ILIAS  eassessment Revision 61809
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mysql.php
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1 <?php
2 // +----------------------------------------------------------------------+
3 // | PHP versions 4 and 5 |
4 // +----------------------------------------------------------------------+
5 // | Copyright (c) 1998-2007 Manuel Lemos, Tomas V.V.Cox, |
6 // | Stig. S. Bakken, Lukas Smith |
7 // | All rights reserved. |
8 // +----------------------------------------------------------------------+
9 // | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
10 // | API as well as database abstraction for PHP applications. |
11 // | This LICENSE is in the BSD license style. |
12 // | |
13 // | Redistribution and use in source and binary forms, with or without |
14 // | modification, are permitted provided that the following conditions |
15 // | are met: |
16 // | |
17 // | Redistributions of source code must retain the above copyright |
18 // | notice, this list of conditions and the following disclaimer. |
19 // | |
20 // | Redistributions in binary form must reproduce the above copyright |
21 // | notice, this list of conditions and the following disclaimer in the |
22 // | documentation and/or other materials provided with the distribution. |
23 // | |
24 // | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
25 // | Lukas Smith nor the names of his contributors may be used to endorse |
26 // | or promote products derived from this software without specific prior|
27 // | written permission. |
28 // | |
29 // | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
30 // | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
31 // | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
32 // | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
33 // | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
34 // | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
35 // | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
36 // | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
37 // | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
38 // | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
39 // | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
40 // | POSSIBILITY OF SUCH DAMAGE. |
41 // +----------------------------------------------------------------------+
42 // | Author: Lukas Smith <smith@pooteeweet.org> |
43 // +----------------------------------------------------------------------+
44 //
45 // $Id: mysql.php,v 1.68 2007/03/29 18:18:06 quipo Exp $
46 //
47 
48 require_once 'MDB2/Driver/Reverse/Common.php';
49 
58 class MDB2_Driver_Reverse_mysql extends MDB2_Driver_Reverse_Common
59 {
60  // {{{ getTableFieldDefinition()
61 
70  function getTableFieldDefinition($table, $field_name)
71  {
72  $db =& $this->getDBInstance();
73  if (PEAR::isError($db)) {
74  return $db;
75  }
76 
77  $result = $db->loadModule('Datatype', null, true);
78  if (PEAR::isError($result)) {
79  return $result;
80  }
81  $table = $db->quoteIdentifier($table, true);
82  $query = "SHOW COLUMNS FROM $table LIKE ".$db->quote($field_name);
83  $columns = $db->queryAll($query, null, MDB2_FETCHMODE_ASSOC);
84  if (PEAR::isError($columns)) {
85  return $columns;
86  }
87  foreach ($columns as $column) {
88  $column = array_change_key_case($column, CASE_LOWER);
89  $column['name'] = $column['field'];
90  unset($column['field']);
91  if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
92  if ($db->options['field_case'] == CASE_LOWER) {
93  $column['name'] = strtolower($column['name']);
94  } else {
95  $column['name'] = strtoupper($column['name']);
96  }
97  } else {
98  $column = array_change_key_case($column, $db->options['field_case']);
99  }
100  if ($field_name == $column['name']) {
101  $mapped_datatype = $db->datatype->mapNativeDatatype($column);
102  if (PEAR::IsError($mapped_datatype)) {
103  return $mapped_datatype;
104  }
105  list($types, $length, $unsigned, $fixed) = $mapped_datatype;
106  $notnull = false;
107  if (empty($column['null']) || $column['null'] !== 'YES') {
108  $notnull = true;
109  }
110  $default = false;
111  if (array_key_exists('default', $column)) {
112  $default = $column['default'];
113  if (is_null($default) && $notnull) {
114  $default = '';
115  }
116  }
117  $autoincrement = false;
