public function assemble(AbstractSQLDataSourceQueryHandler $datasourceHandler, AbstractQueryRequest $request, DatasetMetaData $dataset, array $columnNames = NULL) {
$statement = new Statement();
$TABLE_ALIAS__FACTS = 'dsf';
$TABLE_ALIAS__COLUMN_JOIN = 'cj';
$metamodel = data_controller_get_metamodel();
$cubeName = $dataset->name;
$cube = $metamodel->getCube($cubeName);
$factsDataset = $metamodel->getDataset($cube->factsDatasetName);
self::$TABLE_ALIAS_SUFFIX__SEQUENCE++;
$factsTable = new DatasetSection($factsDataset, $TABLE_ALIAS__FACTS . self::$TABLE_ALIAS_SUFFIX__SEQUENCE);
$statement->tables[] = $factsTable;
foreach ($dataset->getColumns() as $column) {
$columnName = $column->name;
$columnDefaultAlias = NULL;
if (isset($columnNames)) {
$columnDefaultAlias = array_search($columnName, $columnNames);
if ($columnDefaultAlias === FALSE) {
continue;
}
// fixing the alias if the list of columns is not associative array
if (is_int($columnDefaultAlias)) {
$columnDefaultAlias = NULL;
}
}
// FIXME the following code does not work in the following situation:
// 1) we need to query a dataset which is defined in GovDashboard using file upload
// 2) column names are not provided
// 3) for columns which are references to lookup, value from the primary key from lookup table is returned
// even if in definition of the dataset we have columns with the following application type: name@lookup, code @lookup and etc
$isReferenceUsed = FALSE;
$handler = DimensionLookupFactory::getInstance()->findHandler($column->type->getLogicalApplicationType());
if (isset($handler)) {
// FIXME remove this implementation when we implement 'Executable Tree' functionality
list($connectedDatasetName, $connectedColumnName) = $handler->adjustReferencePointColumn($metamodel, $factsDataset->name, $columnName);
if (($connectedDatasetName != $factsDataset->name) || ($connectedColumnName != $columnName)) {
self::$TABLE_ALIAS_SUFFIX__SEQUENCE++;
$columnJoinAliasPrefix = $TABLE_ALIAS__COLUMN_JOIN . self::$TABLE_ALIAS_SUFFIX__SEQUENCE;
$connectedDataset = $metamodel->getDataset($connectedDatasetName);
$connectedDatasetKeyColumnName = $connectedDataset->getKeyColumn()->name;
// preparing list of columns we want to get from connected dataset
$connectedDatasetColumnNames = NULL;
ArrayHelper::addUniqueValue($connectedDatasetColumnNames, $connectedDatasetKeyColumnName);
ArrayHelper::addUniqueValue($connectedDatasetColumnNames, $connectedColumnName);
$connectedStatement = $datasourceHandler->assembleDatasetSourceStatement($request, $connectedDataset, $connectedDatasetColumnNames);
$connectedStatement->addTableAliasPrefix($columnJoinAliasPrefix);
$connectedTable = $connectedStatement->getColumnTable($connectedColumnName);
// registering the column for facts table
$factsTableColumn = new ColumnSection($columnName, 'fact_' . $columnName);
$factsTableColumn->visible = FALSE;
$factsTable->columns[] = $factsTableColumn;
// adjusting key column from lookup
$connectedDatasetKeyColumn = $connectedTable->getColumn($connectedDatasetKeyColumnName);
$connectedDatasetKeyColumn->alias = 'lookup_' . $connectedDatasetKeyColumnName;
$connectedDatasetKeyColumn->visible = FALSE;
// adjusting value column from lookup
$connectedDatasetValueColumn = $connectedTable->getColumn($connectedColumnName);
$connectedDatasetValueColumn->alias = $columnName;
// the key column could be the same as value column
$connectedDatasetValueColumn->visible = TRUE;
// new value column which uses composite name as column alias
if (isset($columnDefaultAlias)) {
$connectedDatasetValueColumn2 = new ColumnSection(
$connectedColumnName,
DataSourceColumnNameHelper::generateFromParameterElements($datasourceHandler->getMaximumEntityNameLength(), $columnDefaultAlias));
$connectedDatasetValueColumn2->visible = FALSE;
$connectedTable->columns[] = $connectedDatasetValueColumn2;
