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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:  */
 11: 
 12: namespace Nette\Database\Drivers;
 13: 
 14: use Nette;
 15: 
 16: 
 17: /**
 18:  * Supplemental PostgreSQL database driver.
 19:  *
 20:  * @author     David Grudl
 21:  */
 22: class PgSqlDriver extends Nette\Object implements Nette\Database\ISupplementalDriver
 23: {
 24:     /** @var Nette\Database\Connection */
 25:     private $connection;
 26: 
 27: 
 28:     public function __construct(Nette\Database\Connection $connection, array $options)
 29:     {
 30:         $this->connection = $connection;
 31:     }
 32: 
 33: 
 34:     /********************* SQL ****************d*g**/
 35: 
 36: 
 37:     /**
 38:      * Delimites identifier for use in a SQL statement.
 39:      */
 40:     public function delimite($name)
 41:     {
 42:         // @see http://www.postgresql.org/docs/8.2/static/sql-syntax-lexical.html#SQL-SYNTAX-IDENTIFIERS
 43:         return '"' . str_replace('"', '""', $name) . '"';
 44:     }
 45: 
 46: 
 47:     /**
 48:      * Formats boolean for use in a SQL statement.
 49:      */
 50:     public function formatBool($value)
 51:     {
 52:         return $value ? 'TRUE' : 'FALSE';
 53:     }
 54: 
 55: 
 56:     /**
 57:      * Formats date-time for use in a SQL statement.
 58:      */
 59:     public function formatDateTime(\DateTime $value)
 60:     {
 61:         return $value->format("'Y-m-d H:i:s'");
 62:     }
 63: 
 64: 
 65:     /**
 66:      * Encodes string for use in a LIKE statement.
 67:      */
 68:     public function formatLike($value, $pos)
 69:     {
 70:         $value = strtr($value, array("'" => "''", '\\' => '\\\\', '%' => '\\\\%', '_' => '\\\\_'));
 71:         return ($pos <= 0 ? "'%" : "'") . $value . ($pos >= 0 ? "%'" : "'");
 72:     }
 73: 
 74: 
 75:     /**
 76:      * Injects LIMIT/OFFSET to the SQL query.
 77:      */
 78:     public function applyLimit(& $sql, $limit, $offset)
 79:     {
 80:         if ($limit >= 0) {
 81:             $sql .= ' LIMIT ' . (int) $limit;
 82:         }
 83:         if ($offset > 0) {
 84:             $sql .= ' OFFSET ' . (int) $offset;
 85:         }
 86:     }
 87: 
 88: 
 89:     /**
 90:      * Normalizes result row.
 91:      */
 92:     public function normalizeRow($row, $statement)
 93:     {
 94:         return $row;
 95:     }
 96: 
 97: 
 98:     /********************* reflection ****************d*g**/
 99: 
100: 
101:     /**
102:      * Returns list of tables.
103:      */
104:     public function getTables()
105:     {
106:         $tables = array();
107:         foreach ($this->connection->query("
108:             SELECT
109:                 c.relname::varchar AS name,
110:                 c.relkind = 'v' AS view
111:             FROM
112:                 pg_catalog.pg_class AS c
113:                 JOIN pg_catalog.pg_namespace AS n ON n.oid = c.relnamespace
114:             WHERE
115:                 c.relkind IN ('r', 'v')
116:                 AND n.nspname = current_schema()
117:             ORDER BY
118:                 c.relname
119:         ") as $row) {
120:             $tables[] = (array) $row;
121:         }
122: 
123:         return $tables;
124:     }
125: 
126: 
127:     /**
128:      * Returns metadata for all columns in a table.
