/library/Doctrine/Doctrine/Expression/Driver.php
PHP | 773 lines | 239 code | 49 blank | 485 comment | 10 complexity | 0d5933d290fe1cf099408f657afe87d5 MD5 | raw file
- <?php
- /*
- * $Id$
- *
- * 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.org>.
- */
-
- /**
- * Doctrine_Expression_Driver
- *
- * @package Doctrine
- * @subpackage Expression
- * @license http://www.opensource.org/licenses/lgpl-license.php LGPL
- * @link www.phpdoctrine.org
- * @since 1.0
- * @version $Revision$
- * @author Konsta Vesterinen <kvesteri@cc.hut.fi>
- */
- class Doctrine_Expression_Driver extends Doctrine_Connection_Module
- {
- public function getIdentifier($column)
- {
- return $column;
- }
- public function getIdentifiers($columns)
- {
- return $columns;
- }
-
- /**
- * regexp
- * returns the regular expression operator
- *
- * @return string
- */
- public function regexp()
- {
- throw new Doctrine_Expression_Exception('Regular expression operator is not supported by this database driver.');
- }
-
- /**
- * Returns the average value of a column
- *
- * @param string $column the column to use
- * @return string generated sql including an AVG aggregate function
- */
- public function avg($column)
- {
- $column = $this->getIdentifier($column);
- return 'AVG(' . $column . ')';
- }
-
- /**
- * Returns the number of rows (without a NULL value) of a column
- *
- * If a '*' is used instead of a column the number of selected rows
- * is returned.
- *
- * @param string|integer $column the column to use
- * @return string generated sql including a COUNT aggregate function
- */
- public function count($column)
- {
- $column = $this->getIdentifier($column);
- return 'COUNT(' . $column . ')';
- }
-
- /**
- * Returns the highest value of a column
- *
- * @param string $column the column to use
- * @return string generated sql including a MAX aggregate function
- */
- public function max($column)
- {
- $column = $this->getIdentifier($column);
- return 'MAX(' . $column . ')';
- }
-
- /**
- * Returns the lowest value of a column
- *
- * @param string $column the column to use
- * @return string
- */
- public function min($column)
- {
- $column = $this->getIdentifier($column);
- return 'MIN(' . $column . ')';
- }
-
- /**
- * Returns the total sum of a column
- *
- * @param string $column the column to use
- * @return string
- */
- public function sum($column)
- {
- $column = $this->getIdentifier($column);
- return 'SUM(' . $column . ')';
- }
-
- // scalar functions
-
- /**
- * Returns the md5 sum of a field.
- *
- * Note: Not SQL92, but common functionality
- *
- * @return string
- */
- public function md5($column)
- {
- $column = $this->getIdentifier($column);
- return 'MD5(' . $column . ')';
- }
-
- /**
- * Returns the length of a text field.
- *
- * @param string $expression1
- * @param string $expression2
- * @return string
- */
- public function length($column)
- {
- $column = $this->getIdentifier($column);
- return 'LENGTH(' . $column . ')';
- }
-
- /**
- * Rounds a numeric field to the number of decimals specified.
- *
- * @param string $expression1
- * @param string $expression2
- * @return string
- */
- public function round($column, $decimals = 0)
- {
- $column = $this->getIdentifier($column);
-
- return 'ROUND(' . $column . ', ' . $decimals . ')';
- }
-
- /**
- * Returns the remainder of the division operation
- * $expression1 / $expression2.
- *
- * @param string $expression1
- * @param string $expression2
- * @return string
- */
- public function mod($expression1, $expression2)
- {
- $expression1 = $this->getIdentifier($expression1);
- $expression2 = $this->getIdentifier($expression2);
- return 'MOD(' . $expression1 . ', ' . $expression2 . ')';
- }
-
- /**
- * trim
- * returns the string $str with leading and proceeding space characters removed
- *
- * @param string $str literal string or column name
- * @return string
- */
- public function trim($str)
- {
- return 'TRIM(' . $str . ')';
- }
-
- /**
- * rtrim
- * returns the string $str with proceeding space characters removed
- *
- * @param string $str literal string or column name
- * @return string
- */
- public function rtrim($str)
- {
- return 'RTRIM(' . $str . ')';
- }
-
- /**
- * ltrim
- * returns the string $str with leading space characters removed
- *
- * @param string $str literal string or column name
- * @return string
- */
- public function ltrim($str)
- {
- return 'LTRIM(' . $str . ')';
- }
-
- /**
- * upper
- * Returns the string $str with all characters changed to
- * uppercase according to the current character set mapping.
