway, SQL::Abstract::Limit will cause a barf if we don't first
local $self->{having_bind} = [];
my ($sql, @ret) = $self->SUPER::select(
$table, $self->_recurse_fields($fields), $where, $order, @rest
@@ -131,8 +152,9 @@ sub _recurse_from {
# check whether a join type exists
my $join_clause = '';
- if (ref($to) eq 'HASH' and exists($to->{-join_type})) {
- $join_clause = ' '.uc($to->{-join_type}).' JOIN ';
+ my $to_jt = ref($to) eq 'ARRAY' ? $to->[0] : $to;
+ if (ref($to_jt) eq 'HASH' and exists($to_jt->{-join_type})) {
+ $join_clause = ' '.uc($to_jt->{-join_type}).' JOIN ';
} else {
$join_clause = ' JOIN ';
}
@@ -201,10 +223,6 @@ sub _RowNum {
$self->SUPER::_RowNum(@_);
}
-# Accessor for setting limit dialect. This is useful
-# for JDBC-bridge among others where the remote SQL-dialect cannot
-# be determined by the name of the driver alone.
-#
sub limit_dialect {
my $self = shift;
$self->{limit_dialect} = shift if @_;
@@ -223,111 +241,224 @@ sub name_sep {
return $self->{name_sep};
}
+} # End of BEGIN block
+
+use base qw/DBIx::Class/;
+__PACKAGE__->load_components(qw/AccessorGroup/);
+__PACKAGE__->mk_group_accessors('simple' =>
+ qw/_connect_info _dbh _sql_maker _sql_maker_opts _conn_pid _conn_tid
+ debug debugobj cursor on_connect_do transaction_depth/);
-package DBIx::Class::Storage::DBI::DebugCallback;
+=head1 NAME
-sub print {
- my ($self, $string) = @_;
- $string =~ m/^(\w+)/;
- ${$self}->($1, $string);
-}
+DBIx::Class::Storage::DBI - DBI storage handler
-} # End of BEGIN block
+=head1 SYNOPSIS
-use base qw/DBIx::Class/;
+=head1 DESCRIPTION
-__PACKAGE__->load_components(qw/AccessorGroup/);
+This class represents the connection to the database
-__PACKAGE__->mk_group_accessors('simple' =>
- qw/_connect_info _dbh _sql_maker _conn_pid _conn_tid debug debugfh
- cursor on_connect_do transaction_depth/);
+=head1 METHODS
+
+=head2 new
+
+=cut
sub new {
my $new = bless({}, ref $_[0] || $_[0]);
$new->cursor("DBIx::Class::Storage::DBI::Cursor");
$new->transaction_depth(0);
- if (defined($ENV{DBIX_CLASS_STORAGE_DBI_DEBUG}) &&
- ($ENV{DBIX_CLASS_STORAGE_DBI_DEBUG} =~ /=(.+)$/)) {
- $new->debugfh(IO::File->new($1, 'w'))
+
+ $new->debugobj(new DBIx::Class::Storage::Statistics());
+
+ my $fh;
+
+ my $debug_env = $ENV{DBIX_CLASS_STORAGE_DBI_DEBUG}
+ || $ENV{DBIC_TRACE};
+
+ if (defined($debug_env) && ($debug_env =~ /=(.+)$/)) {
+ $fh = IO::File->new($1, 'w')
or $new->throw_exception("Cannot open trace file $1");
} else {
- $new->debugfh(IO::File->new('>&STDERR'));
+ $fh = IO::File->new('>&STDERR');
}
- $new->debug(1) if $ENV{DBIX_CLASS_STORAGE_DBI_DEBUG};
+ $new->debugfh($fh);
+ $new->debug(1) if $debug_env;
+ $new->_sql_maker_opts({});
return $new;
}
+=head2 throw_exception
+
+Throws an exception - croaks.
+
+=cut
+
sub throw_exception {
my ($self, $msg) = @_;
croak($msg);
}
-=head1 NAME
+=head2 connect_info
-DBIx::Class::Storage::DBI - DBI storage handler
+The arguments of C are always a single array reference.
