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
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
|
<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
namespace phpbb\db\extractor;
use phpbb\db\extractor\exception\extractor_not_initialized_exception;
class postgres_extractor extends base_extractor
{
/**
* {@inheritdoc}
*/
public function write_start($table_prefix)
{
if (!$this->is_initialized)
{
throw new extractor_not_initialized_exception();
}
$sql_data = "--\n";
$sql_data .= "-- phpBB Backup Script\n";
$sql_data .= "-- Dump of tables for $table_prefix\n";
$sql_data .= "-- DATE : " . gmdate("d-m-Y H:i:s", $this->time) . " GMT\n";
$sql_data .= "--\n";
$sql_data .= "BEGIN TRANSACTION;\n";
$this->flush($sql_data);
}
/**
* {@inheritdoc}
*/
public function write_table($table_name)
{
static $domains_created = array();
if (!$this->is_initialized)
{
throw new extractor_not_initialized_exception();
}
$sql = "SELECT a.domain_name, a.data_type, a.character_maximum_length, a.domain_default
FROM INFORMATION_SCHEMA.domains a, INFORMATION_SCHEMA.column_domain_usage b
WHERE a.domain_name = b.domain_name
AND b.table_name = '{$table_name}'";
$result = $this->db->sql_query($sql);
while ($row = $this->db->sql_fetchrow($result))
{
if (empty($domains_created[$row['domain_name']]))
{
$domains_created[$row['domain_name']] = true;
//$sql_data = "DROP DOMAIN {$row['domain_name']};\n";
$sql_data = "CREATE DOMAIN {$row['domain_name']} as {$row['data_type']}";
if (!empty($row['character_maximum_length']))
{
$sql_data .= '(' . $row['character_maximum_length'] . ')';
}
$sql_data .= ' NOT NULL';
if (!empty($row['domain_default']))
{
$sql_data .= ' DEFAULT ' . $row['domain_default'];
}
$this->flush($sql_data . ";\n");
}
}
$this->db->sql_freeresult($result);
$sql_data = '-- Table: ' . $table_name . "\n";
$sql_data .= "DROP TABLE $table_name;\n";
// PGSQL does not "tightly" bind sequences and tables, we must guess...
$sql = "SELECT relname
FROM pg_class
WHERE relkind = 'S'
AND relname = '{$table_name}_seq'";
$result = $this->db->sql_query($sql);
// We don't even care about storing the results. We already know the answer if we get rows back.
if ($this->db->sql_fetchrow($result))
{
$sql_data .= "DROP SEQUENCE IF EXISTS {$table_name}_seq;\n";
$sql_data .= "CREATE SEQUENCE {$table_name}_seq;\n";
}
$this->db->sql_freeresult($result);
$field_query = "SELECT a.attnum, a.attname as field, t.typname as type, a.attlen as length, a.atttypmod as lengthvar, a.attnotnull as notnull
FROM pg_class c, pg_attribute a, pg_type t
WHERE c.relname = '" . $this->db->sql_escape($table_name) . "'
AND a.attnum > 0
AND a.attrelid = c.oid
AND a.atttypid = t.oid
ORDER BY a.attnum";
$result = $this->db->sql_query($field_query);
$sql_data .= "CREATE TABLE $table_name(\n";
$lines = array();
while ($row = $this->db->sql_fetchrow($result))
{
// Get the data from the table
$sql_get_default = "SELECT pg_get_expr(d.adbin, d.adrelid) as rowdefault
FROM pg_attrdef d, pg_class c
WHERE (c.relname = '" . $this->db->sql_escape($table_name) . "')
AND (c.oid = d.adrelid)
AND d.adnum = " . $row['attnum'];
$def_res = $this->db->sql_query($sql_get_default);
$def_row = $this->db->sql_fetchrow($def_res);
$this->db->sql_freeresult($def_res);
if (empty($def_row))
{
unset($row['rowdefault']);
}
else
{
$row['rowdefault'] = $def_row['rowdefault'];
}
if ($row['type'] == 'bpchar')
{
// Internally stored as bpchar, but isn't accepted in a CREATE TABLE statement.
$row['type'] = 'char';
}
$line = ' ' . $row['field'] . ' ' . $row['type'];
if (strpos($row['type'], 'char') !== false)
{
if ($row['lengthvar'] > 0)
{
$line .= '(' . ($row['lengthvar'] - 4) . ')';
}
}
if (strpos($row['type'], 'numeric') !== false)
{
$line .= '(';
$line .= sprintf("%s,%s", (($row['lengthvar'] >> 16) & 0xffff), (($row['lengthvar'] - 4) & 0xffff));
$line .= ')';
}
if (isset($row['rowdefault']))
{
$line .= ' DEFAULT ' . $row['rowdefault'];
}
if ($row['notnull'] == 't')
{
$line .= ' NOT NULL';
}
$lines[] = $line;
}
$this->db->sql_freeresult($result);
// Get the listing of primary keys.
