public function dropDatasetStorage(DataControllerCallContext $callcontext, DropDatasetStorageRequest $request)
{
$environment_metamodel = data_controller_get_environment_metamodel();
$dataset = DatasetTypeHelper::getTableDataset($request->datasetName);
$datasource = $environment_metamodel->getDataSource($dataset->datasourceName);
$sql = $this->getExtension('dropTable')->generate($this, $dataset);
LogHelper::log_info(new StatementLogMessage('table.drop', $sql));
$this->executeStatement($datasource, $sql);
}
public function load(AbstractMetaModelFactory $factory, AbstractMetaModel $metamodel, array $filters = NULL, $finalAttempt)
{
$selectedDataSourceType = $this->selectedDataSourceType();
LogHelper::log_notice(t("Finalizing Dataset Meta Data for '@databaseType' database connections ...", array('@databaseType' => $selectedDataSourceType)));
if ($finalAttempt === FALSE) {
return self::LOAD_STATE__POSTPONED;
}
$finalizedDatasetCount = 0;
$environment_metamodel = data_controller_get_environment_metamodel();
// processing all database connections
foreach ($environment_metamodel->datasources as $datasource) {
if ($datasource->type !== $selectedDataSourceType) {
continue;
}
// selecting datasets which could be processed for the selected connection
$selectedSources = NULL;
foreach ($metamodel->datasets as $dataset) {
// the dataset should belong to the selected data source
if ($dataset->datasourceName !== $datasource->name) {
continue;
}
// the dataset has to be of type table
if (DatasetTypeHelper::detectDatasetSourceType($dataset) !== DatasetTypeHelper::DATASET_SOURCE_TYPE__TABLE) {
continue;
}
// whole dataset meta data was prepared using different method. There is nothing else can be done
if ($dataset->isComplete()) {
continue;
}
$tableName = strtolower($dataset->source);
// invalidating existing column indexes
$dataset->invalidateColumnIndexes();
// there could be several datasets for one table
$selectedSources[$tableName][] = $dataset;
}
if (!isset($selectedSources)) {
continue;
}
$datasourceHandler = DataSourceQueryFactory::getInstance()->getHandler($datasource->type);
$metadataCallback = $datasourceHandler->prepareQueryStatementExecutionCallbackInstance();
// processing meta data for selected datasets
$columnsMetaDataProperties = $this->prepareColumnsMetaDataProperties($datasource, array_keys($selectedSources));
if (isset($columnsMetaDataProperties)) {
foreach ($columnsMetaDataProperties as $columnMetaDataProperties) {
$tableName = strtolower($columnMetaDataProperties[self::PROPERTY__TABLE_NAME]);
$datasets = $selectedSources[$tableName];
foreach ($datasets as $dataset) {
$column = new ColumnMetaData();
$column->name = strtolower($columnMetaDataProperties[self::PROPERTY__COLUMN_NAME]);
$column->columnIndex = $columnMetaDataProperties[self::PROPERTY__COLUMN_INDEX];
// preparing column type
$column->type->databaseType = $columnMetaDataProperties[self::PROPERTY__COLUMN_TYPE];
$column->type->applicationType = $metadataCallback->calculateApplicationDataType($column);
// checking if the column is a system column which should be invisible
if (substr_compare($column->name, DatasetSystemColumnNames::COLUMN_NAME_PREFIX, 0, strlen(DatasetSystemColumnNames::COLUMN_NAME_PREFIX)) === 0) {
$column->visible = FALSE;
}
$dataset->initializeColumnFrom($column);
}
}
}
// marking all selected datasets as completed
foreach ($selectedSources as $datasets) {
foreach ($datasets as $dataset) {
$dataset->markAsComplete();
$finalizedDatasetCount++;
}
}
}
LogHelper::log_info(t('Finalized @datasetCount dataset meta data configurations', array('@datasetCount' => $finalizedDatasetCount)));
