/usr/share/perl5/DBIx/Class/Schema/Loader/DBI/MSSQL.pm is in libdbix-class-schema-loader-perl 0.07045-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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use strict;
use warnings;
use base 'DBIx::Class::Schema::Loader::DBI::Sybase::Common';
use mro 'c3';
use Try::Tiny;
use List::Util 'any';
use namespace::clean;
use DBIx::Class::Schema::Loader::Table::Sybase ();
our $VERSION = '0.07045';
=head1 NAME
DBIx::Class::Schema::Loader::DBI::MSSQL - DBIx::Class::Schema::Loader::DBI MSSQL Implementation.
=head1 DESCRIPTION
Base driver for Microsoft SQL Server, used by
L<DBIx::Class::Schema::Loader::DBI::Sybase::Microsoft_SQL_Server> for support
via L<DBD::Sybase> and
L<DBIx::Class::Schema::Loader::DBI::ODBC::Microsoft_SQL_Server> for support via
L<DBD::ODBC>.
See L<DBIx::Class::Schema::Loader> and L<DBIx::Class::Schema::Loader::Base> for
usage information.
=head1 CASE SENSITIVITY
Most MSSQL databases use C<CI> (case-insensitive) collation, for this reason
generated column names are lower-cased as this makes them easier to work with
in L<DBIx::Class>.
We attempt to detect the database collation at startup for any database
included in L<db_schema|DBIx::Class::Schema::Loader::Base/db_schema>, and set
the column lowercasing behavior accordingly, as lower-cased column names do not
work on case-sensitive databases.
To manually control case-sensitive mode, put:
preserve_case => 1|0
in your Loader options.
See L<preserve_case|DBIx::Class::Schema::Loader::Base/preserve_case>.
B<NOTE:> this option used to be called C<case_sensitive_collation>, but has
been renamed to a more generic option.
=cut
# SQL Server 2000: Ancient as time itself, but still out in the wild
sub _is_2k {
return shift->schema->storage->_server_info->{normalized_dbms_version} < 9;
}
sub _system_databases {
return (qw/
master model tempdb msdb
/);
}
sub _system_tables {
return (qw/
spt_fallback_db spt_fallback_dev spt_fallback_usg spt_monitor spt_values MSreplication_options
/);
}
sub _schemas {
my ($self, $db) = @_;
my $owners = $self->dbh->selectcol_arrayref($self->_is_2k ? <<"EOF2K" : <<"EOF");
SELECT name
FROM [$db].dbo.sysusers
WHERE uid <> gid
EOF2K
SELECT name
FROM [$db].sys.schemas
EOF
return grep !/^(?:#|guest|INFORMATION_SCHEMA|sys)/, @$owners;
}
sub _current_schema {
my $self = shift;
if ($self->_is_2k) {
return ($self->dbh->selectrow_array('SELECT user_name()'))[0];
}
return ($self->dbh->selectrow_array('SELECT schema_name()'))[0];
}
sub _current_db {
my $self = shift;
return ($self->dbh->selectrow_array('SELECT db_name()'))[0];
}
sub _switch_db {
my ($self, $db) = @_;
$self->dbh->do("use [$db]");
}
sub _setup {
my $self = shift;
$self->next::method(@_);
my $current_db = $self->_current_db;
if (ref $self->db_schema eq 'HASH') {
if (keys %{ $self->db_schema } < 2) {
my ($db) = keys %{ $self->db_schema };
$db ||= $current_db;
if ($db eq '%') {
my $owners = $self->db_schema->{$db};
my $db_names = $self->dbh->selectcol_arrayref(<<'EOF');
SELECT name
FROM master.dbo.sysdatabases
EOF
my @dbs;
foreach my $db_name (@$db_names) {
push @dbs, $db_name
unless any { $_ eq $db_name } $self->_system_databases;
}
$self->db_schema({});
DB: foreach my $db (@dbs) {
if (not ((ref $owners eq 'ARRAY' && $owners->[0] eq '%') || $owners eq '%')) {
