/**
* Returns a series of strings concatinated
*
* concat() accepts an arbitrary number of parameters. Each parameter
* must contain an expression or an array with expressions.
*
* @throws ezcQueryVariableException if no parameters are provided
* @param string|array(string) $... strings that will be concatinated.
* @return string
*/
public function concat()
{
$args = func_get_args();
$cols = ezcQuery::arrayFlatten($args);
if (count($cols) < 1) {
throw new ezcQueryVariableParameterException('concat', count($args), 1);
}
$cols = $this->getIdentifiers($cols);
return join(' || ', $cols);
}
/**
* Binds the value $value to the specified variable name $placeHolder.
*
* This method uses ezcQuery::bindParam() from the ezcQuery class in which
* the subSelect was called. Info about bound parameters are stored in
* the parent ezcQuery object that is stored in the $outer property.
*
* The parameter $value specifies the value that you want to bind. If
* $placeholder is not provided bindValue() will automatically create a
* placeholder for you. An automatic placeholder will be of the name
* 'ezcValue1', 'ezcValue2' etc.
*
* Example:
* <code>
* <?php
* $value = 2;
* $subSelect = $q->subSelect();
* $subSelect->select( name )
* ->from( 'table2' )
* ->where( $subSelect->expr->in(
* 'id', $subSelect->bindValue( $value )
* )
* );
*
* $q->select( '*' )
* ->from( 'table1' )
* ->where ( $q->expr->eq( 'name', $subSelect ) );
*
* $stmt = $q->prepare(); // the $value is bound to the query.
* $value = 4;
* $stmt->execute(); // subselect executed with 'id = 2'
* ?>
* </code>
*
* @see ezcQuery::bindValue()
*
* @param mixed $value
* @param string $placeHolder the name to bind with. The string must start with a colon ':'.
* @return string the placeholder name used.
*/
public function bindValue($value, $placeHolder = null, $type = PDO::PARAM_STR)
{
return $this->outerQuery->bindValue($value, $placeHolder, $type);
}
/**
* Constructs a new ezcQueryDelete that works on the database $db and with the aliases $aliases.
*
* The paramters are passed directly to ezcQuery.
* @param PDO $db
* @param array(string=>string) $aliases
*/
public function __construct(PDO $db, array $aliases = array())
{
parent::__construct($db, $aliases);
}
public function __construct()
{
parent::__construct(ezcDbInstance::get());
}
/**
* Sets find query value for many-to-many related objects.
*
* Manipulates the find $query for objects related to the object defined in
* $objectState, defined my the relation $relation.
*
* @param ezcQuery $query
* @param ezcPersistentObjectDefinition $def
* @param ezcPersistentManyToManyRelation $relation
* @param array $objectState
*/
private function createComplexRelationFindQuery(ezcQuery $query, ezcPersistentObjectDefinition $def, ezcPersistentManyToManyRelation $relation, array $objectState)
{
$db = $this->database;
$relationTableQuoted = $db->quoteIdentifier($relation->relationTable);
// Join with relation table.
$query->from($relationTableQuoted);
foreach ($relation->columnMap as $map) {
$query->where($query->expr->eq($relationTableQuoted . "." . $db->quoteIdentifier($map->relationSourceColumn), $query->bindValue($objectState[$def->columns[$map->sourceColumn]->propertyName], null, $def->columns[$map->sourceColumn]->databaseType)), $query->expr->eq($relationTableQuoted . "." . $db->quoteIdentifier($map->relationDestinationColumn), $db->quoteIdentifier($relation->destinationTable) . "." . $db->quoteIdentifier($map->destinationColumn)));
}
}
/**
* Limits the given $query to the subtree starting at $rootLocationId
*
* @param \ezcQuery $query
* @param string $rootLocationId
*
* @return void
*/
protected function applySubtreeLimitation(\ezcQuery $query, $rootLocationId)
{
$query->where($query->expr->like($this->handler->quoteColumn('path_string', 'ezcontentobject_tree'), $query->bindValue('%/' . $rootLocationId . '/%')));
}
/**
* Performs the given query.
*
* Performs the $query, checks for errors and throws an exception in case.
* Returns the generated statement object on success. If the $transaction
* parameter is set to true, the query is excuted transaction save.
*
* @param ezcQuery $q
* @param bool $transaction
* @return PDOStatement
*
* @access private
*/
public function performQuery(ezcQuery $q, $transaction = false)
{
if ($transaction) {
$this->database->beginTransaction();
}
try {
$stmt = $q->prepare();
$stmt->execute();
if (($errCode = $stmt->errorCode()) != 0) {
if ($transaction) {
$this->database->rollback();
}
throw new ezcPersistentQueryException("The query returned error code {$errCode}.", $q);
}
if ($transaction) {
$this->database->commit();
}
return $stmt;
} catch (PDOException $e) {
if ($transaction) {
$this->database->rollback();
}
throw new ezcPersistentQueryException($e->getMessage(), $q);
}
}