public function assemble(AbstractSQLDataSourceQueryHandler $datasourceHandler, AbstractQueryRequest $request, DatasetMetaData $dataset, array $columnNames = NULL) {
$engine = QueryEngineFactory::getInstance()->getHandler();
$statement = $engine->newSelectStatement();
// FIXME use the following code
/* // the following code was commended out because functionality in Statement::findColumnTableByReferencePath() $table->dataset->name
$tableName = assemble_database_entity_name($datasourceHandler, $dataset->datasourceName, $dataset->source);
$table = $statement->newTable($tableName);
*/
$table = new DatasetSection($dataset);
$statement->tables[] = $table;
if (isset($columnNames)) {
$columnReferenceFactory = new CompositeColumnReferenceFactory(array(
$dataset,
new FormulaReferenceFactory($request->getFormulas())));
$expressionAssembler = new FormulaExpressionAssembler($columnReferenceFactory);
foreach ($columnNames as $columnName) {
$column = $columnReferenceFactory->findColumn($columnName);
if (isset($column) && ($column->persistence == FormulaMetaData::PERSISTENCE__CALCULATED)) {
$table->newCalculatedColumn($expressionAssembler->assemble($column), $columnName);
}
else {
$table->newColumn($columnName);
}
}
}
return $statement;
}
public function assemble(AbstractSQLDataSourceQueryHandler $datasourceHandler, AbstractQueryRequest $request, DatasetMetaData $dataset, array $columnNames = NULL) {
$engine = QueryEngineFactory::getInstance()->getHandler();
$statement = $engine->newSelectStatement();
$query = $statement->newSubquery($dataset->source);
if (isset($columnNames)) {
foreach ($columnNames as $columnName) {
$query->newColumn($columnName);
}
}
return $statement;
}
public function __construct() {
parent::__construct();
$this->handlerConfigurations = module_invoke_all('dp_query_engine');
}
public function queryCube(DataControllerCallContext $callcontext, CubeQueryRequest $request) {
$cubeName = $request->getCubeName();
LogHelper::log_info(t('Querying SQL-based cube: @cubeName', array('@cubeName' => $cubeName)));
$environment_metamodel = data_controller_get_environment_metamodel();
$metamodel = data_controller_get_metamodel();
$this->getExtension('adjustRequest')->adjustCubeQueryRequest($this, $request);
$callcontext->columnMapping = NULL;
$cube = $metamodel->getCube($cubeName);
$factsDataset = $metamodel->getDataset($cube->factsDatasetName);
$datasource = $environment_metamodel->getDataSource($factsDataset->datasourceName);
$engine = QueryEngineFactory::getInstance()->getHandler();
$generationContext = $engine->prepareStatementGenerationContext($request, $cube);
// aliases for tables
$TABLE_ALIAS__JOIN = 'j';
$tableJoinIndex = 0;
// preparing statement which aggregates data
$aggrStatement = $this->prepareCubeQueryStatement($callcontext, $request);
list($isSubqueryRequired, $assembledAggregationSections) = $aggrStatement->prepareSections(NULL);
// assembling portion of SQL which is responsible for aggregation
if (isset($request->referencedRequests)) {
$joinStatement = $aggrStatement;
// changing alias of first table. This new alias is expected the following code to join with lookup tables
$joinStatement->updateTableAlias($joinStatement->tables[0]->alias, $TABLE_ALIAS__JOIN);
}
else {
$joinStatement = new Statement();
$aggregationTableSection = new SubquerySection(
Statement::assemble($isSubqueryRequired, NULL, $assembledAggregationSections, SelectStatementPrint::INDENT__SUBQUERY, FALSE),
$TABLE_ALIAS__JOIN);
$joinStatement->tables[] = $aggregationTableSection;
}
// adding support for dimension columns
if (isset($request->dimensions)) {
foreach ($request->dimensions as $requestDimension) {
$dimensionName = $requestDimension->name;
$dimension = $cube->findDimension($dimensionName);
// we do not need to map the column. It was done in prepareCubeQueryStatement()
$dimensionDatabaseColumnName = DataSourceColumnNameHelper::generateFromParameterElements($this->getMaximumEntityNameLength(), $dimensionName);
// adding support for dimension column
$dimensionColumn = new ColumnSection($dimensionDatabaseColumnName);
$dimensionColumn->requestColumnIndex = $requestDimension->requestColumnIndex;
$dimensionColumn->visible = isset($requestDimension->requestColumnIndex);
$aggregationTableSection->columns[] = $dimensionColumn;
if (!isset($requestDimension->columns)) {
continue;
}
// preparing list of columns which are accessed by this dataset
$usedColumnNames = NULL;
$dimensionColumnAliasMapping = NULL;
foreach ($requestDimension->columns as $requestColumn) {
$responseColumnName = ParameterNameHelper::assemble($dimensionName, $requestColumn->name);
$databaseColumnName = DataSourceColumnNameHelper::generateFromParameterElements(
$this->getMaximumEntityNameLength(), $dimensionName, $requestColumn->name);
$callcontext->columnMapping[$databaseColumnName] = $responseColumnName;
ArrayHelper::addUniqueValue($usedColumnNames, $requestColumn->name);
