/**
* Construct a new SQLSelect.
*
* @param array $select An array of SELECT fields.
* @param array|string $from An array of FROM clauses. The first one should be just the table name.
* Each should be ANSI quoted.
* @param array $where An array of WHERE clauses.
* @param array $orderby An array ORDER BY clause.
* @param array $groupby An array of GROUP BY clauses.
* @param array $having An array of HAVING clauses.
* @param array|string $limit A LIMIT clause or array with limit and offset keys
*/
public function __construct($select = "*", $from = array(), $where = array(), $orderby = array(), $groupby = array(), $having = array(), $limit = array())
{
parent::__construct($from, $where);
$this->setSelect($select);
$this->setOrderBy($orderby);
$this->setGroupBy($groupby);
$this->setHaving($having);
$this->setLimit($limit);
}
/**
* Returns the WHERE clauses ready for inserting into a query.
*
* @param SQLExpression $query The expression object to build from
* @param array $parameters Out parameter for the resulting query parameters
* @return string Completed where condition
*/
public function buildWhereFragment(SQLConditionalExpression $query, array &$parameters)
{
// Get parameterised elements
$where = $query->getWhereParameterised($whereParameters);
if (empty($where)) {
return '';
}
// Join conditions
$connective = $query->getConnective();
$parameters = array_merge($parameters, $whereParameters);
$nl = $this->getSeparator();
return "{$nl}WHERE (" . implode("){$nl}{$connective} (", $where) . ")";
}
/**
* Construct a new SQLDelete.
*
* @param array|string $from An array of Tables (FROM clauses). The first one should be just the table name.
* Each should be ANSI quoted.
* @param array $where An array of WHERE clauses.
* @param array|string $delete The table(s) to delete, if multiple tables are queried from
*/
function __construct($from = array(), $where = array(), $delete = array())
{
parent::__construct($from, $where);
$this->setDelete($delete);
}
public function isEmpty()
{
return empty($this->assignment) || $this->assignment->isEmpty() || parent::isEmpty();
}