protected function prepareReferencedCubeQueryStatement(AbstractSQLDataSourceQueryHandler $datasourceHandler, DataControllerCallContext $callcontext, Statement $combinedStatement, array $datasetMappedCubeRequests, ReferenceLink $link) { if (!isset($link->nestedLinks)) { return; } $metamodel = data_controller_get_metamodel(); foreach ($link->nestedLinks as $referencedLink) { $referencedRequest = NULL; if (isset($datasetMappedCubeRequests[$referencedLink->dataset->name])) { $referencedRequest = clone $datasetMappedCubeRequests[$referencedLink->dataset->name]; } else { // checking if there is corresponding cube for the referenced dataset $possibleReferencedCube = $metamodel->findCubeByDatasetName($referencedLink->dataset->name); if (isset($possibleReferencedCube)) { $referencedRequest = new CubeQueryRequest($possibleReferencedCube->name); $referencedRequest->referenced = TRUE; $datasetMappedCubeRequests[$possibleReferencedCube->sourceDatasetName] = $referencedRequest; } } if (isset($referencedRequest)) { // preparing parent cube $parentRequest = $datasetMappedCubeRequests[$link->dataset->name]; $parentCubeName = $parentRequest->getCubeName(); $parentCube = $metamodel->getCube($parentCubeName); // preparing referenced cube $referencedCubeName = $referencedRequest->getCubeName(); $referencedCube = $metamodel->getCube($referencedCubeName); // adding required dimensions $joinConditions = NULL; foreach ($referencedLink->parentColumnNames as $columnIndex => $parentColumnName) { // looking for a dimension in parent cube list($parentDimension, ) = $parentCube->getDimensionAndLevelIndexBySourceColumnName($parentColumnName); // looking for a dimension in referenced cube $referencedColumnName = $referencedLink->columnNames[$columnIndex]; list($referencedDimension, ) = $referencedCube->getDimensionAndLevelIndexBySourceColumnName($referencedColumnName); // checking if this dimension is part of query portion of parent request $parentRequestDimensionQuery = $parentRequest->findDimensionQuery($parentDimension->name); if (isset($parentRequestDimensionQuery)) { // preparing level used in this query $parentRequestDimensionLevelIndex4Query = $parentDimension->getLevelIndex($parentRequestDimensionQuery->levelName); // preparing level to be used for the query in referenced request (using the same level index as for parent dimension) $referencedDimensionLevel4Query = $referencedDimension->levels[$parentRequestDimensionLevelIndex4Query]; // copying the query request to referenced cube $referencedRequestDimensionQuery = new __CubeQueryRequest_DimensionQuery($referencedDimension->name, $referencedDimensionLevel4Query->name); $referencedRequestDimensionQuery->values = $parentRequestDimensionQuery->values; $referencedRequest->importDimensionQueryFrom($referencedRequestDimensionQuery); } // checking if there is a related query for parent column name $parentRequestSourceDatasetQuery = $parentRequest->findSourceDatasetPropertyQuery($parentColumnName); if (isset($parentRequestSourceDatasetQuery)) { // copying the query request to referenced cube $referencedRequest->addSourceDatasetPropertyQueryValues($referencedColumnName, $parentRequestSourceDatasetQuery->values); } // checking if this dimension is part of parent request $parentRequestDimension = $parentRequest->findDimension($parentDimension->name); if (!isset($parentRequestDimension)) { // because this dimension is not in list of returned columns we should not use it to link with referenced cube continue; } $selectedParentDimensionLevelIndex = $parentDimension->getLevelIndex($parentRequestDimension->levelName); $selectedParentDimensionLevel = $parentDimension->levels[$selectedParentDimensionLevelIndex]; // preparing level from referenced cube (using the same level index as for parent dimension) $selectedReferencedDimensionLevel = $referencedDimension->levels[$selectedParentDimensionLevelIndex]; $referencedRequest->addDimensionLevel(NULL, $referencedDimension->name, $selectedReferencedDimensionLevel->name); $parentDatabaseColumnName = ParameterHelper::assembleDatabaseColumnName($datasourceHandler->getMaximumEntityNameLength(), $parentRequest->referenced ? ReferencePathHelper::assembleReference($parentCube->sourceDatasetName, $parentDimension->name) : $parentDimension->name, $selectedParentDimensionLevel->name); $referencedDatabaseColumnName = ParameterHelper::assembleDatabaseColumnName($datasourceHandler->getMaximumEntityNameLength(), ReferencePathHelper::assembleReference($referencedCube->sourceDatasetName, $referencedDimension->name), $selectedReferencedDimensionLevel->name); $joinConditions[] = new JoinConditionSection($referencedDatabaseColumnName, new TableColumnConditionSectionValue(self::$TABLE_ALIAS__REFERENCED . $link->linkId, $parentDatabaseColumnName)); } if (!isset($joinConditions)) { throw new IllegalArgumentException(t("There is no common columns to join '@datasetNameA' and '@datasetNameB' datasets", array('@datasetNameA' => $parentCube->publicName, '@datasetNameB' => $referencedCube->publicName))); } // preparing aggregation statement for referenced cube $referencedAggregationStatement = $this->prepareSelectedCubeQueryStatement($datasourceHandler, $callcontext, $referencedRequest); list($isSubqueryRequired, $assembledReferencedCubeSections) = $referencedAggregationStatement->prepareSections(NULL); $referencedCubeSubquerySection = new SubquerySection(Statement::assemble($isSubqueryRequired, NULL, $assembledReferencedCubeSections, Statement::$INDENT_LEFT_OUTER_JOIN_SUBQUERY, FALSE), self::$TABLE_ALIAS__REFERENCED . $referencedLink->linkId); // preparing columns which are returned by referenced aggregation foreach ($referencedAggregationStatement->tables as $table) { if (!isset($table->columns)) { continue; } foreach ($table->columns as $column) { if (!$column->visible) { continue; } $referencedCubeSubquerySection->columns[] = new ColumnSection($column->alias); } } // linking with parent cube foreach ($joinConditions as $joinCondition) { // we do not need to return columns which are used to join with parent cube $referencedCubeSubquerySection->getColumn($joinCondition->subjectColumnName)->visible = FALSE; $referencedCubeSubquerySection->conditions[] = $joinCondition; } // adding to resulting statement $combinedStatement->tables[] = $referencedCubeSubquerySection; // applying referenced cubes measure conditions on resulting statement as well $measureQueries = $referencedRequest->findMeasureQueries(); if (isset($measureQueries)) { foreach ($measureQueries as $measureQuery) { $measureName = ReferencePathHelper::assembleReference($referencedCube->sourceDatasetName, $measureQuery->measureName); $measureDatabaseColumnName = ReferencePathHelper::assembleDatabaseColumnName($datasourceHandler->getMaximumEntityNameLength(), $measureName); foreach ($measureQuery->values as $measureValue) { $combinedStatement->conditions[] = new WhereConditionSection(self::$TABLE_ALIAS__REFERENCED . $referencedLink->linkId, $measureDatabaseColumnName, new ExactConditionSectionValue($datasourceHandler->formatOperatorValue($callcontext, $referencedRequest, $referencedCube->sourceDatasetName, NULL, $measureValue))); } } } } else { throw new UnsupportedOperationException(t('Cube joins using intermediate dataset is not supported yet')); // preparing statement for intermediate dataset $requiredColumnNames = $referencedLink->columnNames; $referencedIntermediateDatasetStatement = $datasourceHandler->prepareDatasetSourceStatement($callcontext, $referencedLink->dataset, $requiredColumnNames); // adding condition to join with parent statement $referencedIntermediateDatasetTableSection = $referencedIntermediateDatasetStatement->tables[0]; foreach ($referencedLink->columnNames as $columnIndex => $referencedColumnName) { $referencedDatabaseColumnName = $referencedColumnName; $parentColumnName = $referencedLink->parentColumnNames[$columnIndex]; $parentDatabaseColumnName = $parentColumnName; $referencedIntermediateDatasetTableSection->conditions[] = new JoinConditionSection($referencedDatabaseColumnName, new TableColumnConditionSectionValue(self::$TABLE_ALIAS__REFERENCED . $link->linkId, $parentDatabaseColumnName)); } $combinedStatement->merge($referencedIntermediateDatasetStatement); } // recursively check nested levels $this->prepareReferencedCubeQueryStatement($datasourceHandler, $callcontext, $combinedStatement, $datasetMappedCubeRequests, $referencedLink); } }