Source for file Pgsql.php
Documentation is available at Pgsql.php
* $Id: Pgsql.php 2276 2007-08-25 08:06:17Z lukenukem $
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.phpdoctrine.com>.
* Doctrine_Expression_Pgsql
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @category Object Relational Mapping
* @link www.phpdoctrine.com
* @version $Revision: 2276 $
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
* Returns the md5 sum of a field.
* Note: Not SQL92, but common functionality
* md5() works with the default PostgreSQL 8 versions.
* If you are using PostgreSQL 7.x or older you need
* to make sure that the digest procedure is installed.
* If you use RPMS (Redhat and Mandrake) install the postgresql-contrib
* package. You must then install the procedure by running this shell command:
* psql [dbname] < /usr/share/pgsql/contrib/pgcrypto.sql
* You should make sure you run this as the postgres user.
public function md5($column)
if ($this->version >
7) {
return 'MD5(' .
$column .
')';
return 'encode(digest(' .
$column .
', md5), hex)';
* Returns part of a string.
* Note: Not SQL92, but common functionality.
* @param string $value the target $value the string or the string column.
* @param int $from extract from this characeter.
* @param int $len extract this amount of characters.
* @return string sql that extracts part of a string.
public function substring($value, $from, $len =
null)
return 'SUBSTR(' .
$value .
', ' .
$from .
')';
return 'SUBSTR(' .
$value .
', ' .
$from .
', ' .
$len .
')';
* Returns a series of strings concatinated
* concat() accepts an arbitrary number of parameters. Each parameter
* must contain an expression or an array with expressions.
* @param string|array(string)strings that will be concatinated.
* PostgreSQLs AGE(<timestamp1> [, <timestamp2>]) function.
* @param string $timestamp1 timestamp to subtract from NOW()
* @param string $timestamp2 optional; if given: subtract arguments
public function age($timestamp1, $timestamp2 =
null) {
if( $timestamp2 ==
null ) {
return 'AGE(' .
$timestamp1 .
')';
return 'AGE(' .
$timestamp1 .
', ' .
$timestamp2 .
')';
* PostgreSQLs DATE_PART( <text>, <time> ) function.
* @param string $text what to extract
* @param string $time timestamp or interval to extract from
return 'DATE_PART(' .
$text .
', ' .
$time .
')';
return join(' || ' , $args);
* Returns the SQL string to return the current system date and time.
return 'LOCALTIMESTAMP(0)';
* @return string the regular expression operator
* return string to call a function to get random value inside an SQL statement
* @return return string to generate float between 0 and 1
* build a pattern matching string
* WARNING: this function is experimental and may change signature at
* any time until labelled as non-experimental
* @param array $pattern even keys are strings, odd are patterns (% and _)
* @param string $operator optional pattern operator (LIKE, ILIKE and maybe others in the future)
* @param string $field optional field name that is being matched against
* (might be required when emulating ILIKE)
* @return string SQL pattern
public function matchPattern($pattern, $operator =
null, $field =
null)
$field =
is_null($field) ?
'' :
$field.
' ';
$match =
$field.
'ILIKE ';
throw
new Doctrine_Expression_Pgsql_Exception('not a supported operator type:'.
$operator);
foreach ($pattern as $key =>
$value) {
$match.=
$this->conn->escapePattern($this->conn->escape($value));
$match.=
$this->patternEscapeString();