- *
- * @param string $str literal string or column name
- * @return string
- */
- public function upper($str)
- {
- return 'UPPER(' . $str . ')';
- }
-
- /**
- * lower
- * Returns the string $str with all characters changed to
- * lowercase according to the current character set mapping.
- *
- * @param string $str literal string or column name
- * @return string
- */
- public function lower($str)
- {
- return 'LOWER(' . $str . ')';
- }
-
- /**
- * locate
- * returns the position of the first occurrence of substring $substr in string $str
- *
- * @param string $substr literal string to find
- * @param string $str literal string
- * @return integer
- */
- public function locate($str, $substr)
- {
- return 'LOCATE(' . $str . ', ' . $substr . ')';
- }
-
- /**
- * Returns the current system date.
- *
- * @return string
- */
- public function now()
- {
- return 'NOW()';
- }
-
- /**
- * soundex
- * Returns a string to call a function to compute the
- * soundex encoding of a string
- *
- * The string "?000" is returned if the argument is NULL.
- *
- * @param string $value
- * @return string SQL soundex function with given parameter
- */
- public function soundex($value)
- {
- throw new Doctrine_Expression_Exception('SQL soundex function not supported by this driver.');
- }
-
- /**
- * return string to call a function to get a substring inside an SQL statement
- *
- * Note: Not SQL92, but common functionality.
- *
- * SQLite only supports the 2 parameter variant of this function
- *
- * @param string $value an sql string literal or column name/alias
- * @param integer $position where to start the substring portion
- * @param integer $length the substring portion length
- * @return string SQL substring function with given parameters
- */
- public function substring($value, $from, $len = null)
- {
- $value = $this->getIdentifier($value);
- if ($len === null)
- return 'SUBSTRING(' . $value . ' FROM ' . $from . ')';
- else {
- $len = $this->getIdentifier($len);
- return 'SUBSTRING(' . $value . ' FROM ' . $from . ' FOR ' . $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.
- */
- public function concat()
- {
- $args = func_get_args();
-
- return 'CONCAT(' . join(', ', (array) $args) . ')';
- }
-
- /**
- * Returns the SQL for a logical not.
- *
- * Example:
- * <code>
- * $q = new Doctrine_Query();
- * $e = $q->expr;
- * $q->select('*')->from('table')
- * ->where($e->eq('id', $e->not('null'));
- * </code>
- *
- * @return string a logical expression
- */
- public function not($expression)
- {
- $expression = $this->getIdentifier($expression);
- return 'NOT(' . $expression . ')';
- }
-
- /**
- * Returns the SQL to perform the same mathematical operation over an array
- * of values or expressions.
- *
- * basicMath() accepts an arbitrary number of parameters. Each parameter
- * must contain a value or an expression or an array with values or
- * expressions.
- *
- * @param string $type the type of operation, can be '+', '-', '*' or '/'.
- * @param string|array(string)
- * @return string an expression
- */
- private function basicMath($type, array $args)
- {
- $elements = $this->getIdentifiers($args);
- if (count($elements) < 1) {
- return '';
- }
- if (count($elements) == 1) {
- return $elements[0];
- } else {
- return '(' . implode(' ' . $type . ' ', $elements) . ')';
- }
- }
-
- /**
- * Returns the SQL to add values or expressions together.
- *
- * add() accepts an arbitrary number of parameters. Each parameter
- * must contain a value or an expression or an array with values or
- * expressions.
- *
- * Example:
- * <code>
- * $q = new Doctrine_Query();
- * $e = $q->expr;
- *
- * $q->select('u.*')
- * ->from('User u')
- * ->where($e->eq($e->add('id', 2), 12));
- * </code>
- *
- * @param string|array(string)
- * @return string an expression
- */
- public function add(array $args)
- {
- return $this->basicMath('+', $args);
- }
-
- /**
- * Returns the SQL to subtract values or expressions from eachother.
- *
- * subtract() accepts an arbitrary number of parameters. Each parameter
- * must contain a value or an expression or an array with values or
- * expressions.
- *
- * Example:
- * <code>
- * $q = new Doctrine_Query();
- * $e = $q->expr;
- *
- * $q->select('u.*')
- * ->from('User u')
- * ->where($e->eq($e->sub('id', 2), 12));
- * </code>
- *
- * @param string|array(string)
- * @return string an expression
- */
- public function sub(array $args)
- {
- return $this->basicMath('-', $args );
- }
-
- /**
- * Returns the SQL to multiply values or expressions by eachother.