129:      */
130:     public function getColumns($table)
131:     {
132:         $columns = array();
133:         foreach ($this->connection->query("
134:             SELECT
135:                 a.attname::varchar AS name,
136:                 c.relname::varchar AS table,
137:                 upper(t.typname) AS nativetype,
138:                 NULL AS size,
139:                 FALSE AS unsigned,
140:                 NOT (a.attnotnull OR t.typtype = 'd' AND t.typnotnull) AS nullable,
141:                 ad.adsrc::varchar AS default,
142:                 coalesce(co.contype = 'p' AND strpos(ad.adsrc, 'nextval') = 1, FALSE) AS autoincrement,
143:                 coalesce(co.contype = 'p', FALSE) AS primary,
144:                 substring(ad.adsrc from 'nextval[(]''\"?([^''\"]+)') AS sequence
145:             FROM
146:                 pg_catalog.pg_attribute AS a
147:                 JOIN pg_catalog.pg_class AS c ON a.attrelid = c.oid
148:                 JOIN pg_catalog.pg_namespace AS n ON n.oid = c.relnamespace
149:                 JOIN pg_catalog.pg_type AS t ON a.atttypid = t.oid
150:                 LEFT JOIN pg_catalog.pg_attrdef AS ad ON ad.adrelid = c.oid AND ad.adnum = a.attnum
151:                 LEFT JOIN pg_catalog.pg_constraint AS co ON co.connamespace = n.oid AND contype = 'p' AND co.conrelid = c.oid AND a.attnum = ANY(co.conkey)
152:             WHERE
153:                 c.relkind IN ('r', 'v')
154:                 AND c.relname::varchar = {$this->connection->quote($table)}
155:                 AND n.nspname = current_schema()
156:                 AND a.attnum > 0
157:                 AND NOT a.attisdropped
158:             ORDER BY
159:                 a.attnum
160:         ") as $row) {
161:             $column = (array) $row;
162:             $column['vendor'] = $column;
163:             unset($column['sequence']);
164: 
165:             $columns[] = $column;
166:         }
167: 
168:         return $columns;
169:     }
170: 
171: 
172:     /**
173:      * Returns metadata for all indexes in a table.
174:      */
175:     public function getIndexes($table)
176:     {
177:         $indexes = array();
178:         foreach ($this->connection->query("
179:             SELECT
180:                 c2.relname::varchar AS name,
181:                 i.indisunique AS unique,
182:                 i.indisprimary AS primary,
183:                 a.attname::varchar AS column
184:             FROM
185:                 pg_catalog.pg_class AS c1
186:                 JOIN pg_catalog.pg_namespace AS n ON c1.relnamespace = n.oid
187:                 JOIN pg_catalog.pg_index AS i ON c1.oid = i.indrelid
188:                 JOIN pg_catalog.pg_class AS c2 ON i.indexrelid = c2.oid
189:                 LEFT JOIN pg_catalog.pg_attribute AS a ON c1.oid = a.attrelid AND a.attnum = ANY(i.indkey)
190:             WHERE
191:                 n.nspname = current_schema()
192:                 AND c1.relkind = 'r'
193:                 AND c1.relname = {$this->connection->quote($table)}
194:         ") as $row) {
195:             $indexes[$row['name']]['name'] = $row['name'];
196:             $indexes[$row['name']]['unique'] = $row['unique'];
197:             $indexes[$row['name']]['primary'] = $row['primary'];
198:             $indexes[$row['name']]['columns'][] = $row['column'];
199:         }
200: 
201:         return array_values($indexes);
202:     }
203: 
204: 
205:     /**
206:      * Returns metadata for all foreign keys in a table.
207:      */
208:     public function getForeignKeys($table)
209:     {
210:         /* Does't work with multicolumn foreign keys */
211:         return $this->connection->query("
212:             SELECT
213:                 co.conname::varchar AS name,
214:                 al.attname::varchar AS local,
215:                 cf.relname::varchar AS table,
216:                 af.attname::varchar AS foreign
217:             FROM
218:                 pg_catalog.pg_constraint AS co
219:                 JOIN pg_catalog.pg_namespace AS n ON co.connamespace = n.oid
220:                 JOIN pg_catalog.pg_class AS cl ON co.conrelid = cl.oid
221:                 JOIN pg_catalog.pg_class AS cf ON co.confrelid = cf.oid
222:                 JOIN pg_catalog.pg_attribute AS al ON al.attrelid = cl.oid AND al.attnum = co.conkey[1]
223:                 JOIN pg_catalog.pg_attribute AS af ON af.attrelid = cf.oid AND af.attnum = co.confkey[1]
224:             WHERE
225:                 n.nspname = current_schema()
226:                 AND co.contype = 'f'
227:                 AND cl.relname = {$this->connection->quote($table)}
228:         ")->fetchAll();
229:     }
230: 
231: 
232:     /**
233:      * @return bool
234:      */
235:     public function isSupported($item)
236:     {
237:         return $item === self::SUPPORT_COLUMNS_META || $item === self::SUPPORT_SEQUENCE;
238:     }
239: 
240: }
241: 
Nette Framework 2.0.12 API API documentation generated by ApiGen 2.8.0