Build the summary query based on a formula
Overrides ArgumentPluginBase::summaryQuery
protected function summaryQuery() {
$this
->ensureMyTable();
// Now that our table is secure, get our formula.
$formula = $this
->getFormula();
// Add the field.
$this->base_alias = $this->name_alias = $this->query
->addField(NULL, $formula, $this->field);
$this->query
->set_count_field(NULL, $formula, $this->field);
return $this
->summaryBasics(FALSE);
}