- *
- * multiply() accepts an arbitrary number of parameters. Each parameter
- * must contain a value or an expression or an array with values or
- * expressions.
- *
- * Example:
- * <code>
- * $q = new Doctrine_Query();
- * $e = $q->expr;
- *
- * $q->select('u.*')
- * ->from('User u')
- * ->where($e->eq($e->mul('id', 2), 12));
- * </code>
- *
- * @param string|array(string)
- * @return string an expression
- */
- public function mul(array $args)
- {
- return $this->basicMath('*', $args);
- }
-
- /**
- * Returns the SQL to divide values or expressions by eachother.
- *
- * divide() accepts an arbitrary number of parameters. Each parameter
- * must contain a value or an expression or an array with values or
- * expressions.
- *
- * Example:
- * <code>
- * $q = new Doctrine_Query();
- * $e = $q->expr;
- *
- * $q->select('u.*')
- * ->from('User u')
- * ->where($e->eq($e->div('id', 2), 12));
- * </code>
- *
- * @param string|array(string)
- * @return string an expression
- */
- public function div(array $args)
- {
- return $this->basicMath('/', $args);
- }
-
- /**
- * Returns the SQL to check if two values are equal.
- *
- * Example:
- * <code>
- * $q = new Doctrine_Query();
- * $q->select('u.*')
- * ->from('User u')
- * ->where($q->expr->eq('id', 1));
- * </code>
- *
- * @param string $value1 logical expression to compare
- * @param string $value2 logical expression to compare with
- * @return string logical expression
- */
- public function eq($value1, $value2)
- {
- $value1 = $this->getIdentifier($value1);
- $value2 = $this->getIdentifier($value2);
- return $value1 . ' = ' . $value2;
- }
-
- /**
- * Returns the SQL to check if two values are unequal.
- *
- * Example:
- * <code>
- * $q = new Doctrine_Query();
- * $q->select('u.*')
- * ->from('User u')
- * ->where($q->expr->neq('id', 1));
- * </code>
- *
- * @param string $value1 logical expression to compare
- * @param string $value2 logical expression to compare with
- * @return string logical expression
- */
- public function neq($value1, $value2)
- {
- $value1 = $this->getIdentifier($value1);
- $value2 = $this->getIdentifier($value2);
- return $value1 . ' <> ' . $value2;
- }
-
- /**
- * Returns the SQL to check if one value is greater than another value.
- *
- * Example:
- * <code>
- * $q = new Doctrine_Query();
- * $q->select('u.*')
- * ->from('User u')
- * ->where($q->expr->gt('id', 1));
- * </code>
- *
- * @param string $value1 logical expression to compare
- * @param string $value2 logical expression to compare with
- * @return string logical expression
- */
- public function gt($value1, $value2)
- {
- $value1 = $this->getIdentifier($value1);
- $value2 = $this->getIdentifier($value2);
- return $value1 . ' > ' . $value2;
- }
-
- /**
- * Returns the SQL to check if one value is greater than or equal to
- * another value.
- *
- * Example:
- * <code>
- * $q = new Doctrine_Query();
- * $q->select('u.*')
- * ->from('User u')
- * ->where($q->expr->gte('id', 1));
- * </code>
- *
- * @param string $value1 logical expression to compare
- * @param string $value2 logical expression to compare with
- * @return string logical expression
- */
- public function gte($value1, $value2)
- {
- $value1 = $this->getIdentifier($value1);
- $value2 = $this->getIdentifier($value2);
- return $value1 . ' >= ' . $value2;
- }
-
- /**
- * Returns the SQL to check if one value is less than another value.
- *
- * Example:
- * <code>
- * $q = new Doctrine_Query();
- * $q->select('u.*')
- * ->from('User u')
- * ->where($q->expr->lt('id', 1));
- * </code>
- *
- * @param string $value1 logical expression to compare
- * @param string $value2 logical expression to compare with
- * @return string logical expression
- */
- public function lt($value1, $value2)
- {
- $value1 = $this->getIdentifier($value1);
- $value2 = $this->getIdentifier($value2);
- return $value1 . ' < ' . $value2;
- }
-
- /**
- * Returns the SQL to check if one value is less than or equal to
- * another value.
- *
- * Example:
- * <code>
- * $q = new Doctrine_Query();
- * $q->select('u.*')
- * ->from('User u')
- * ->where($q->expr->lte('id', 1));
- * </code>
- *
- * @param string $value1 logical expression to compare
- * @param string $value2 logical expression to compare with
- * @return string logical expression
- */
- public function lte($value1, $value2)
- {
- $value1 = $this->getIdentifier($value1);
- $value2 = $this->getIdentifier($value2);
- return $value1 . ' <= ' . $value2;
- }
-
- /**
- * Returns the SQL to check if a value is one in a set of
- * given values..
