From: Peter Rabbitson <ribasushi@cpan.org>
Date: Thu, 22 Mar 2012 08:42:24 +0000 (+0100)
Subject: Remove all "magic number" DBI get_info calls from the codebase
X-Git-Tag: v0.08197~73
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=af1f4f842ae446a3339b92b33851ea80c928f17a;p=dbsrgits%2FDBIx-Class.git

Remove all "magic number" DBI get_info calls from the codebase
---

diff --git a/lib/DBIx/Class/Storage/DBI.pm b/lib/DBIx/Class/Storage/DBI.pm
index 7a43db2..1566fec 100644
--- a/lib/DBIx/Class/Storage/DBI.pm
+++ b/lib/DBIx/Class/Storage/DBI.pm
@@ -16,6 +16,7 @@ use Context::Preserve 'preserve_context';
 use Try::Tiny;
 use overload ();
 use Data::Compare (); # no imports!!! guard against insane architecture
+use DBI::Const::GetInfoType (); # no import of retarded global hash
 use namespace::clean;
 
 # default cursor class, overridable in connect_info attributes
@@ -1106,12 +1107,18 @@ sub _server_info {
 }
 
 sub _get_server_version {
-  shift->_dbh_get_info(18);
+  shift->_dbh_get_info('SQL_DBMS_VER');
 }
 
 sub _dbh_get_info {
   my ($self, $info) = @_;
 
+  if ($info =~ /[^0-9]/) {
+    $info = $DBI::Const::GetInfoType::GetInfoType{$info};
+    $self->throw_exception("Info type '$_[1]' not provided by DBI::Const::GetInfoType")
+      unless defined $info;
+  }
+
   return try { $self->_get_dbh->get_info($info) } || undef;
 }
 
diff --git a/lib/DBIx/Class/Storage/DBI/ADO.pm b/lib/DBIx/Class/Storage/DBI/ADO.pm
index 577d2d3..8cca22d 100644
--- a/lib/DBIx/Class/Storage/DBI/ADO.pm
+++ b/lib/DBIx/Class/Storage/DBI/ADO.pm
@@ -22,7 +22,7 @@ should be transparent to the user.
 sub _rebless {
   my $self = shift;
 
-  my $dbtype = $self->_dbh_get_info(17);
+  my $dbtype = $self->_dbh_get_info('SQL_DBMS_NAME');
 
   if (not $dbtype) {
     warn "Unable to determine ADO driver, failling back to generic support.\n";
diff --git a/lib/DBIx/Class/Storage/DBI/DB2.pm b/lib/DBIx/Class/Storage/DBI/DB2.pm
index aea773f..7634eb6 100644
--- a/lib/DBIx/Class/Storage/DBI/DB2.pm
+++ b/lib/DBIx/Class/Storage/DBI/DB2.pm
@@ -18,7 +18,7 @@ sub sql_name_sep {
   my $v = $self->next::method(@_);
 
   if (! defined $v and ! @_) {
-    $v = $self->next::method($self->_dbh_get_info(41) || '.');
+    $v = $self->next::method($self->_dbh_get_info('SQL_QUALIFIER_NAME_SEPARATOR') || '.');
   }
 
   return $v;
diff --git a/lib/DBIx/Class/Storage/DBI/ODBC.pm b/lib/DBIx/Class/Storage/DBI/ODBC.pm
index 0f3259e..fec6613 100644
--- a/lib/DBIx/Class/Storage/DBI/ODBC.pm
+++ b/lib/DBIx/Class/Storage/DBI/ODBC.pm
@@ -7,7 +7,7 @@ use mro 'c3';
 sub _rebless {
   my ($self) = @_;
 