my @owners;
foreach my $owner (@$owners) {
push @owners, $owner
if $self->dbh->selectrow_array(<<"EOF");
SELECT name
FROM [$db].dbo.sysusers
WHERE name = @{[ $self->dbh->quote($owner) ]}
EOF
}
next DB unless @owners;
$self->db_schema->{$db} = \@owners;
}
else {
# for post-processing below
$self->db_schema->{$db} = '%';
}
}
$self->qualify_objects(1);
}
else {
if ($db ne $current_db) {
$self->_switch_db($db);
$self->qualify_objects(1);
}
}
}
else {
$self->qualify_objects(1);
}
}
elsif (ref $self->db_schema eq 'ARRAY' || (not defined $self->db_schema)) {
my $owners = $self->db_schema;
$owners ||= [ $self->_current_schema ];
$self->qualify_objects(1) if @$owners > 1;
$self->db_schema({ $current_db => $owners });
}
foreach my $db (keys %{ $self->db_schema }) {
if ($self->db_schema->{$db} eq '%') {
$self->db_schema->{$db} = [ $self->_schemas($db) ];
$self->qualify_objects(1);
}
}
if (not defined $self->preserve_case) {
foreach my $db (keys %{ $self->db_schema }) {
# We use the sys.databases query for the general case, and fallback to
# databasepropertyex() if for some reason sys.databases is not available,
# 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 $current_db = $self->_current_db;
$self->_switch_db($db);
my $collation_name =
(eval { $self->dbh->selectrow_array("SELECT collation_name FROM [$db].sys.databases WHERE name = @{[ $self->dbh->quote($db) ]}") })[0]
|| (eval { $self->dbh->selectrow_array("SELECT CAST(databasepropertyex(@{[ $self->dbh->quote($db) ]}, 'Collation') AS VARCHAR)") })[0];
$self->_switch_db($current_db);
if (not $collation_name) {
warn <<"EOF";
WARNING: MSSQL Collation detection failed for database '$db'. Defaulting to
case-insensitive mode. Override the 'preserve_case' attribute in your Loader
options if needed.
See 'preserve_case' in
perldoc DBIx::Class::Schema::Loader::Base
EOF
$self->preserve_case(0) unless $self->preserve_case;
}
else {
my $case_sensitive = $collation_name =~ /_(?:CS|BIN2?)(?:_|\z)/;
if ($case_sensitive && (not $self->preserve_case)) {
$self->preserve_case(1);
}
else {
$self->preserve_case(0);
}
}
}
}
}
sub _tables_list {
my ($self) = @_;
my @tables;
while (my ($db, $owners) = each %{ $self->db_schema }) {
foreach my $owner (@$owners) {
my $table_names = $self->dbh->selectcol_arrayref(<<"EOF");
SELECT table_name
FROM [$db].INFORMATION_SCHEMA.TABLES
WHERE table_schema = @{[ $self->dbh->quote($owner) ]}
EOF
TABLE: foreach my $table_name (@$table_names) {
next TABLE if any { $_ eq $table_name } $self->_system_tables;
push @tables, DBIx::Class::Schema::Loader::Table::Sybase->new(
loader => $self,
name => $table_name,
database => $db,
schema => $owner,
);
}
}
}
return $self->_filter_tables(\@tables);
}
sub _table_pk_info {
my ($self, $table) = @_;
my $db = $table->database;
my $pk = $self->dbh->selectcol_arrayref(<<"EOF");
SELECT kcu.column_name
FROM [$db].INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc
JOIN [$db].INFORMATION_SCHEMA.KEY_COLUMN_USAGE kcu
ON kcu.table_name = tc.table_name
AND kcu.table_schema = tc.table_schema
AND kcu.constraint_name = tc.constraint_name
WHERE tc.table_name = @{[ $self->dbh->quote($table->name) ]}
AND tc.table_schema = @{[ $self->dbh->quote($table->schema) ]}
AND tc.constraint_type = 'PRIMARY KEY'
ORDER BY kcu.ordinal_position
EOF
$pk = [ map $self->_lc($_), @$pk ];