-=head1 SYNOPSIS
+This is normally accessed via L, which
+encapsulates its argument list in an arrayref before calling
+C here.
-=head1 DESCRIPTION
+The arrayref can either contain the same set of arguments one would
+normally pass to L, or a lone code reference which returns
+a connected database handle.
-This class represents the connection to the database
+In either case, if the final argument in your connect_info happens
+to be a hashref, C will look there for several
+connection-specific options:
-=head1 METHODS
+=over 4
-=cut
+=item on_connect_do
-=head2 connect_info
+This can be set to an arrayref of literal sql statements, which will
+be executed immediately after making the connection to the database
+every time we [re-]connect.
+
+=item limit_dialect
+
+Sets the limit dialect. This is useful for JDBC-bridge among others
+where the remote SQL-dialect cannot be determined by the name of the
+driver alone.
+
+=item quote_char
-Connection information arrayref. Can either be the same arguments
-one would pass to DBI->connect, or a code-reference which returns
-a connected database handle. In either case, there is an optional
-final element in the arrayref, which can hold a hashref of
-connection-specific Storage::DBI options. These include
-C, and the sql_maker options C,
-C, and C. Examples:
+Specifies what characters to use to quote table and column names. If
+you use this you will want to specify L as well.
+quote_char expects either a single character, in which case is it is placed
+on either side of the table/column, or an arrayref of length 2 in which case the
+table/column name is placed between the elements.
+
+For example under MySQL you'd use C '`'>, and user SQL Server you'd
+use C [qw/[ ]/]>.
+
+=item name_sep
+
+This only needs to be used in conjunction with L, and is used to
+specify the charecter that seperates elements (schemas, tables, columns) from
+each other. In most cases this is simply a C<.>.
+
+=back
+
+These options can be mixed in with your other L connection attributes,
+or placed in a seperate hashref after all other normal L connection
+arguments.
+
+Every time C is invoked, any previous settings for
+these options will be cleared before setting the new ones, regardless of
+whether any options are specified in the new C.
+
+Examples:
+
+ # Simple SQLite connection
->connect_info([ 'dbi:SQLite:./foo.db' ]);
- ->connect_info(sub { DBI->connect(...) });
- ->connect_info([ 'dbi:Pg:dbname=foo',
- 'postgres',
- '',
- { AutoCommit => 0 },
- { quote_char => q{`}, name_sep => q{@} },
- ]);
+
+ # Connect via subref
+ ->connect_info([ sub { DBI->connect(...) } ]);
+
+ # A bit more complicated
+ ->connect_info(
+ [
+ 'dbi:Pg:dbname=foo',
+ 'postgres',
+ 'my_pg_password',
+ { AutoCommit => 0 },
+ { quote_char => q{"}, name_sep => q{.} },
+ ]
+ );
+
+ # Equivalent to the previous example
+ ->connect_info(
+ [
+ 'dbi:Pg:dbname=foo',
+ 'postgres',
+ 'my_pg_password',
+ { AutoCommit => 0, quote_char => q{"}, name_sep => q{.} },
+ ]
+ );
+
+ # Subref + DBIC-specific connection options
+ ->connect_info(
+ [
+ sub { DBI->connect(...) },
+ {
+ quote_char => q{`},
+ name_sep => q{@},
+ on_connect_do => ['SET search_path TO myschema,otherschema,public'],
+ },
+ ]
+ );
=head2 on_connect_do
-Executes the sql statements given as a listref on every db connect.
+This method is deprecated in favor of setting via L.
=head2 debug
-Causes SQL trace information to be emitted on C filehandle
-(or C if C has not specifically been set).
+Causes SQL trace information to be emitted on the C object.
+(or C if C has not specifically been set).
=head2 debugfh
-Sets or retrieves the filehandle used for trace/debug output. This
-should be an IO::Handle compatible object (only the C method is
-used). Initially set to be STDERR - although see information on the
-L environment variable.