}
// linking the lookup table with the facts table
$connectedTable->conditions[] = new JoinConditionSection(
$connectedDatasetKeyColumn->alias, new TableColumnConditionSectionValue($factsTable->alias, $columnName));
$statement->merge($connectedStatement);
$isReferenceUsed = TRUE;
}
}
if (!$isReferenceUsed) {
$factsTable->columns[] = new ColumnSection($columnName);
}
}
return $statement;
}
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->factsDatasetName] = $referencedRequest;
}
}
if (isset($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
$parentDimension = $parentCube->getDimensionByAttributeColumnName($parentColumnName);
// looking for a dimension in referenced cube
$referencedColumnName = $referencedLink->columnNames[$columnIndex];
$referencedDimension = $referencedCube->getDimensionByAttributeColumnName($referencedColumnName);
// checking if this dimension is part of query portion of parent request
$parentRequestDimensionQuery = $parentRequest->findDimensionQuery($parentDimension->name);
if (isset($parentRequestDimensionQuery)) {
// copying the query request to referenced cube
$referencedRequestDimensionQuery = new __AbstractCubeQueryRequest_DimensionQuery($referencedDimension->name);
$referencedRequestDimensionQuery->columns = $parentRequestDimensionQuery->columns;
$referencedRequest->importDimensionQueryFrom($referencedRequestDimensionQuery);
}
// checking if there is a related query for parent column name
$parentRequestFactsDatasetColumnQuery = $parentRequest->findFactsDatasetColumnQuery($parentColumnName);
if (isset($parentRequestFactsDatasetColumnQuery)) {
// copying the query request to referenced cube
$referencedRequest->addFactsDatasetColumnQueryValues($referencedColumnName, $parentRequestFactsDatasetColumnQuery->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;
}
$referencedRequestDimension = $referencedRequest->addDimension(
NULL, // TODO support requestColumnIndex here
$referencedDimension->name);
$columnNames = $parentRequestDimension->getColumnNames();
if (isset($columnNames)) {
foreach ($columnNames as $columnName) {
$referencedRequestDimension->registerColumnName(
NULL, // TODO support requestColumnIndex here
$columnName);
}
}
else {
// to help the following loop to link cubes by dimension
$columnNames = array(NULL);
}
foreach ($columnNames as $columnName) {
$parentDatabaseColumnName = DataSourceColumnNameHelper::generateFromParameterElements(
$datasourceHandler->getMaximumEntityNameLength(),
($parentRequest->referenced ? ReferencePathHelper::assembleReference($parentCube->factsDatasetName, $parentDimension->name) : $parentDimension->name),
$columnName);
$referencedDatabaseColumnName = DataSourceColumnNameHelper::generateFromParameterElements(
$datasourceHandler->getMaximumEntityNameLength(),
ReferencePathHelper::assembleReference($referencedCube->factsDatasetName, $referencedDimension->name),
$columnName);
$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, $assembledReferencedCubeSections, SelectStatementPrint::INDENT__LEFT_OUTER_JOIN__SUBQUERY, FALSE),
self::$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->factsDatasetName, $measureQuery->name);
$measureDatabaseColumnName = DataSourceColumnNameHelper::generateFromParameterElements(
$datasourceHandler->getMaximumEntityNameLength(), $measureName);
foreach ($measureQuery->values as $value) {
$combinedStatement->conditions[] = new WhereConditionSection(
self::$TABLE_ALIAS__REFERENCED . $referencedLink->linkId,
$measureDatabaseColumnName,
new ExactConditionSectionValue(
$datasourceHandler->formatOperatorValue($callcontext, $referencedRequest, $referencedCube->factsDatasetName, NULL, $value)));
}
}
}
}
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, NULL, $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);
}
}