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Classes

  • NMsSqlDriver
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  1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (http://nette.org)
  5:  *
  6:  * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
  7:  *
  8:  * For the full copyright and license information, please view
  9:  * the file license.txt that was distributed with this source code.
 10:  * @package Nette\Database\Drivers
 11:  */
 12: 
 13: 
 14: 
 15: /**
 16:  * Supplemental MySQL database driver.
 17:  *
 18:  * @author     David Grudl
 19:  * @package Nette\Database\Drivers
 20:  */
 21: class NMySqlDriver extends NObject implements ISupplementalDriver
 22: {
 23:     const ERROR_ACCESS_DENIED = 1045;
 24:     const ERROR_DUPLICATE_ENTRY = 1062;
 25:     const ERROR_DATA_TRUNCATED = 1265;
 26: 
 27:     /** @var NConnection */
 28:     private $connection;
 29: 
 30: 
 31: 
 32:     /**
 33:      * Driver options:
 34:      *   - charset => character encoding to set (default is utf8)
 35:      *   - sqlmode => see http://dev.mysql.com/doc/refman/5.0/en/server-sql-mode.html
 36:      */
 37:     public function __construct(NConnection $connection, array $options)
 38:     {
 39:         $this->connection = $connection;
 40:         $charset = isset($options['charset']) ? $options['charset'] : 'utf8';
 41:         if ($charset) {
 42:             $connection->exec("SET NAMES '$charset'");
 43:         }
 44:         if (isset($options['sqlmode'])) {
 45:             $connection->exec("SET sql_mode='$options[sqlmode]'");
 46:         }
 47:         $connection->exec("SET time_zone='" . date('P') . "'");
 48:     }
 49: 
 50: 
 51: 
 52:     /********************* SQL ****************d*g**/
 53: 
 54: 
 55: 
 56:     /**
 57:      * Delimites identifier for use in a SQL statement.
 58:      */
 59:     public function delimite($name)
 60:     {
 61:         // @see http://dev.mysql.com/doc/refman/5.0/en/identifiers.html
 62:         return '`' . str_replace('`', '``', $name) . '`';
 63:     }
 64: 
 65: 
 66: 
 67:     /**
 68:      * Formats date-time for use in a SQL statement.
 69:      */
 70:     public function formatDateTime(DateTime $value)
 71:     {
 72:         return $value->format("'Y-m-d H:i:s'");
 73:     }
 74: 
 75: 
 76: 
 77:     /**
 78:      * Encodes string for use in a LIKE statement.
 79:      */
 80:     public function formatLike($value, $pos)
 81:     {
 82:         $value = addcslashes(str_replace('\\', '\\\\', $value), "\x00\n\r\\'%_");
 83:         return ($pos <= 0 ? "'%" : "'") . $value . ($pos >= 0 ? "%'" : "'");
 84:     }
 85: 
 86: 
 87: 
 88:     /**
 89:      * Injects LIMIT/OFFSET to the SQL query.
 90:      */
 91:     public function applyLimit(&$sql, $limit, $offset)
 92:     {
 93:         if ($limit >= 0 || $offset > 0) {
 94:             // see http://dev.mysql.com/doc/refman/5.0/en/select.html
 95:             $sql .= ' LIMIT ' . ($limit < 0 ? '18446744073709551615' : (int) $limit)
 96:                 . ($offset > 0 ? ' OFFSET ' . (int) $offset : '');
 97:         }
 98:     }
 99: 
100: 
101: 
102:     /**
103:      * Normalizes result row.
104:      */
105:     public function normalizeRow($row, $statement)
106:     {
107:         return $row;
108:     }
109: 
110: 
111: 
112:     /********************* reflection ****************d*g**/
113: 
114: 
115: 
116:     /**
117:      * Returns list of tables.