+Set or retrieve the filehandle used for trace/debug output. This should be
+an IO::Handle compatible ojbect (only the C method is used. Initially
+set to be STDERR - although see information on the
+L environment variable.
+
+=cut
+
+sub debugfh {
+ my $self = shift;
+
+ if ($self->debugobj->can('debugfh')) {
+ return $self->debugobj->debugfh(@_);
+ }
+}
+
+=head2 debugobj
+
+Sets or retrieves the object used for metric collection. Defaults to an instance
+of L that is campatible with the original
+method of using a coderef as a callback. See the aforementioned Statistics
+class for more information.
=head2 debugcb
Sets a callback to be executed each time a statement is run; takes a sub
-reference. Overrides debugfh. Callback is executed as $sub->($op, $info)
-where $op is SELECT/INSERT/UPDATE/DELETE and $info is what would normally
-be printed.
+reference. Callback is executed as $sub->($op, $info) where $op is
+SELECT/INSERT/UPDATE/DELETE and $info is what would normally be printed.
+
+See L for a better way.
=cut
sub debugcb {
- my ($self, $cb) = @_;
- my $cb_obj = bless(\$cb, 'DBIx::Class::Storage::DBI::DebugCallback');
- $self->debugfh($cb_obj);
+ my $self = shift;
+
+ if ($self->debugobj->can('callback')) {
+ return $self->debugobj->callback(@_);
+ }
}
+=head2 disconnect
+
+Disconnect the L handle, performing a rollback first if the
+database is not in C mode.
+
+=cut
+
sub disconnect {
my ($self) = @_;
@@ -338,18 +469,22 @@ sub disconnect {
}
}
-sub connected {
- my ($self) = @_;
+=head2 connected
+
+Check if the L handle is connected. Returns true if the handle
+is connected.
+
+=cut
+
+sub connected { my ($self) = @_;
if(my $dbh = $self->_dbh) {
if(defined $self->_conn_tid && $self->_conn_tid != threads->tid) {
- $self->_sql_maker(undef);
return $self->_dbh(undef);
}
elsif($self->_conn_pid != $$) {
$self->_dbh->{InactiveDestroy} = 1;
- $self->_sql_maker(undef);
- return $self->_dbh(undef)
+ return $self->_dbh(undef);
}
return ($dbh->FETCH('Active') && $dbh->ping);
}
@@ -357,6 +492,13 @@ sub connected {
return 0;
}
+=head2 ensure_connected
+
+Check whether the database handle is connected - if not then make a
+connection.
+
+=cut
+
sub ensure_connected {
my ($self) = @_;
@@ -378,58 +520,76 @@ sub dbh {
return $self->_dbh;
}
+sub _sql_maker_args {
+ my ($self) = @_;
+
+ return ( limit_dialect => $self->dbh, %{$self->_sql_maker_opts} );
+}
+
+=head2 sql_maker
+
+Returns a C object - normally an object of class
+C.