118  if (!empty($column['extra']) && $column['extra'] == 'auto_increment') {
119  $autoincrement = true;
120  }
121 
122  $definition[0] = array(
123  'notnull' => $notnull,
124  'nativetype' => preg_replace('/^([a-z]+)[^a-z].*/i', '\\1', $column['type'])
125  );
126  if (!is_null($length)) {
127  $definition[0]['length'] = $length;
128  }
129  if (!is_null($unsigned)) {
130  $definition[0]['unsigned'] = $unsigned;
131  }
132  if (!is_null($fixed)) {
133  $definition[0]['fixed'] = $fixed;
134  }
135  if ($default !== false) {
136  $definition[0]['default'] = $default;
137  }
138  if ($autoincrement !== false) {
139  $definition[0]['autoincrement'] = $autoincrement;
140  }
141  foreach ($types as $key => $type) {
142  $definition[$key] = $definition[0];
143  if ($type == 'clob' || $type == 'blob') {
144  unset($definition[$key]['default']);
145  }
146  $definition[$key]['type'] = $type;
147  $definition[$key]['mdb2type'] = $type;
148  }
149  return $definition;
150  }
151  }
152 
153  return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
154  'it was not specified an existing table column', __FUNCTION__);
155  }
156 
157  // }}}
158  // {{{ getTableIndexDefinition()
159 
168  function getTableIndexDefinition($table, $constraint_name)
169  {
170  $db =& $this->getDBInstance();
171  if (PEAR::isError($db)) {
172  return $db;
173  }
174 
175  $table = $db->quoteIdentifier($table, true);
176  $query = "SHOW INDEX FROM $table /*!50002 WHERE Key_name = %s */";
177  $constraint_name_mdb2 = $db->getIndexName($constraint_name);
178  $result = $db->queryRow(sprintf($query, $db->quote($constraint_name_mdb2)));
179  if (!PEAR::isError($result) && !is_null($result)) {
180  // apply 'idxname_format' only if the query succeeded, otherwise
181  // fallback to the given $index_name, without transformation
182  $constraint_name = $constraint_name_mdb2;
183  }
184  $result = $db->query(sprintf($query, $db->quote($constraint_name)));
185  if (PEAR::isError($result)) {
186  return $result;
187  }
188  $colpos = 1;
189  $definition = array();
190  while (is_array($row = $result->fetchRow(MDB2_FETCHMODE_ASSOC))) {
191  $row = array_change_key_case($row, CASE_LOWER);
192  $key_name = $row['key_name'];
193  if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
194  if ($db->options['field_case'] == CASE_LOWER) {
195  $key_name = strtolower($key_name);
196  } else {
197  $key_name = strtoupper($key_name);
198  }
199  }
200  if ($constraint_name == $key_name) {
201  if (!$row['non_unique']) {
202  return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
203  $constraint_name . ' is not an existing table constraint', __FUNCTION__);
204  }
205  $column_name = $row['column_name'];
206  if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
207  if ($db->options['field_case'] == CASE_LOWER) {
208  $column_name = strtolower($column_name);
209  } else {
210  $column_name = strtoupper($column_name);
211  }
212  }
213  $definition['fields'][$column_name] = array(
214  'position' => $colpos++
215  );
216  if (!empty($row['collation'])) {
217  $definition['fields'][$column_name]['sorting'] = ($row['collation'] == 'A'
218  ? 'ascending' : 'descending');
219  }
220  }
221  }
222  $result->free();
223  if (empty($definition['fields'])) {
224  return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
225  $constraint_name . ' is not an existing table constraint', __FUNCTION__);
226  }
227  return $definition;
228  }
229 
230  // }}}
231  // {{{ getTableConstraintDefinition()
232 
241  function getTableConstraintDefinition($table, $index_name)
242  {
243  $db =& $this->getDBInstance();
244  if (PEAR::isError($db)) {
245  return $db;
246  }
247 
248  $table = $db->quoteIdentifier($table, true);
249  $query = "SHOW INDEX FROM $table /*!50002 WHERE Key_name = %s */";
250  if (strtolower($index_name) != 'primary') {
251  $index_name_mdb2 = $db->getIndexName($index_name);
252  $result = $db->queryRow(sprintf($query, $db->quote($index_name_mdb2)));
253  if (!PEAR::isError($result) && !is_null($result)) {
254  // apply 'idxname_format' only if the query succeeded, otherwise
255  // fallback to the given $index_name, without transformation
256  $index_name = $index_name_mdb2;
257  }
258  }
259  $result = $db->query(sprintf($query, $db->quote($index_name)));
260  if (PEAR::isError($result)) {
261  return $result;
262  }
263  $colpos = 1;