return $pk;
}
sub _table_fk_info {
my ($self, $table) = @_;
my $db = $table->database;
my $sth = $self->dbh->prepare(<<"EOF");
SELECT rc.constraint_name, rc.unique_constraint_schema, uk_tc.table_name,
fk_kcu.column_name, uk_kcu.column_name, rc.delete_rule, rc.update_rule
FROM [$db].INFORMATION_SCHEMA.TABLE_CONSTRAINTS fk_tc
JOIN [$db].INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS rc
ON rc.constraint_name = fk_tc.constraint_name
AND rc.constraint_schema = fk_tc.table_schema
JOIN [$db].INFORMATION_SCHEMA.KEY_COLUMN_USAGE fk_kcu
ON fk_kcu.constraint_name = fk_tc.constraint_name
AND fk_kcu.table_name = fk_tc.table_name
AND fk_kcu.table_schema = fk_tc.table_schema
JOIN [$db].INFORMATION_SCHEMA.TABLE_CONSTRAINTS uk_tc
ON uk_tc.constraint_name = rc.unique_constraint_name
AND uk_tc.table_schema = rc.unique_constraint_schema
JOIN [$db].INFORMATION_SCHEMA.KEY_COLUMN_USAGE uk_kcu
ON uk_kcu.constraint_name = rc.unique_constraint_name
AND uk_kcu.ordinal_position = fk_kcu.ordinal_position
AND uk_kcu.table_name = uk_tc.table_name
AND uk_kcu.table_schema = rc.unique_constraint_schema
WHERE fk_tc.table_name = @{[ $self->dbh->quote($table->name) ]}
AND fk_tc.table_schema = @{[ $self->dbh->quote($table->schema) ]}
ORDER BY fk_kcu.ordinal_position
EOF
$sth->execute;
my %rels;
while (my ($fk, $remote_schema, $remote_table, $col, $remote_col,
$delete_rule, $update_rule) = $sth->fetchrow_array) {
push @{ $rels{$fk}{local_columns} }, $self->_lc($col);
push @{ $rels{$fk}{remote_columns} }, $self->_lc($remote_col);
$rels{$fk}{remote_table} = DBIx::Class::Schema::Loader::Table::Sybase->new(
loader => $self,
name => $remote_table,
database => $db,
schema => $remote_schema,
) unless exists $rels{$fk}{remote_table};
$rels{$fk}{attrs} ||= {
on_delete => uc $delete_rule,
on_update => uc $update_rule,
is_deferrable => 1 # constraints can be temporarily disabled, but DEFERRABLE is not supported
};
}
return [ values %rels ];
}
sub _table_uniq_info {
my ($self, $table) = @_;
my $db = $table->database;
my $sth = $self->dbh->prepare(<<"EOF");
SELECT tc.constraint_name, kcu.column_name
FROM [$db].INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc
JOIN [$db].INFORMATION_SCHEMA.KEY_COLUMN_USAGE kcu
ON kcu.constraint_name = tc.constraint_name
AND kcu.table_name = tc.table_name
AND kcu.table_schema = tc.table_schema
wHERE tc.table_name = @{[ $self->dbh->quote($table->name) ]}
AND tc.table_schema = @{[ $self->dbh->quote($table->schema) ]}
AND tc.constraint_type = 'UNIQUE'
ORDER BY kcu.ordinal_position
EOF
$sth->execute;
my %uniq;
while (my ($constr, $col) = $sth->fetchrow_array) {
push @{ $uniq{$constr} }, $self->_lc($col);
}
return [ map [ $_ => $uniq{$_} ], sort keys %uniq ];
}
sub _columns_info_for {
my $self = shift;
my ($table) = @_;
my $db = $table->database;
my $result = $self->next::method(@_);
# get type info (and identity)
my $rows = $self->dbh->selectall_arrayref($self->_is_2k ? <<"EOF2K" : <<"EOF");
SELECT c.column_name, c.character_maximum_length, c.data_type, c.datetime_precision, c.column_default, (sc.status & 0x80) is_identity
FROM [$db].INFORMATION_SCHEMA.COLUMNS c
JOIN [$db].dbo.sysusers ss ON
c.table_schema = ss.name
JOIN [$db].dbo.sysobjects so ON
c.table_name = so.name
AND so.uid = ss.uid
JOIN [$db].dbo.syscolumns sc ON
c.column_name = sc.name