+
+=cut
+
sub sql_maker {
my ($self) = @_;
unless ($self->_sql_maker) {
- $self->_sql_maker(new DBIC::SQL::Abstract( limit_dialect => $self->dbh ));
+ $self->_sql_maker(new DBIC::SQL::Abstract( $self->_sql_maker_args ));
}
return $self->_sql_maker;
}
sub connect_info {
- my ($self, $info_arg) = @_;
-
- if($info_arg) {
- my $info = [ @$info_arg ]; # copy because we can alter it
- my $last_info = $info->[-1];
- if(ref $last_info eq 'HASH') {
- my $used;
- if(my $on_connect_do = $last_info->{on_connect_do}) {
- $used = 1;
- $self->on_connect_do($on_connect_do);
- }
- for my $sql_maker_opt (qw/limit_dialect quote_char name_sep/) {
- if(my $opt_val = $last_info->{$sql_maker_opt}) {
- $used = 1;
- $self->sql_maker->$sql_maker_opt($opt_val);
- }
- }
-
- # remove our options hashref if it was there, to avoid confusing
- # DBI in the case the user didn't use all 4 DBI options, as in:
- # [ 'dbi:SQLite:foo.db', { quote_char => q{`} } ]
- pop(@$info) if $used;
+ my ($self, $info_arg) = @_;
+
+ if($info_arg) {
+ # Kill sql_maker/_sql_maker_opts, so we get a fresh one with only
+ # the new set of options
+ $self->_sql_maker(undef);
+ $self->_sql_maker_opts({});
+
+ my $info = [ @$info_arg ]; # copy because we can alter it
+ my $last_info = $info->[-1];
+ if(ref $last_info eq 'HASH') {
+ if(my $on_connect_do = delete $last_info->{on_connect_do}) {
+ $self->on_connect_do($on_connect_do);
+ }
+ for my $sql_maker_opt (qw/limit_dialect quote_char name_sep/) {
+ if(my $opt_val = delete $last_info->{$sql_maker_opt}) {
+ $self->_sql_maker_opts->{$sql_maker_opt} = $opt_val;
}
+ }
- $self->_connect_info($info);
+ # Get rid of any trailing empty hashref
+ pop(@$info) if !keys %$last_info;
}
- $self->_connect_info;
+ $self->_connect_info($info);
+ }
+
+ $self->_connect_info;
}
sub _populate_dbh {
my ($self) = @_;
my @info = @{$self->_connect_info || []};
$self->_dbh($self->_connect(@info));
- my $driver = $self->_dbh->{Driver}->{Name};
- eval "require DBIx::Class::Storage::DBI::${driver}";
- unless ($@) {
- bless $self, "DBIx::Class::Storage::DBI::${driver}";
- $self->_rebless() if $self->can('_rebless');
+
+ if(ref $self eq 'DBIx::Class::Storage::DBI') {
+ my $driver = $self->_dbh->{Driver}->{Name};
+ if ($self->load_optional_class("DBIx::Class::Storage::DBI::${driver}")) {
+ bless $self, "DBIx::Class::Storage::DBI::${driver}";
+ $self->_rebless() if $self->can('_rebless');
+ }
}
+
# if on-connect sql statements are given execute them
foreach my $sql_statement (@{$self->on_connect_do || []}) {
+ $self->debugobj->query_start($sql_statement) if $self->debug();
$self->_dbh->do($sql_statement);
+ $self->debugobj->query_end($sql_statement) if $self->debug();
}
$self->_conn_pid($$);
@@ -450,12 +610,9 @@ sub _connect {
}
eval {
- if(ref $info[0] eq 'CODE') {
- $dbh = &{$info[0]};
- }
- else {
- $dbh = DBI->connect(@info);
- }
+ $dbh = ref $info[0] eq 'CODE'
+ ? &{$info[0]}
+ : DBI->connect(@info);
};
$DBI::connect_via = $old_connect_via if $old_connect_via;
@@ -481,7 +638,7 @@ sub txn_begin {
if ($self->{transaction_depth}++ == 0) {
my $dbh = $self->dbh;
if ($dbh->{AutoCommit}) {
- $self->debugfh->print("BEGIN WORK\n")
+ $self->debugobj->txn_begin()
if ($self->debug);
$dbh->begin_work;
}
@@ -496,19 +653,19 @@ Issues a commit against the current dbh.
