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doctrine-dbal
Commit 7f8fc2be authored by zYne's avatar zYne
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added new expression handling methods

parent 1a27a0c9
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Showing with 346 additions and 1 deletion
lib/Doctrine/Expression.php
View file @ 7f8fc2be
......@@ -235,7 +235,6 @@ class Doctrine_Expression extends Doctrine_Connection_Module {
return 'SUBSTRING(' . $value . ' FROM ' . $from . ' FOR ' . $len . ')';
}
}
/**
* Returns a series of strings concatinated
*
......@@ -249,4 +248,350 @@ class Doctrine_Expression extends Doctrine_Connection_Module {
$cols = $this->getIdentifiers($cols);
return 'CONCAT(' . join(', ', $cols) . ')';
}
/**
* 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) {
$args = func_get_args();
$elements = $this->getIdentifiers($elements);
if (count($elements) < 1)
return '';
if (count($elements) == 1) {
return $elements[0];
} else {
return '(' . join(' ' . $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) {
$args = func_get_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 ( ' . join(', ', $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 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;
}
}
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