/**
* Generates the raw SQL string for the query.
*
* @return string
*/
public function build()
{
$sql = [$this->select->build(), $this->from->build(), $this->where->build(), $this->groupBy->build(), $this->having->build(), $this->orderBy->build(), $this->limit->build(), $this->union->build()];
$this->values = array_merge($this->where->getValues(), $this->having->getValues(), $this->union->getValues());
$sql = implode(' ', array_filter($sql));
// when there is no select statement then the query
// is probably just a where subquery, thus does
// not need to be prefixed with WHERE
if (substr($sql, 0, 6) === 'WHERE ') {
return substr($sql, 6);
}
return $sql;
}
/**
* Adds a not exists condition to the query.
*
* @param callable $f
*
* @return self
*/
public function notExists(callable $f)
{
$this->where->addNotExistsCondition($f);
return $this;
}