264  $definition = array();
265  while (is_array($row = $result->fetchRow(MDB2_FETCHMODE_ASSOC))) {
266  $row = array_change_key_case($row, CASE_LOWER);
267  $key_name = $row['key_name'];
268  if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
269  if ($db->options['field_case'] == CASE_LOWER) {
270  $key_name = strtolower($key_name);
271  } else {
272  $key_name = strtoupper($key_name);
273  }
274  }
275  if ($index_name == $key_name) {
276  if ($row['non_unique']) {
277  return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
278  'it was not specified an existing table constraint', __FUNCTION__);
279  }
280  if ($row['key_name'] == 'PRIMARY') {
281  $definition['primary'] = true;
282  } else {
283  $definition['unique'] = true;
284  }
285  $column_name = $row['column_name'];
286  if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
287  if ($db->options['field_case'] == CASE_LOWER) {
288  $column_name = strtolower($column_name);
289  } else {
290  $column_name = strtoupper($column_name);
291  }
292  }
293  $definition['fields'][$column_name] = array(
294  'position' => $colpos++
295  );
296  if (!empty($row['collation'])) {
297  $definition['fields'][$column_name]['sorting'] = ($row['collation'] == 'A'
298  ? 'ascending' : 'descending');
299  }
300  }
301  }
302  $result->free();
303  if (empty($definition['fields'])) {
304  return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
305  'it was not specified an existing table constraint', __FUNCTION__);
306  }
307  return $definition;
308  }
309 
310  // }}}
311  // {{{ getTriggerDefinition()
312 
325  function getTriggerDefinition($trigger)
326  {
327  $db =& $this->getDBInstance();
328  if (PEAR::isError($db)) {
329  return $db;
330  }
331 
332  $query = 'SELECT trigger_name,
333  event_object_table AS table_name,
334  action_statement AS trigger_body,
335  action_timing AS trigger_type,
336  event_manipulation AS trigger_event
337  FROM information_schema.triggers
338  WHERE trigger_name = '. $db->quote($trigger, 'text');
339  $types = array(
340  'trigger_name' => 'text',
341  'table_name' => 'text',
342  'trigger_body' => 'text',
343  'trigger_type' => 'text',
344  'trigger_event' => 'text',
345  );
346  $def = $db->queryRow($query, $types, MDB2_FETCHMODE_ASSOC);
347  if (PEAR::isError($def)) {
348  return $def;
349  }
350  $def['trigger_comment'] = '';
351  $def['trigger_enabled'] = true;
352  return $def;
353  }
354 
355  // }}}
356  // {{{ tableInfo()
357 
373  function tableInfo($result, $mode = null)
374  {
375  if (is_string($result)) {
376  return parent::tableInfo($result, $mode);
377  }
378 
379  $db =& $this->getDBInstance();
380  if (PEAR::isError($db)) {
381  return $db;
382  }
383 
384  $resource = MDB2::isResultCommon($result) ? $result->getResource() : $result;
385  if (!is_resource($resource)) {
386  return $db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
387  'Could not generate result resource', __FUNCTION__);
388  }
389 
390  if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
391  if ($db->options['field_case'] == CASE_LOWER) {
392  $case_func = 'strtolower';
393  } else {
394  $case_func = 'strtoupper';
395  }
396  } else {
397  $case_func = 'strval';
398  }
399 
400  $count = @mysql_num_fields($resource);
401  $res = array();
402 
403  if ($mode) {
404  $res['num_fields'] = $count;
405  }
406 
407  $db->loadModule('Datatype', null, true);
408  for ($i = 0; $i < $count; $i++) {
409  $res[$i] = array(
410  'table' => $case_func(@mysql_field_table($resource, $i)),
411  'name' => $case_func(@mysql_field_name($resource, $i)),
412  'type' => @mysql_field_type($resource, $i),
413  'length' => @mysql_field_len($resource, $i),
414  'flags' => @mysql_field_flags($resource, $i),
415  );
416  if ($res[$i]['type'] == 'string') {
417  $res[$i]['type'] = 'char';
418  } elseif ($res[$i]['type'] == 'unknown') {
419  $res[$i]['type'] = 'decimal';
420  }
421  $mdb2type_info = $db->datatype->mapNativeDatatype($res[$i]);
422  if (PEAR::isError($mdb2type_info)) {
423  return $mdb2type_info;
424  }
425  $res[$i]['mdb2type'] = $mdb2type_info[0][0];
426  if ($mode & MDB2_TABLEINFO_ORDER) {
427  $res['order'][$res[$i]['name']] = $i;
428  }
429  if ($mode & MDB2_TABLEINFO_ORDERTABLE) {
430  $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
431  }
432  }
433 
434  return $res;
435  }
436 }
437 ?>