/**
* Query vertical (y) axis
*
* @return SimpleQuery
*/
protected function queryYAxis()
{
if ($this->yAxisQuery === null) {
$this->yAxisQuery = clone $this->baseQuery;
$this->yAxisQuery->group($this->yAxisColumn);
$this->yAxisQuery->columns(array($this->yAxisColumn));
$this->yAxisQuery->setUseSubqueryCount();
if ($this->yAxisFilter !== null) {
$this->yAxisQuery->addFilter($this->yAxisFilter);
}
if (!$this->yAxisQuery->hasOrder($this->yAxisColumn)) {
$this->yAxisQuery->order($this->yAxisColumn, 'asc');
}
}
return $this->yAxisQuery;
}
/**
* Query vertical (y) axis
*
* @return SimpleQuery
*/
protected function queryYAxis()
{
if ($this->yAxisQuery === null) {
$this->yAxisQuery = clone $this->baseQuery;
$yAxisHeader = $this->getYAxisHeader();
$columns = array($this->yAxisColumn, $yAxisHeader);
$this->yAxisQuery->group(array_unique($columns));
// yAxisColumn and header may be the same column
$this->yAxisQuery->columns($columns);
if ($this->yAxisFilter !== null) {
$this->yAxisQuery->addFilter($this->yAxisFilter);
}
$this->yAxisQuery->order($yAxisHeader, isset($this->order[$yAxisHeader]) ? $this->order[$yAxisHeader] : self::SORT_ASC);
}
return $this->yAxisQuery;
}