1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# This Source Code Form is "Incompatible With Secondary Licenses", as
# defined by the Mozilla Public License, v. 2.0.
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 $self;
} #eosub--_initialize
#--------------------------------------------------------------------
sub get_create_database_sql {
my ($self, $name) = @_;
# We only create as utf8 if we have no params (meaning we're doing
# a new installation) or if the utf8 param is on.
my $create_utf8 = Bugzilla->params->{'utf8'}
|| !defined Bugzilla->params->{'utf8'};
my $charset = $create_utf8 ? "ENCODING 'UTF8' TEMPLATE template0" : '';
return ("CREATE DATABASE $name $charset");
}
sub get_rename_column_ddl {
my ($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.
push(@sql, "ALTER SEQUENCE ${table}_${old_name}_seq
RENAME TO ${table}_${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 ();
}
my @sql = ("ALTER TABLE $old_name RENAME TO $new_name");
# If there's a SERIAL column on this table, we also need to rename the
# sequence.
# If there is a PRIMARY KEY, we need to rename it too.
my @columns = $self->get_table_columns($old_name);
foreach my $column (@columns) {
my $def = $self->get_column_abstract($old_name, $column);
if ($def->{TYPE} =~ /SERIAL/i) {
my $old_seq = "${old_name}_${column}_seq";
my $new_seq = "${new_name}_${column}_seq";
push(@sql, "ALTER SEQUENCE $old_seq RENAME TO $new_seq");
push(@sql, "ALTER TABLE $new_name ALTER COLUMN $column
SET DEFAULT NEXTVAL('$new_seq')");
}
if ($def->{PRIMARYKEY}) {
my $old_pk = "${old_name}_pkey";
my $new_pk = "${new_name}_pkey";
push(@sql, "ALTER INDEX $old_pk RENAME to $new_pk");
}
}
return @sql;
}
sub get_set_serial_sql {
my ($self, $table, $column, $value) = @_;
return ("SELECT setval('${table}_${column}_seq', $value, false)
FROM $table");
}
sub _get_alter_type_sql {
my ($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/\bserial\b/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
OWNED BY $table.$column");
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");
push(@statements, "ALTER SEQUENCE ${table}_${column}_seq
OWNED BY NONE");
push(@statements, "DROP SEQUENCE ${table}_${column}_seq");
}
return @statements;
}
1;
|