AND sc.id = so.Id
WHERE c.table_schema = @{[ $self->dbh->quote($table->schema) ]}
AND c.table_name = @{[ $self->dbh->quote($table->name) ]}
EOF2K
SELECT c.column_name, c.character_maximum_length, c.data_type, c.datetime_precision, c.column_default, sc.is_identity
FROM [$db].INFORMATION_SCHEMA.COLUMNS c
JOIN [$db].sys.schemas ss ON
c.table_schema = ss.name
JOIN [$db].sys.objects so ON
c.table_name = so.name
AND so.schema_id = ss.schema_id
JOIN [$db].sys.columns sc ON
c.column_name = sc.name
AND sc.object_id = so.object_id
WHERE c.table_schema = @{[ $self->dbh->quote($table->schema) ]}
AND c.table_name = @{[ $self->dbh->quote($table->name) ]}
EOF
foreach my $row (@$rows) {
my ($col, $char_max_length, $data_type, $datetime_precision, $default, $is_identity) = @$row;
$col = lc $col unless $self->preserve_case;
my $info = $result->{$col} || next;
$info->{data_type} = $data_type;
if (defined $char_max_length) {
$info->{size} = $char_max_length;
$info->{size} = 0 if $char_max_length < 0;
}
if ($is_identity) {
$info->{is_auto_increment} = 1;
$info->{data_type} =~ s/\s*identity//i;
delete $info->{size};
}
# fix types
if ($data_type eq 'int') {
$info->{data_type} = 'integer';
}
elsif ($data_type eq 'timestamp') {
$info->{inflate_datetime} = 0;
}
elsif ($data_type =~ /^(?:numeric|decimal)\z/) {
if (ref($info->{size}) && $info->{size}[0] == 18 && $info->{size}[1] == 0) {
delete $info->{size};
}
}
elsif ($data_type eq 'float') {
$info->{data_type} = 'double precision';
delete $info->{size};
}
elsif ($data_type =~ /^(?:small)?datetime\z/) {
# fixup for DBD::Sybase
if ($info->{default_value} && $info->{default_value} eq '3') {
delete $info->{default_value};
}
}
elsif ($data_type =~ /^(?:datetime(?:2|offset)|time)\z/) {
$info->{size} = $datetime_precision;
delete $info->{size} if $info->{size} == 7;
}
elsif ($data_type eq 'varchar' && $info->{size} == 0) {
$info->{data_type} = 'text';
delete $info->{size};
}
elsif ($data_type eq 'nvarchar' && $info->{size} == 0) {
$info->{data_type} = 'ntext';
delete $info->{size};
}
elsif ($data_type eq 'varbinary' && $info->{size} == 0) {
$info->{data_type} = 'image';
delete $info->{size};
}
if ($data_type !~ /^(?:n?char|n?varchar|binary|varbinary|numeric|decimal|float|datetime(?:2|offset)|time)\z/) {
delete $info->{size};
}
if (defined $default) {
# strip parens
$default =~ s/^\( (.*) \)\z/$1/x;
# Literal strings are in ''s, numbers are in ()s (in some versions of
# MSSQL, in others they are unquoted) everything else is a function.
$info->{default_value} =
$default =~ /^['(] (.*) [)']\z/x ? $1 :
$default =~ /^\d/ ? $default : \$default;
if ((eval { lc ${ $info->{default_value} } }||'') eq 'getdate()') {
${ $info->{default_value} } = 'current_timestamp';
my $getdate = 'getdate()';
$info->{original}{default_value} = \$getdate;
}
}
}
return $result;
}
=head1 SEE ALSO
L<DBIx::Class::Schema::Loader::DBI::Sybase::Microsoft_SQL_Server>,
L<DBIx::Class::Schema::Loader::DBI::ODBC::Microsoft_SQL_Server>,
L<DBIx::Class::Schema::Loader>, L<DBIx::Class::Schema::Loader::Base>,
L<DBIx::Class::Schema::Loader::DBI>
=head1 AUTHORS
See L<DBIx::Class::Schema::Loader/AUTHORS>.
=head1 LICENSE
This library is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
1;
# vim:et sts=4 sw=4 tw=0:
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