return self::LOAD_STATE__SUCCESSFUL;
}
protected function assembleForeignKeyConstraints(DataSourceHandler $handler, DatasetMetaData $dataset, $indent, &$sql)
{
$metamodel = data_controller_get_metamodel();
foreach ($dataset->getColumns() as $column) {
$columnName = $column->name;
if (!isset($column->type->sourceApplicationType)) {
continue;
}
// the column has to contain a reference to another dataset
$dimensionLookupHandler = DimensionLookupFactory::getInstance()->getHandler($column->type->sourceApplicationType);
list($referencedDatasetName) = $dimensionLookupHandler->adjustReferencePointColumn($metamodel, $dataset->name, $column->name);
if ($dataset->name == $referencedDatasetName) {
continue;
}
$referencedDataset = $metamodel->getDataset($referencedDatasetName);
// we can create a foreign key constraint referenced to a table only
$referencedDatasetSourceType = DatasetTypeHelper::detectDatasetSourceType($referencedDataset);
if ($referencedDatasetSourceType != DatasetTypeHelper::DATASET_SOURCE_TYPE__TABLE) {
continue;
}
$referencedOwner = NULL;
if ($dataset->datasourceName != $referencedDataset->datasourceName) {
// if we cannot join datasets we cannot create a foreign key constraint
$datasourceQueryHandler = DataSourceQueryFactory::getInstance()->getHandler($handler->getDataSourceType());
if (!$datasourceQueryHandler->isJoinSupported($dataset->datasourceName, $referencedDataset->datasourceName)) {
continue;
}
$referencedOwner = $handler->getDataSourceOwner($referencedDataset->datasourceName);
}
$referencedTableName = $referencedDataset->source;
$referencedColumnName = $referencedDataset->getKeyColumn()->name;
$sql .= ",\n{$indent}CONSTRAINT fk_{$dataset->source}_{$columnName} FOREIGN KEY ({$columnName}) REFERENCES " . (isset($referencedOwner) ? $referencedOwner . '.' : '') . "{$referencedTableName} ({$referencedColumnName})";
}
}
public function assembleDatasetSourceStatement(DataControllerCallContext $callcontext, DatasetMetaData $dataset, array $columnNames = NULL)
{
$datasetSourceType = DatasetTypeHelper::detectDatasetSourceType($dataset);
switch ($datasetSourceType) {
case DatasetTypeHelper::DATASET_SOURCE_TYPE__TABLE:
$statement = new Statement();
$table = new DatasetSection($dataset);
if (isset($columnNames)) {
foreach ($columnNames as $columnName) {
$table->columns[] = new ColumnSection($columnName);
}
}
$statement->tables[] = $table;
break;
case DatasetTypeHelper::DATASET_SOURCE_TYPE__SUBQUERY:
// FIXME Statement::assemble should indirectly resolve the issue
$TABLE_ALIAS__SUBQUERY = 'b';
$statement = new Statement();
// FIXME do not duplicate code
$table = new SubquerySection($dataset->source, $TABLE_ALIAS__SUBQUERY);
if (isset($columnNames)) {
foreach ($columnNames as $columnName) {
$table->columns[] = new ColumnSection($columnName);
}
}
$statement->tables[] = $table;
break;
case DatasetTypeHelper::DATASET_SOURCE_TYPE__DYNAMIC:
$assembler = $dataset->assembler;
$handler = DatasetSourceAssemblerFactory::getInstance()->getHandler($assembler->type, isset($assembler->config) ? $assembler->config : NULL);
$statement = $handler->assemble($this, $callcontext, $dataset, $columnNames);
break;
default:
throw new IllegalStateException(t('Unsupported dataset source type: @datasetSourceType', array('@datasetSourceType' => $datasetSourceType)));
}
if (!isset($statement)) {
throw new IllegalStateException(t('Could not prepare source statement for the dataset: @datasetName', array('@datasetName' => $dataset->publicName)));
}
return $statement;
}
