protected function selectBoundary4CubeRequest(DataControllerCallContext $callcontext, CubeQueryRequest $request, $datasetName, $columnName)
{
$isSortAscending = $this->isSortAscending();
$resultColumnName = NULL;
// preparing new cube meta data
$expressionRequest = new CubeQueryRequest($request->getCubeName());
// copying ONLY some query objects (excluding at least a reference to this operator)
// -- dimension queries
$dimensionQueries = $request->findDimensionQueries();
if (isset($dimensionQueries)) {
foreach ($dimensionQueries as $query) {
foreach ($query->values as $propertyValue) {
foreach ($propertyValue->values as $value) {
if ($value->isSubsetBased()) {
// skipping other instances which are based on subset of data if their weight is greater than of this operator
if (isset($value->weight) && $value->weight > $this->operatorHandler->weight) {
continue;
}
}
// updating request configuration for the value supported by this class
if ($this->operatorHandler === $value) {
$resultColumnName = ParameterHelper::assembleParameterName($query->dimensionName, $query->levelName, $propertyValue->name);
// returning only observing property of the dimension level
$expressionRequest->addDimensionLevelProperty(0, $query->dimensionName, $query->levelName, $propertyValue->name);
// ... and excluding NULL values from evaluation
$expressionRequest->addDimensionLevelPropertyQueryValue($query->dimensionName, $query->levelName, $propertyValue->name, data_controller_get_operator_factory_instance()->initiateHandler(NotEqualOperatorHandler::$OPERATOR__NAME, NULL));
// sorting data
$expressionRequest->addOrderByColumn(PropertyBasedComparator_DefaultSortingConfiguration::assembleDirectionalPropertyName($resultColumnName, $isSortAscending));
} else {
$expressionRequest->addDimensionLevelPropertyQueryValue($query->dimensionName, $query->levelName, $propertyValue->name, $value);
}
}
}
}
}
// -- source dataset property queries
$sourceDatasetPropertyQueries = $request->findSourceDatasetPropertyQueries();
if (isset($sourceDatasetPropertyQueries)) {
foreach ($sourceDatasetPropertyQueries as $query) {
foreach ($query->values as $value) {
if ($value->isSubsetBased()) {
throw new UnsupportedOperationException(t('Boundary-related operator cannot filter cube source dataset property values yet'));
}
}
$expressionRequest->queries[] = clone $query;
}
}
// -- measure queries
$measureQueries = $request->findMeasureQueries();
if (isset($measureQueries)) {
foreach ($measureQueries as $query) {
foreach ($query->values as $value) {
if ($value->isSubsetBased()) {
throw new UnsupportedOperationException(t('Boundary-related operator cannot filter measure values yet'));
}
}
$expressionRequest->queries[] = clone $query;
}
}
// limiting response to one record
$expressionRequest->setPagination(1, 0);
return $this->processCubeExpressionRequest($callcontext, $expressionRequest, $resultColumnName);
}