sub txn_commit {
my $self = shift;
+ my $dbh = $self->dbh;
if ($self->{transaction_depth} == 0) {
- my $dbh = $self->dbh;
unless ($dbh->{AutoCommit}) {
- $self->debugfh->print("COMMIT\n")
+ $self->debugobj->txn_commit()
if ($self->debug);
$dbh->commit;
}
}
else {
if (--$self->{transaction_depth} == 0) {
- $self->debugfh->print("COMMIT\n")
+ $self->debugobj->txn_commit()
if ($self->debug);
- $self->dbh->commit;
+ $dbh->commit;
}
}
}
@@ -525,19 +682,19 @@ sub txn_rollback {
my $self = shift;
eval {
+ my $dbh = $self->dbh;
if ($self->{transaction_depth} == 0) {
- my $dbh = $self->dbh;
unless ($dbh->{AutoCommit}) {
- $self->debugfh->print("ROLLBACK\n")
+ $self->debugobj->txn_rollback()
if ($self->debug);
$dbh->rollback;
}
}
else {
if (--$self->{transaction_depth} == 0) {
- $self->debugfh->print("ROLLBACK\n")
+ $self->debugobj->txn_rollback()
if ($self->debug);
- $self->dbh->rollback;
+ $dbh->rollback;
}
else {
die DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION->new;
@@ -560,17 +717,19 @@ sub _execute {
unshift(@bind, @$extra_bind) if $extra_bind;
if ($self->debug) {
my @debug_bind = map { defined $_ ? qq{'$_'} : q{'NULL'} } @bind;
- $self->debugfh->print("$sql: " . join(', ', @debug_bind) . "\n");
+ $self->debugobj->query_start($sql, @debug_bind);
}
my $sth = eval { $self->sth($sql,$op) };
if (!$sth || $@) {
- $self->throw_exception('no sth generated via sql (' . ($@ || $self->_dbh->errstr) . "): $sql");
+ $self->throw_exception(
+ 'no sth generated via sql (' . ($@ || $self->_dbh->errstr) . "): $sql"
+ );
}
-
@bind = map { ref $_ ? ''.$_ : $_ } @bind; # stringify args
my $rv;
if ($sth) {
+ my $time = time();
$rv = eval { $sth->execute(@bind) };
if ($@ || !$rv) {
@@ -579,6 +738,10 @@ sub _execute {
} else {
$self->throw_exception("'$sql' did not generate a statement.");
}
+ if ($self->debug) {
+ my @debug_bind = map { defined $_ ? qq{`$_'} : q{`NULL'} } @bind;
+ $self->debugobj->query_end($sql, @debug_bind);
+ }
return (wantarray ? ($rv, $sth, @bind) : $rv);
}
@@ -618,17 +781,32 @@ sub _select {
$self->sql_maker->_default_limit_syntax eq "GenericSubQ") {
$attrs->{software_limit} = 1;
} else {
+ $self->throw_exception("rows attribute must be positive if present")
+ if (defined($attrs->{rows}) && !($attrs->{rows} > 0));
push @args, $attrs->{rows}, $attrs->{offset};
}
return $self->_execute(@args);
}
+=head2 select
+
+Handle a SQL select statement.
+
+=cut
+
sub select {
my $self = shift;
my ($ident, $select, $condition, $attrs) = @_;
return $self->cursor->new($self, \@_, $attrs);
}
+=head2 select_single
+
+Performs a select, fetch and return of data - handles a single row
+only.
+
+=cut
+
# Need to call finish() to work round broken DBDs
sub select_single {
@@ -639,6 +817,12 @@ sub select_single {
return @row;
}
+=head2 sth
+
+Returns a L sth (statement handle) for the supplied SQL.
+
+=cut
+
sub sth {
my ($self, $sql) = @_;
# 3 is the if_active parameter which avoids active sth re-use
@@ -672,8 +856,10 @@ sub columns_info_for {
$column_info{size} = $info->{COLUMN_SIZE};
$column_info{is_nullable} = $info->{NULLABLE} ? 1 : 0;
$column_info{default_value} = $info->{COLUMN_DEF};
+ my $col_name = $info->{COLUMN_NAME};
+ $col_name =~ s/^\"(.*)\"$/$1/;
- $result{$info->{COLUMN_NAME}} = \%column_info;
+ $result{$col_name} = \%column_info;
}
};
$dbh->{RaiseError} = $old_raise_err;
@@ -708,6 +894,12 @@ sub columns_info_for {
return \%result;
}
+=head2 last_insert_id
+
+Return the row id of the last insert.
+
+=cut
+
sub last_insert_id {
my ($self, $row) = @_;
@@ -715,8 +907,30 @@ sub last_insert_id {
}
+=head2 sqlt_type
+
+Returns the database driver name.