118:      */
119:     public function getTables()
120:     {
121:         /*$this->connection->query("
122:             SELECT TABLE_NAME as name, TABLE_TYPE = 'VIEW' as view
123:             FROM INFORMATION_SCHEMA.TABLES
124:             WHERE TABLE_SCHEMA = DATABASE()
125:         ");*/
126:         $tables = array();
127:         foreach ($this->connection->query('SHOW FULL TABLES', PDO::FETCH_NUM) as $row) {
128:             $tables[] = array(
129:                 'name' => $row[0],
130:                 'view' => isset($row[1]) && $row[1] === 'VIEW',
131:             );
132:         }
133:         return $tables;
134:     }
135: 
136: 
137: 
138:     /**
139:      * Returns metadata for all columns in a table.
140:      */
141:     public function getColumns($table)
142:     {
143:         /*$this->connection->query("
144:             SELECT *
145:             FROM INFORMATION_SCHEMA.COLUMNS
146:             WHERE TABLE_NAME = {$this->connection->quote($table)} AND TABLE_SCHEMA = DATABASE()
147:         ");*/
148:         $columns = array();
149:         foreach ($this->connection->query('SHOW FULL COLUMNS FROM ' . $this->delimite($table)) as $row) {
150:             $type = explode('(', $row['Type']);
151:             $columns[] = array(
152:                 'name' => $row['Field'],
153:                 'table' => $table,
154:                 'nativetype' => strtoupper($type[0]),
155:                 'size' => isset($type[1]) ? (int) $type[1] : NULL,
156:                 'unsigned' => (bool) strstr($row['Type'], 'unsigned'),
157:                 'nullable' => $row['Null'] === 'YES',
158:                 'default' => $row['Default'],
159:                 'autoincrement' => $row['Extra'] === 'auto_increment',
160:                 'primary' => $row['Key'] === 'PRI',
161:                 'vendor' => (array) $row,
162:             );
163:         }
164:         return $columns;
165:     }
166: 
167: 
168: 
169:     /**
170:      * Returns metadata for all indexes in a table.
171:      */
172:     public function getIndexes($table)
173:     {
174:         /*$this->connection->query("
175:             SELECT *
176:             FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
177:             WHERE TABLE_NAME = {$this->connection->quote($table)} AND TABLE_SCHEMA = DATABASE()
178:             AND REFERENCED_COLUMN_NAME IS NULL
179:         ");*/
180:         $indexes = array();
181:         foreach ($this->connection->query('SHOW INDEX FROM ' . $this->delimite($table)) as $row) {
182:             $indexes[$row['Key_name']]['name'] = $row['Key_name'];
183:             $indexes[$row['Key_name']]['unique'] = !$row['Non_unique'];
184:             $indexes[$row['Key_name']]['primary'] = $row['Key_name'] === 'PRIMARY';
185:             $indexes[$row['Key_name']]['columns'][$row['Seq_in_index'] - 1] = $row['Column_name'];
186:         }
187:         return array_values($indexes);
188:     }
189: 
190: 
191: 
192:     /**
193:      * Returns metadata for all foreign keys in a table.
194:      */
195:     public function getForeignKeys($table)
196:     {
197:         $keys = array();
198:         $query = 'SELECT CONSTRAINT_NAME, COLUMN_NAME, REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAME FROM information_schema.KEY_COLUMN_USAGE '
199:             . 'WHERE TABLE_SCHEMA = DATABASE() AND REFERENCED_TABLE_NAME IS NOT NULL AND TABLE_NAME = ' . $this->connection->quote($table);
200: 
201:         foreach ($this->connection->query($query) as $id => $row) {
202:             $keys[$id]['name'] = $row['CONSTRAINT_NAME']; // foreign key name
203:             $keys[$id]['local'] = $row['COLUMN_NAME']; // local columns
204:             $keys[$id]['table'] = $row['REFERENCED_TABLE_NAME']; // referenced table
205:             $keys[$id]['foreign'] = $row['REFERENCED_COLUMN_NAME']; // referenced columns
206:         }
207: 
208:         return array_values($keys);
209:     }
210: 
211: 
212: 
213:     /**
214:      * @return bool
215:      */
216:     public function isSupported($item)
217:     {
218:         return $item === self::META;
219:     }
220: 
221: }
222: 
Nette Framework 2.0.3 (for PHP 5.2, prefixed) API API documentation generated by ApiGen 2.7.0