$sql_pri_keys = "SELECT ic.relname as index_name, bc.relname as tab_name, ta.attname as column_name, i.indisunique as unique_key, i.indisprimary as primary_key
FROM pg_class bc, pg_class ic, pg_index i, pg_attribute ta, pg_attribute ia
WHERE (bc.oid = i.indrelid)
AND (ic.oid = i.indexrelid)
AND (ia.attrelid = i.indexrelid)
AND (ta.attrelid = bc.oid)
AND (bc.relname = '" . $this->db->sql_escape($table_name) . "')
AND (ta.attrelid = i.indrelid)
AND (ta.attnum = i.indkey[ia.attnum-1])
ORDER BY index_name, tab_name, column_name";
$result = $this->db->sql_query($sql_pri_keys);
$index_create = $index_rows = $primary_key = array();
// We do this in two steps. It makes placing the comma easier
while ($row = $this->db->sql_fetchrow($result))
{
if ($row['primary_key'] == 't')
{
$primary_key[] = $row['column_name'];
$primary_key_name = $row['index_name'];
}
else
{
// We have to store this all this info because it is possible to have a multi-column key...
// we can loop through it again and build the statement
$index_rows[$row['index_name']]['table'] = $table_name;
$index_rows[$row['index_name']]['unique'] = ($row['unique_key'] == 't') ? true : false;
$index_rows[$row['index_name']]['column_names'][] = $row['column_name'];
}
}
$this->db->sql_freeresult($result);
if (!empty($index_rows))
{
foreach ($index_rows as $idx_name => $props)
{
$index_create[] = 'CREATE ' . ($props['unique'] ? 'UNIQUE ' : '') . "INDEX $idx_name ON $table_name (" . implode(', ', $props['column_names']) . ");";
}
}
if (!empty($primary_key))
{
$lines[] = " CONSTRAINT $primary_key_name PRIMARY KEY (" . implode(', ', $primary_key) . ")";
}
// Generate constraint clauses for CHECK constraints
$sql_checks = "SELECT conname as index_name, consrc
FROM pg_constraint, pg_class bc
WHERE conrelid = bc.oid
AND bc.relname = '" . $this->db->sql_escape($table_name) . "'
AND NOT EXISTS (
SELECT *
FROM pg_constraint as c, pg_inherits as i
WHERE i.inhrelid = pg_constraint.conrelid
AND c.conname = pg_constraint.conname
AND c.consrc = pg_constraint.consrc
AND c.conrelid = i.inhparent
)";
$result = $this->db->sql_query($sql_checks);
// Add the constraints to the sql file.
while ($row = $this->db->sql_fetchrow($result))
{
if (!is_null($row['consrc']))
{
$lines[] = ' CONSTRAINT ' . $row['index_name'] . ' CHECK ' . $row['consrc'];
}
}
$this->db->sql_freeresult($result);
$sql_data .= implode(", \n", $lines);
$sql_data .= "\n);\n";
if (!empty($index_create))
{
$sql_data .= implode("\n", $index_create) . "\n\n";
}
$this->flush($sql_data);
}
/**
* {@inheritdoc}
*/
public function write_data($table_name)
{
if (!$this->is_initialized)
{
throw new extractor_not_initialized_exception();
}
// Grab all of the data from current table.
$sql = "SELECT *
FROM $table_name";
$result = $this->db->sql_query($sql);
$i_num_fields = pg_num_fields($result);
$seq = '';
for ($i = 0; $i < $i_num_fields; $i++)
{
$ary_type[] = pg_field_type($result, $i);
$ary_name[] = pg_field_name($result, $i);
$sql = "SELECT pg_get_expr(d.adbin, d.adrelid) as rowdefault
FROM pg_attrdef d, pg_class c
WHERE (c.relname = '{$table_name}')
AND (c.oid = d.adrelid)
AND d.adnum = " . strval($i + 1);
$result2 = $this->db->sql_query($sql);
if ($row = $this->db->sql_fetchrow($result2))
{
// Determine if we must reset the sequences
if (strpos($row['rowdefault'], "nextval('") === 0)
{
$seq .= "SELECT SETVAL('{$table_name}_seq',(select case when max({$ary_name[$i]})>0 then max({$ary_name[$i]})+1 else 1 end FROM {$table_name}));\n";
}
}
}
$this->flush("COPY $table_name (" . implode(', ', $ary_name) . ') FROM stdin;' . "\n");
while ($row = $this->db->sql_fetchrow($result))
{
$schema_vals = array();
// Build the SQL statement to recreate the data.
for ($i = 0; $i < $i_num_fields; $i++)
{
$str_val = $row[$ary_name[$i]];
if (preg_match('#char|text|bool|bytea#i', $ary_type[$i]))
{
$str_val = str_replace(array("\n", "\t", "\r", "\b", "\f", "\v"), array('\n', '\t', '\r', '\b', '\f', '\v'), addslashes($str_val));
$str_empty = '';
}
else
{
$str_empty = '\N';
}
if (empty($str_val) && $str_val !== '0')
{
$str_val = $str_empty;
}
$schema_vals[] = $str_val;
}
// Take the ordered fields and their associated data and build it
// into a valid sql statement to recreate that field in the data.
$this->flush(implode("\t", $schema_vals) . "\n");
}
$this->db->sql_freeresult($result);
$this->flush("\\.\n");
// Write out the sequence statements
$this->flush($seq);
}
/**
* Writes closing line(s) to database backup
*
* @return null
* @throws \phpbb\db\extractor\exception\extractor_not_initialized_exception when calling this function before init_extractor()
*/
public function write_end()
{
if (!$this->is_initialized)
{
throw new extractor_not_initialized_exception();
}
$this->flush("COMMIT;\n");
parent::write_end();
}
}
|