+
+=cut
+
sub sqlt_type { shift->dbh->{Driver}->{Name} }
+=head2 create_ddl_dir (EXPERIMENTAL)
+
+=over 4
+
+=item Arguments: $schema \@databases, $version, $directory, $sqlt_args
+
+=back
+
+Creates an SQL file based on the Schema, for each of the specified
+database types, in the given directory.
+
+Note that this feature is currently EXPERIMENTAL and may not work correctly
+across all databases, or fully handle complex relationships.
+
+=cut
+
sub create_ddl_dir
{
my ($self, $schema, $databases, $version, $dir, $sqltargs) = @_;
@@ -769,8 +983,17 @@ sub create_ddl_dir
}
+=head2 deployment_statements
+
+Create the statements for L and
+L.
+
+=cut
+
sub deployment_statements {
my ($self, $schema, $type, $version, $dir, $sqltargs) = @_;
+ # Need to be connected to get the correct sqlt_type
+ $self->ensure_connected() unless $type;
$type ||= $self->sqlt_type;
$version ||= $schema->VERSION || '1.x';
$dir ||= './';
@@ -803,6 +1026,14 @@ sub deployment_statements {
}
+=head2 deploy
+
+Sends the appropriate statements to create or modify tables to the
+db. This would normally be called through
+L.
+
+=cut
+
sub deploy {
my ($self, $schema, $type, $sqltargs) = @_;
foreach my $statement ( $self->deployment_statements($schema, $type, undef, undef, $sqltargs) ) {
@@ -812,26 +1043,105 @@ sub deploy {
# next if($_ =~ /^DROP/m);
next if($_ =~ /^BEGIN TRANSACTION/m);
next if($_ =~ /^COMMIT/m);
- $self->debugfh->print("$_\n") if $self->debug;
+ $self->debugobj->query_start($_) if $self->debug;
$self->dbh->do($_) or warn "SQL was:\n $_";
+ $self->debugobj->query_end($_) if $self->debug;
}
}
}
+=head2 datetime_parser
+
+Returns the datetime parser class
+
+=cut
+
+sub datetime_parser {
+ my $self = shift;
+ return $self->{datetime_parser} ||= $self->build_datetime_parser(@_);
+}
+
+=head2 datetime_parser_type
+
+Defines (returns) the datetime parser class - currently hardwired to
+L
+
+=cut
+
+sub datetime_parser_type { "DateTime::Format::MySQL"; }
+
+=head2 build_datetime_parser
+
+See L
+
+=cut
+
+sub build_datetime_parser {
+ my $self = shift;
+ my $type = $self->datetime_parser_type(@_);
+ eval "use ${type}";
+ $self->throw_exception("Couldn't load ${type}: $@") if $@;
+ return $type;
+}
+
sub DESTROY { shift->disconnect }
1;
+=head1 SQL METHODS
+
+The module defines a set of methods within the DBIC::SQL::Abstract
+namespace. These build on L to provide the
+SQL query functions.
+
+The following methods are extended:-
+
+=over 4
+
+=item delete
+
+=item insert
+
+=item select
+
+=item update
+
+=item limit_dialect
+
+See L for details.
+For setting, this method is deprecated in favor of L.
+
+=item quote_char
+
+See L for details.
+For setting, this method is deprecated in favor of L.
+
+=item name_sep
+
+See L for details.
+For setting, this method is deprecated in favor of L.
+
+=back
+
=head1 ENVIRONMENT VARIABLES
-=head2 DBIX_CLASS_STORAGE_DBI_DEBUG
+=head2 DBIC_TRACE
-If C is set then SQL trace information
+If C is set then SQL trace information
is produced (as when the L method is set).
If the value is of the form C<1=/path/name> then the trace output is
written to the file C.
+This environment variable is checked when the storage object is first
+created (when you call connect on your schema). So, run-time changes
+to this environment variable will not take effect unless you also
+re-connect on your schema.
+
+=head2 DBIX_CLASS_STORAGE_DBI_DEBUG
+
+Old name for DBIC_TRACE
+
=head1 AUTHORS
Matt S. Trout