See L<DBIx::Class::Schema::Loader> and L<DBIx::Class::Schema::Loader::Base> for
usage information.
+=head1 CASE SENSITIVITY
+
+Most MSSQL databases use C<CI> (case-insensitive) collation, for this reason
+generated column names are lower-cased as this makes them easier to work with
+in L<DBIx::Class>.
+
+We attempt to detect the database collation at startup, and set the column
+lowercasing behavior accordingly, as lower-cased column names do not work on
+case-sensitive databases.
+
+To manually set or unset case-sensitive mode, put:
+
+ case_sensitive_collation => 1
+
+in your Loader options.
+
=cut
sub _is_case_sensitive {
$self->next::method;
+ return if defined $self->case_sensitive_collation;
+
my $dbh = $self->schema->storage->dbh;
# We use the sys.databases query for the general case, and fallback to
# which does not work over DBD::ODBC with unixODBC+FreeTDS.
#
# XXX why does databasepropertyex() not work over DBD::ODBC ?
+ #
+ # more on collations here: http://msdn.microsoft.com/en-us/library/ms143515.aspx
my ($collation_name) =
eval { $dbh->selectrow_array('SELECT collation_name FROM sys.databases WHERE name = DB_NAME()') }
- || eval { $dbh->selectrow_array("SELECT databasepropertyex(DB_NAME(), 'collation')") };
+ || eval { $dbh->selectrow_array("SELECT CAST(databasepropertyex(DB_NAME(), 'Collation') AS VARCHAR)") };
if (not $collation_name) {
- $self->case_sensitive_collation(0); # most likely not
+ warn <<'EOF';
+
+WARNING: MSSQL Collation detection failed. Defaulting to case-insensitive mode.
+Override the 'case_sensitive_collation' attribute in your Loader options if
+needed.
+EOF
+ $self->case_sensitive_collation(0);
return;
}
- my ($sensitivity) = $collation_name =~ /(C\w)_[A-z]+\z/;
+ my $case_sensitive = $collation_name =~ /_(?:CS|BIN2?)(?:_|\z)/;
- $self->case_sensitive_collation($sensitivity eq 'CS' ? 1 : 0);
+ $self->case_sensitive_collation($case_sensitive ? 1 : 0);
}
sub _lc {
my $dbh = $self->schema->storage->dbh;
my $sth = $dbh->prepare(<<'EOF');
SELECT t.table_name
-FROM information_schema.tables t
+FROM INFORMATION_SCHEMA.TABLES t
WHERE lower(t.table_schema) = ?
EOF
$sth->execute(lc $self->db_schema);
my $sth = $dbh->prepare(qq{
SELECT ccu.constraint_name, ccu.column_name
-FROM information_schema.constraint_column_usage ccu
-JOIN information_schema.table_constraints tc on (ccu.constraint_name = tc.constraint_name)
-JOIN information_schema.key_column_usage kcu on (ccu.constraint_name = kcu.constraint_name and ccu.column_name = kcu.column_name)
+FROM INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE ccu
+JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc on (ccu.constraint_name = tc.constraint_name)
+JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE kcu on (ccu.constraint_name = kcu.constraint_name and ccu.column_name = kcu.column_name)
wHERE lower(ccu.table_name) = @{[ $dbh->quote(lc $table) ]} AND constraint_type = 'UNIQUE' ORDER BY kcu.ordinal_position
});
$sth->execute;
my $sth = $dbh->prepare(qq{
SELECT column_name
-FROM information_schema.columns
+FROM INFORMATION_SCHEMA.COLUMNS
WHERE columnproperty(object_id(@{[ $dbh->quote(lc $table) ]}, 'U'), @{[ $dbh->quote(lc $col) ]}, 'IsIdentity') = 1
AND lower(table_name) = @{[ $dbh->quote(lc $table) ]} AND lower(column_name) = @{[ $dbh->quote(lc $col) ]}
});
# get default
$sth = $dbh->prepare(qq{
SELECT column_default
-FROM information_schema.columns
+FROM INFORMATION_SCHEMA.COLUMNS
wHERE lower(table_name) = @{[ $dbh->quote(lc $table) ]} AND lower(column_name) = @{[ $dbh->quote(lc $col) ]}
});
my ($default) = eval { $sth->execute; $sth->fetchrow_array };