$dimensionColumnAliasMapping[$requestColumn->name] = $databaseColumnName;
}
$isJoinWithDimensionDatasetRequired = $generationContext->dimensionJoinPhase[__DefaultQueryEngine_StatementGenerationContext::DIMENSION_JOIN_PHASE__GROUPING_WITH_LOOKUP_AFTER][$dimensionName];
if ($isJoinWithDimensionDatasetRequired) {
$tableJoinIndex++;
$dimensionTableAlias = $TABLE_ALIAS__JOIN . $tableJoinIndex;
$dimensionDataset = $metamodel->getDataset($dimension->datasetName);
$isDimensionKeyColumnAdded = ArrayHelper::addUniqueValue($usedColumnNames, $dimension->key);
$dimensionStatement = $this->prepareDatasetSourceStatement($callcontext, $request, $dimensionDataset, $usedColumnNames);
// updating dimension statement table aliases
$dimensionStatement->addTableAliasPrefix($dimensionTableAlias);
foreach ($dimensionStatement->tables as $table) {
if (!isset($table->columns)) {
$table->columns = array(); // We do not need any columns
}
}
// updating dimension statement column aliases
foreach ($requestDimension->columns as $requestColumn) {
$oldColumnAlias = $requestColumn->name;
$newColumnAlias = $dimensionColumnAliasMapping[$oldColumnAlias];
$dimensionTableSection = $dimensionStatement->getColumnTable($oldColumnAlias, TRUE);
$dimensionColumnSection = $dimensionTableSection->findColumnByAlias($oldColumnAlias);
if (isset($dimensionColumnSection)) {
$dimensionColumnSection->alias = $newColumnAlias;
}
else {
$dimensionColumnSection = new ColumnSection($oldColumnAlias, $newColumnAlias);
$dimensionTableSection->columns[] = $dimensionColumnSection;
}
$dimensionColumnSection->requestColumnIndex = $requestColumn->requestColumnIndex;
}
// adding condition to join with 'main' statement
$dimensionKeyTableSection = $dimensionStatement->getColumnTable($dimension->key);
$dimensionKeyTableSection->conditions[] = new JoinConditionSection(
$dimension->key, new TableColumnConditionSectionValue($TABLE_ALIAS__JOIN, $dimensionDatabaseColumnName));
// merging with 'main' statement
$joinStatement->merge($dimensionStatement);
// we do not need to return dimension key column
if ($isDimensionKeyColumnAdded && isset($dimensionKeyTableSection)) {
// FIXME this code does not work in the following case:
// - our lookup dataset is fact dataset
// - we need to work with project_id column from that dataset
// - the column is present in *_facts and contains numeric value
// - the column is present in *_c_project_id table and contains numeric value
// - column 'value' in *_c_project_id table assigned an alias project_id
// - more about implementation is in ReferenceDimensionDatasetAssembler
// - the code is partially fixed by using $visibleOnly parameter
$tableSection = $dimensionStatement->getColumnTable($dimension->key, TRUE);
$keyColumn = $tableSection->findColumnByAlias($dimension->key);
if (isset($keyColumn)) {
$keyColumn->visible = FALSE;
}
}
}
else {
foreach ($requestDimension->columns as $requestColumn) {
$oldColumnAlias = $requestColumn->name;
$newColumnAlias = $dimensionColumnAliasMapping[$oldColumnAlias];
$column = new ColumnSection($newColumnAlias);
$column->requestColumnIndex = $requestColumn->requestColumnIndex;
$aggregationTableSection->columns[] = $column;
}
}
}
}
$isJoinUsed = $tableJoinIndex > 0;
if ($isJoinUsed) {
// adding measures
if (isset($request->measures)) {
foreach ($request->measures as $requestMeasure) {
$measureName = $requestMeasure->name;
// we do not need to map the column. It was done in prepareCubeQueryStatement()
$databaseColumnName = DataSourceColumnNameHelper::generateFromParameterElements(
$this->getMaximumEntityNameLength(), $measureName);
$measureSection = new ColumnSection($databaseColumnName);
$measureSection->requestColumnIndex = $requestMeasure->requestColumnIndex;
$aggregationTableSection->columns[] = $measureSection;
}
}
list($isSubqueryRequired, $assembledJoinSections) = $joinStatement->prepareSections(NULL);
$sql = Statement::assemble($isSubqueryRequired, NULL, $assembledJoinSections);
}
else {
$sql = Statement::assemble($isSubqueryRequired, NULL, $assembledAggregationSections);
}
// applying sorting
if (isset($request->sortingConfigurations)) {
$adjustedColumns = NULL;
foreach ($request->sortingConfigurations as $sortingConfiguration) {
// TODO try to use the same functionality for list and cube requests
$adjustedColumn = DataSourceColumnNameHelper::generateFromParameterElements(
$this->getMaximumEntityNameLength(),
$sortingConfiguration->rootName, $sortingConfiguration->leafName);
// adjusting direction of the sorting
if (!$sortingConfiguration->isSortAscending) {
$adjustedColumn = $adjustedColumn . ' DESC';
}
$adjustedColumns[] = $adjustedColumn;
}
if (count($adjustedColumns) > 0) {
$sql .= "\n ORDER BY " . implode(', ', $adjustedColumns);
}
}
// applying pagination
$this->applyPagination($request, $sql);
// processing prepared sql and returning data
LogHelper::log_info(new StatementLogMessage('cube.query', $sql));
return $this->executeQuery($callcontext, $datasource, $sql);
}
