public SelectOperation(IExecutionPlanOperation predecessor, Selection selection) { Predecessor = predecessor; this.selection = selection; this.metadata = Predecessor.GetMetadata(); log4net.Config.XmlConfigurator.Configure(); log = LogManager.GetLogger("ExecutionPlan"); }
public NestedLoopJoinOperation(IExecutionPlanOperation predecessor, Filter filter) { Predecessor = predecessor; this.filter = filter; this.metadata = Predecessor.GetMetadata(); log4net.Config.XmlConfigurator.Configure(); log = LogManager.GetLogger("ExecutionPlan"); }
public SelectOperation(IExecutionPlanOperation predecessor, Selection selection) { Predecessor = predecessor; this.selection = selection; this.metadata = Predecessor.GetMetadata(); log4net.Config.XmlConfigurator.Configure(); log = LogManager.GetLogger("ExecutionPlan"); }
public FilterOperation(IExecutionPlanOperation predecessor, Filter filter) { Predecessor = predecessor; this.filter = filter; this.metadata = Predecessor.GetMetadata(); log4net.Config.XmlConfigurator.Configure(); log = LogManager.GetLogger("ExecutionPlan"); }
public IExecutionPlanOperation GetRootOperation() { // If no join then single table select/delete. if (!joins.Any()) { if (filters.Any()) { // Try to get a filter which can use an index. var indexScanFilter = TryGetFilterWithIndex(filters); var firstFilter = indexScanFilter.Key; var table = database.GetTable(firstFilter.Table); IExecutionPlanOperation predecessor = null; if (indexScanFilter.Value != null) { var readOperation = new NonUniqueScanOperation(table, indexScanFilter.Value, firstFilter, repository, KeyValue.GetDatabaseFileName(database.Name), table.Name); predecessor = readOperation; } else { var readOperation = new FullScanOperation(table, repository, KeyValue.GetDatabaseFileName(database.Name), table.Name); predecessor = new FilterOperation(readOperation, firstFilter); } filters.Remove(firstFilter); for (int i = 0; i < filters.Count; i++) { var operation = new FilterOperation(predecessor, filters.ElementAt(i)); predecessor = operation; } if (selections.Any()) { predecessor = new SelectOperation(predecessor, selections.First()); } return(predecessor); } else { var selection = selections.First(); var table = database.GetTable(selection.Table); var fullScanOperation = new FullScanOperation(table, repository, KeyValue.GetDatabaseFileName(database.Name), table.Name); return(new SelectOperation(fullScanOperation, selection)); } } else { // Handle selections with join operation. return(null); } }