-  if (my $dbtype = $self->_dbh_get_info(17)) {
+  if (my $dbtype = $self->_dbh_get_info('SQL_DBMS_NAME')) {
     # Translate the backend name into a perl identifier
     $dbtype =~ s/\W/_/gi;
     my $subclass = "DBIx::Class::Storage::DBI::ODBC::${dbtype}";
diff --git a/lib/DBIx/Class/Storage/DBI/ODBC/Microsoft_SQL_Server.pm b/lib/DBIx/Class/Storage/DBI/ODBC/Microsoft_SQL_Server.pm
index 7aff37c..e94c938 100644
--- a/lib/DBIx/Class/Storage/DBI/ODBC/Microsoft_SQL_Server.pm
+++ b/lib/DBIx/Class/Storage/DBI/ODBC/Microsoft_SQL_Server.pm
@@ -287,7 +287,7 @@ sub using_freetds {
   $dsn = '' if ref $dsn eq 'CODE';
 
   return 1 if $dsn =~ /driver=FreeTDS/i
-              || ($self->_dbh_get_info(6)||'') =~ /tdsodbc/i;
+              || ($self->_dbh_get_info('SQL_DRIVER_NAME')||'') =~ /tdsodbc/i;
 
   return 0;
 }
diff --git a/lib/DBIx/Class/Storage/DBI/mysql.pm b/lib/DBIx/Class/Storage/DBI/mysql.pm
index a0c0b52..dc7ff90 100644
--- a/lib/DBIx/Class/Storage/DBI/mysql.pm
+++ b/lib/DBIx/Class/Storage/DBI/mysql.pm
@@ -58,7 +58,7 @@ sub sql_maker {
     my $maker = $self->next::method (@_);
 
     # mysql 3 does not understand a bare JOIN
-    my $mysql_ver = $self->_dbh_get_info(18);
+    my $mysql_ver = $self->_dbh_get_info('SQL_DBMS_VER');
     $maker->{_default_jointype} = 'INNER' if $mysql_ver =~ /^3/;
   }
 
diff --git a/t/53lean_startup.t b/t/53lean_startup.t
index f1752f4..30f1d90 100644
--- a/t/53lean_startup.t
+++ b/t/53lean_startup.t
@@ -51,6 +51,7 @@ BEGIN {
     Data::Compare
 
     DBI
+    DBI::Const::GetInfoType
     SQL::Abstract
 
     Carp
diff --git a/t/71mysql.t b/t/71mysql.t
index b4f01f4..c656a7f 100644
--- a/t/71mysql.t
+++ b/t/71mysql.t
@@ -173,15 +173,10 @@ $schema->populate ('BooksInLibrary', [
 }
 
 SKIP: {
-    my $mysql_version = $dbh->get_info( $GetInfoType{SQL_DBMS_VER} );
-    skip "Cannot determine MySQL server version", 1 if !$mysql_version;
+    my $norm_version = $schema->storage->_server_info->{normalized_dbms_version}
+      or skip "Cannot determine MySQL server version", 1;
 
-    my ($v1, $v2, $v3) = $mysql_version =~ /^(\d+)\.(\d+)(?:\.(\d+))?/;
-    skip "Cannot determine MySQL server version", 1 if !$v1 || !defined($v2);
-
-    $v3 ||= 0;
-
-    if( ($v1 < 5) || ($v1 == 5 && $v2 == 0 && $v3 <= 3) ) {
+    if ($norm_version < 5.000003_01) {
         $test_type_info->{charfield}->{data_type} = 'VARCHAR';
     }
 
diff --git a/t/72pg.t b/t/72pg.t
index 5e2f08f..5e4ec84 100644
--- a/t/72pg.t
+++ b/t/72pg.t
@@ -91,14 +91,12 @@ DBICTest::Schema->load_classes( map {s/.+:://;$_} @test_classes ) if @test_class
 
 # check if we indeed do support stuff
 my $test_server_supports_insert_returning = do {
-  my $v = DBICTest::Schema->connect($dsn, $user, $pass)
-                   ->storage
-                    ->_get_dbh
-                     ->get_info(18);
-  $v =~ /^(\d+)\.(\d+)/
-    or die "Unparseable Pg server version: $v\n";
-
-  ( sprintf ('%d.%d', $1, $2) >= 8.2 ) ? 1 : 0;
+
+  my $si = DBICTest::Schema->connect($dsn, $user, $pass)->storage->_server_info;
+  die "Unparseable Pg server version: $si->{dbms_version}\n"
+    unless $si->{normalized_dbms_version};
+
+  $si->{normalized_dbms_version} < 8.002 ? 0 : 1;
 };
 is (
   DBICTest::Schema->connect($dsn, $user, $pass)->storage->_use_insert_returning,
diff --git a/t/73oracle.t b/t/73oracle.t
index 7028e95..1866a3d 100644
--- a/t/73oracle.t
+++ b/t/73oracle.t
@@ -74,11 +74,9 @@ DBICTest::Schema::Track->load_components('PK::Auto::Oracle');
 
