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# -*- Mode: perl; indent-tabs-mode: nil -*-
#
# The contents of this file are subject to the Mozilla Public
# License Version 1.1 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
# implied. See the License for the specific language governing
# rights and limitations under the License.
#
# The Original Code is the Bugzilla Bug Tracking System.
#
# The Initial Developer of the Original Code is Netscape Communications
# Corporation. Portions created by Netscape are
# Copyright (C) 1998 Netscape Communications Corporation. All
# Rights Reserved.
#
# Contributor(s): Andrew Dunstan <andrew@dunslane.net>,
# Edward J. Sabol <edwardjsabol@iname.com>
# Max Kanat-Alexander <mkanat@bugzilla.org>
package Bugzilla::DB::Schema::Pg;
###############################################################################
#
# DB::Schema implementation for PostgreSQL
#
###############################################################################
use strict;
use base qw(Bugzilla::DB::Schema);
use Storable qw(dclone);
#------------------------------------------------------------------------------
sub _initialize {
my $self = shift;
$self = $self->SUPER::_initialize(@_);
# Remove FULLTEXT index types from the schemas.
foreach my $table (keys %{ $self->{schema} }) {
if ($self->{schema}{$table}{INDEXES}) {
foreach my $index (@{ $self->{schema}{$table}{INDEXES} }) {
if (ref($index) eq 'HASH') {
delete($index->{TYPE}) if (exists $index->{TYPE}
&& $index->{TYPE} eq 'FULLTEXT');
}
}
foreach my $index (@{ $self->{abstract_schema}{$table}{INDEXES} }) {
if (ref($index) eq 'HASH') {
delete($index->{TYPE}) if (exists $index->{TYPE}
&& $index->{TYPE} eq 'FULLTEXT');
}
}
}
}
$self->{db_specific} = {
BOOLEAN => 'smallint',
FALSE => '0',
TRUE => '1',
INT1 => 'integer',
INT2 => 'integer',
INT3 => 'integer',
INT4 => 'integer',
SMALLSERIAL => 'serial unique',
MEDIUMSERIAL => 'serial unique',
INTSERIAL => 'serial unique',
TINYTEXT => 'varchar(255)',
MEDIUMTEXT => 'text',
LONGTEXT => 'text',
LONGBLOB => 'bytea',
DATETIME => 'timestamp(0) without time zone',
};
$self->_adjust_schema;
return $self;
} #eosub--_initialize
#--------------------------------------------------------------------
sub get_rename_column_ddl {
my ($self, $table, $old_name, $new_name) = @_;
if (lc($old_name) eq lc($new_name)) {
# if the only change is a case change, return an empty list, since Pg
# is case-insensitive and will return an error about a duplicate name
return ();
}
my @sql = ("ALTER TABLE $table RENAME COLUMN $old_name TO $new_name");
my $def = $self->get_column_abstract($table, $old_name);
if ($def->{TYPE} =~ /SERIAL/i) {
# We have to rename the series also, and fix the default of the series.
push(@sql, "ALTER TABLE ${table}_${old_name}_seq
RENAME TO ${table}_${new_name}_seq");
push(@sql, "ALTER TABLE $table ALTER COLUMN $new_name
SET DEFAULT NEXTVAL('${table}_${new_name}_seq')");
}
return @sql;
}
sub get_rename_table_sql {
my ($self, $old_name, $new_name) = @_;
if (lc($old_name) eq lc($new_name)) {
# if the only change is a case change, return an empty list, since Pg
# is case-insensitive and will return an error about a duplicate name
return ();
}
return ("ALTER TABLE $old_name RENAME TO $new_name");
}
sub _get_alter_type_sql {
my ($self, $table, $column, $new_def, $old_def) = @_;
my @statements;
my $type = $new_def->{TYPE};
$type = $self->{db_specific}->{$type}
if exists $self->{db_specific}->{$type};
if ($type =~ /serial/i && $old_def->{TYPE} !~ /serial/i) {
die("You cannot specify a DEFAULT on a SERIAL-type column.")
if $new_def->{DEFAULT};
$type =~ s/serial/integer/i;
}
# On Pg, you don't need UNIQUE if you're a PK--it creates
# two identical indexes otherwise.
$type =~ s/unique//i if $new_def->{PRIMARYKEY};
push(@statements, "ALTER TABLE $table ALTER COLUMN $column
TYPE $type");
if ($new_def->{TYPE} =~ /serial/i && $old_def->{TYPE} !~ /serial/i) {
push(@statements, "CREATE SEQUENCE ${table}_${column}_seq");
push(@statements, "SELECT setval('${table}_${column}_seq',
MAX($table.$column))
FROM $table");
push(@statements, "ALTER TABLE $table ALTER COLUMN $column
SET DEFAULT nextval('${table}_${column}_seq')");
}
# If this column is no longer SERIAL, we need to drop the sequence
# that went along with it.
if ($old_def->{TYPE} =~ /serial/i && $new_def->{TYPE} !~ /serial/i) {
push(@statements, "ALTER TABLE $table ALTER COLUMN $column
DROP DEFAULT");
# XXX Pg actually won't let us drop the sequence, even though it's
# no longer in use. So we harmlessly leave behind a sequence
# that does nothing.
#push(@statements, "DROP SEQUENCE ${table}_${column}_seq");
}
return @statements;
}
1;
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