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# mysql.pm - provides mysql-specific overrides of the OpenSLX MetaDB API.
#
# (c) 2006 - OpenSLX.com
#
# Oliver Tappe <ot@openslx.com>
#
package OpenSLX::MetaDB::mysql;
use vars qw(@ISA $VERSION);
@ISA = ('OpenSLX::MetaDB::DBI');
$VERSION = 1.01; # API-version . implementation-version
################################################################################
### This class provides a MetaDB backend for mysql databases.
### - by default the db will be created inside a 'openslxdata-mysql' directory.
################################################################################
use strict;
use Carp;
use OpenSLX::Basics;
use OpenSLX::MetaDB::DBI $VERSION;
my $superVersion = $OpenSLX::MetaDB::DBI::VERSION;
if ($superVersion < $VERSION) {
confess _tr('Unable to load module <%s> (Version <%s> required, but <%s> found)',
'OpenSLX::MetaDB::DBI', $VERSION, $superVersion);
}
################################################################################
### implementation
################################################################################
sub new
{
my $class = shift;
my $self = {};
return bless $self, $class;
}
sub connect
{
my $self = shift;
my $dbSpec = $openslxConfig{'db-spec'};
if (!defined $dbSpec) {
# build $dbSpec from individual parameters:
$dbSpec = "database=$openslxConfig{'db-name'}";
}
my $user = (getpwuid($>))[0];
vlog 1, "trying to connect user <$user> to mysql-database <$dbSpec>";
eval ('require DBD::mysql; 1;')
or die _tr(qq[%s doesn't seem to be installed,
so there is no support for %s available, sorry!\n], 'DBI::mysql', 'mysql');
$self->{'dbh'} = DBI->connect("dbi:mysql:$dbSpec", $user, '',
{PrintError => 0})
or confess _tr("Cannot connect to database <%s> (%s)",
$dbSpec, $DBI::errstr);
}
sub schemaConvertTypeDescrToNative
{
my $self = shift;
my $typeDescr = lc(shift);
if ($typeDescr eq 'b') {
return 'integer';
} elsif ($typeDescr eq 'i') {
return 'integer';
} elsif ($typeDescr eq 'pk') {
return 'integer AUTO_INCREMENT primary key';
} elsif ($typeDescr eq 'fk') {
return 'integer';
} elsif ($typeDescr =~ m[^s\.(\d+)$]i) {
return "varchar($1)";
} else {
confess _tr('UnknownDbSchemaTypeDescr', $typeDescr);
}
}
sub schemaRenameTable
{
my $self = shift;
my $oldTable = shift;
my $newTable = shift;
my $colDescrs = shift;
my $isSubCmd = shift;
my $dbh = $self->{'dbh'};
vlog 1, "renaming table <$oldTable> to <$newTable>..." unless $isSubCmd;
my $sql = "ALTER TABLE $oldTable RENAME TO $newTable";
vlog 3, $sql;
$dbh->do($sql)
or confess _tr(q[Can't rename table <%s> (%s)], $oldTable, $dbh->errstr);
}
sub schemaAddColumns
{
my $self = shift;
my $table = shift;
my $newColDescrs = shift;
my $newColDefaultVals = shift;
my $colDescrs = shift;
my $isSubCmd = shift;
my $dbh = $self->{'dbh'};
my $newColNames = $self->_convertColDescrsToColNamesString($newColDescrs);
vlog 1, "adding columns <$newColNames> to table <$table>" unless $isSubCmd;
my $addClause
= join ', ',
map {
"ADD COLUMN "
.$self->_convertColDescrsToDBNativeString([$_]);
}
@$newColDescrs;
my $sql = "ALTER TABLE $table $addClause";
vlog 3, $sql;
$dbh->do($sql)
or confess _tr(q[Can't add columns to table <%s> (%s)], $table,
$dbh->errstr);
# if default values have been provided, we apply them now:
if (defined $newColDefaultVals) {
$self->_doUpdate($table, undef, $newColDefaultVals);
}
}
sub schemaDropColumns
{
my $self = shift;
my $table = shift;
my $dropColNames = shift;
my $colDescrs = shift;
my $isSubCmd = shift;
my $dbh = $self->{'dbh'};
my $dropColStr = join ', ', @$dropColNames;
vlog 1, "dropping columns <$dropColStr> from table <$table>..."
unless $isSubCmd;
my $dropClause = join ', ', map { "DROP COLUMN $_" } @$dropColNames;
my $sql = "ALTER TABLE $table $dropClause";
vlog 3, $sql;
$dbh->do($sql)
or confess _tr(q[Can't drop columns from table <%s> (%s)], $table,
$dbh->errstr);
}
sub schemaChangeColumns
{
my $self = shift;
my $table = shift;
my $colChanges = shift;
my $colDescrs = shift;
my $isSubCmd = shift;
my $dbh = $self->{'dbh'};
my $changeColStr = join ', ', keys %$colChanges;
vlog 1, "changing columns <$changeColStr> in table <$table>..."
unless $isSubCmd;
my $changeClause
= join ', ',
map {
"CHANGE COLUMN $_ "
.$self->_convertColDescrsToDBNativeString([$colChanges->{$_}]);
}
keys %$colChanges;
my $sql = "ALTER TABLE $table $changeClause";
vlog 3, $sql;
$dbh->do($sql)
or confess _tr(q[Can't change columns in table <%s> (%s)], $table,
$dbh->errstr);
}
1;
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