- *
- * in() accepts an arbitrary number of parameters. The first parameter
- * must always specify the value that should be matched against. Successive
- * must contain a logical expression or an array with logical expressions.
- * These expressions will be matched against the first parameter.
- *
- * Example:
- * <code>
- * $q = new Doctrine_Query();
- * $q->select('u.*')
- * ->from('User u')
- * ->where($q->expr->in( 'id', array(1,2,3)));
- * </code>
- *
- * @param string $column the value that should be matched against
- * @param string|array(string) values that will be matched against $column
- * @return string logical expression
- */
- public function in($column, $values)
- {
- if ( ! is_array($values)) {
- $values = array($values);
- }
- $values = $this->getIdentifiers($values);
- $column = $this->getIdentifier($column);
-
- if (count($values) == 0) {
- throw new Doctrine_Expression_Exception('Values array for IN operator should not be empty.');
- }
- return $column . ' IN (' . implode(', ', $values) . ')';
- }
-
- /**
- * Returns SQL that checks if a expression is null.
- *
- * Example:
- * <code>
- * $q = new Doctrine_Query();
- * $q->select('u.*')
- * ->from('User u')
- * ->where($q->expr->isNull('id'));
- * </code>
- *
- * @param string $expression the expression that should be compared to null
- * @return string logical expression
- */
- public function isNull($expression)
- {
- $expression = $this->getIdentifier($expression);
- return $expression . ' IS NULL';
- }
-
- /**
- * Returns SQL that checks if a expression is not null.
- *
- * Example:
- * <code>
- * $q = new Doctrine_Query();
- * $q->select('u.*')
- * ->from('User u')
- * ->where($q->expr->isNotNull('id'));
- * </code>
- *
- * @param string $expression the expression that should be compared to null
- * @return string logical expression
- */
- public function isNotNull($expression)
- {
- $expression = $this->getIdentifier($expression);
- return $expression . ' IS NOT NULL';
- }
-
- /**
- * Returns SQL that checks if an expression evaluates to a value between
- * two values.
- *
- * The parameter $expression is checked if it is between $value1 and $value2.
- *
- * Note: There is a slight difference in the way BETWEEN works on some databases.
- * http://www.w3schools.com/sql/sql_between.asp. If you want complete database
- * independence you should avoid using between().
- *
- * Example:
- * <code>
- * $q = new Doctrine_Query();
- * $q->select('u.*')
- * ->from('User u')
- * ->where($q->expr->between('id', 1, 5));
- * </code>
- *
- * @param string $expression the value to compare to
- * @param string $value1 the lower value to compare with
- * @param string $value2 the higher value to compare with
- * @return string logical expression
- */
- public function between($expression, $value1, $value2)
- {
- $expression = $this->getIdentifier($expression);
- $value1 = $this->getIdentifier($value1);
- $value2 = $this->getIdentifier($value2);
- return $expression . ' BETWEEN ' .$value1 . ' AND ' . $value2;
- }
-
- /**
- * Returns global unique identifier
- *
- * @return string to get global unique identifier
- */
- public function guid()
- {
- throw new Doctrine_Expression_Exception('method not implemented');
- }
-
- /**
- * returns arcus cosine SQL string
- *
- * @return string
- */
- public function acos($value)
- {
- return 'ACOS(' . $value . ')';
- }
-
- /**
- * sin
- *
- * @param string $value
- * @return void
- */
- public function sin($value)
- {
- return 'SIN(' . $value . ')';
- }
-
- /**
- * pi
- *
- * @return void
- */
- public function pi()
- {
- return 'PI()';
- }
-
- /**
- * cos
- *
- * @param string $value
- * @return void
- */
- public function cos($value)
- {
- return 'COS(' . $value . ')';
- }
-
- /**
- * coalesce
- *
- * @return string
- */
- public function coalesce()
- {
- $args = func_get_args();
-
- return 'COALESCE(' . join(', ', (array) $args) . ')';
- }
-
- /**
- * __call
- *
- * for all native RDBMS functions the function name itself is returned
- */
- public function __call($m, $a)
- {
- if ($this->conn->getAttribute(Doctrine::ATTR_PORTABILITY) & Doctrine::PORTABILITY_EXPR) {
- throw new Doctrine_Expression_Exception('Unknown expression ' . $m);
- }
- return $m . '(' . implode(', ', $a) . ')';
- }
- }