 # check if we indeed do support stuff
 my $v = do {
-  my $v = DBICTest::Schema->connect($dsn, $user, $pass)->storage->_dbh_get_info(18);
-  $v =~ /^(\d+)\.(\d+)/
-    or die "Unparseable Oracle server version: $v\n";
-
-  sprintf('%d.%03d', $1, $2);
+  my $si = DBICTest::Schema->connect($dsn, $user, $pass)->storage->_server_info;
+  $si->{normalized_dbms_version}
+    or die "Unparseable Oracle server version: $si->{dbms_version}\n";
 };
 
 my $test_server_supports_only_orajoins = $v < 9;
diff --git a/t/73oracle_blob.t b/t/73oracle_blob.t
index 46d91f1..c94cec3 100644
--- a/t/73oracle_blob.t
+++ b/t/73oracle_blob.t
@@ -24,12 +24,11 @@ $ENV{NLS_COMP} = "BINARY";
 $ENV{NLS_LANG} = "AMERICAN";
 
 my $v = do {
-  my $v = DBICTest::Schema->connect($dsn, $user, $pass)->storage->_dbh_get_info(18);
-  $v =~ /^(\d+)\.(\d+)/
-    or die "Unparseable Oracle server version: $v\n";
-
-  sprintf('%d.%03d', $1, $2);
+  my $si = DBICTest::Schema->connect($dsn, $user, $pass)->storage->_server_info;
+  $si->{normalized_dbms_version}
+    or die "Unparseable Oracle server version: $si->{dbms_version}\n";
 };
+
 ##########
 # the recyclebin (new for 10g) sometimes comes in the way
 my $on_connect_sql = $v >= 10 ? ["ALTER SESSION SET recyclebin = OFF"] : [];
diff --git a/t/745db2.t b/t/745db2.t
index 573fe0e..12e7045 100644
--- a/t/745db2.t
+++ b/t/745db2.t
@@ -20,10 +20,11 @@ plan skip_all => 'Set $ENV{DBICTEST_DB2_DSN}, _USER and _PASS to run this test'
 
 my $schema = DBICTest::Schema->connect($dsn, $user, $pass);
 
+my $name_sep = $schema->storage->_dbh_get_info('SQL_QUALIFIER_NAME_SEPARATOR');
+
 my $dbh = $schema->storage->dbh;
 
 # test RNO and name_sep detection
-my $name_sep = $dbh->get_info(41);
 
 is $schema->storage->sql_maker->name_sep, $name_sep,
   'name_sep detection';
diff --git a/t/sqlmaker/quotes/quotes.t b/t/sqlmaker/quotes/quotes.t
index 0b6716a..1566a7d 100644
--- a/t/sqlmaker/quotes/quotes.t
+++ b/t/sqlmaker/quotes/quotes.t
@@ -11,8 +11,6 @@ use_ok('DBICTest');
 use_ok('DBIC::DebugObj');
 my $schema = DBICTest->init_schema();
 
-#diag('Testing against ' . join(' ', map { $schema->storage->dbh->get_info($_) } qw/17 18/));
-
 $schema->storage->sql_maker->quote_char('`');
 $schema->storage->sql_maker->name_sep('.');
 
diff --git a/t/sqlmaker/quotes/quotes_newstyle.t b/t/sqlmaker/quotes/quotes_newstyle.t
index 6d448ea..c122517 100644
--- a/t/sqlmaker/quotes/quotes_newstyle.t
+++ b/t/sqlmaker/quotes/quotes_newstyle.t
@@ -11,8 +11,6 @@ use_ok('DBIC::DebugObj');
 
 my $schema = DBICTest->init_schema();
 
-#diag('Testing against ' . join(' ', map { $schema->storage->dbh->get_info($_) } qw/17 18/));
-
 my $dsn = $schema->storage->_dbi_connect_info->[0];
 $schema->connection(
   $dsn,