private static void ProcessDeleteEntries(string args)
{
Regex deleteRegex = new Regex(@"^(?<table>(?:(?:\[(?:\S| )+\])|\S|\.)+)(?: (?<defaultDeleteAction>" + string.Join("|", SUPPORTED_DELETE_ACTIONS) + @"))?(?: (?:-d (?<d>(?: ?(?<foreignKey>(?:(?:\[(?:\S| )+\])|\S|\.)+)\=(?<deleteAction>" + string.Join("|", SUPPORTED_DELETE_ACTIONS) + @"))+)))?(?: (?:-c (?<c>.+)))?$");
Match deleteMatch = deleteRegex.Match(args);
DatabaseObject deleteTable;
if (!deleteMatch.Success)
{
Console.WriteLine($"Error: Invalid syntax for command {DELETE_ENTRIES_COMMAND}, syntax information can be showed by typing: help {DELETE_ENTRIES_COMMAND}");
return;
}
else if (!_tableByName.TryGetValue(deleteMatch.Groups["table"].Value.Replace("[", "").Replace("]", "").ToLower(), out deleteTable))
{
Console.WriteLine($"Error: Table {deleteMatch.Groups["table"].Value} not found");
return;
}
string conditions = "";
ForeignKey.DeleteActions?defaultDeleteAction = null;
if (deleteMatch.Groups["c"].Success)
{
conditions = deleteMatch.Groups["c"].Value;
}
if (deleteMatch.Groups["defaultDeleteAction"].Success)
{
if (DELETE_ACTION_CONVERTOR.ContainsKey(deleteMatch.Groups["defaultDeleteAction"].Value.ToUpper()))
{
defaultDeleteAction = DELETE_ACTION_CONVERTOR[deleteMatch.Groups["defaultDeleteAction"].Value.ToUpper()];
}
else
{
Console.WriteLine($"Error: Unsupported default delete action, {SUPPORTED_DELETE_ACTION_VALUES_TEXT}");
return;
}
}
IDictionary <string, ForeignKey.DeleteActions> overrideDeleteActions = new Dictionary <string, ForeignKey.DeleteActions>();
if (deleteMatch.Groups["foreignKey"].Success)
{
for (int i = 0; i < deleteMatch.Groups["foreignKey"].Captures.Count; i++)
{
ForeignKey.DeleteActions deleteAction;
if (DELETE_ACTION_CONVERTOR.TryGetValue(deleteMatch.Groups["deleteAction"].Captures[i].Value.ToUpper(), out deleteAction))
{
overrideDeleteActions.Add(deleteMatch.Groups["foreignKey"].Captures[i].Value.ToLower(), deleteAction);
}
else
{
Console.WriteLine($"Error: Unsupported default delete action {deleteMatch.Groups["defaultDeleteAction"].Value} at foreign key {deleteMatch.Groups["foreignKey"].Captures[i].Value}, {SUPPORTED_DELETE_ACTION_VALUES_TEXT}");
return;
}
}
}
ISet <DependencyEdge> edges = _dependencies.GetDescendantEdges(deleteTable);
IDictionary <ForeignKey, ForeignKey.DeleteActions> foreignKeyDeleteActions = new Dictionary <ForeignKey, ForeignKey.DeleteActions>(edges.Count);
foreach (DependencyEdge edge in edges)
{
ForeignKey.DeleteActions?overrideDeleteAction;
if (overrideDeleteActions.ContainsKey(edge.ForeignKey.Name.ToLower()))
{
overrideDeleteAction = overrideDeleteActions[edge.ForeignKey.Name.ToLower()];
}
else
{
overrideDeleteAction = defaultDeleteAction;
}
if (overrideDeleteAction == null)
{
foreignKeyDeleteActions.Add(edge.ForeignKey, edge.ForeignKey.DeleteAction);
}
else if (overrideDeleteAction.Value == ForeignKey.DeleteActions.SetDefault && edge.ForeignKey.HasDefaultValue)
{
foreignKeyDeleteActions.Add(edge.ForeignKey, ForeignKey.DeleteActions.SetDefault);
}
else if (overrideDeleteAction.Value == ForeignKey.DeleteActions.SetNull && edge.ForeignKey.CanBeNull)
{
foreignKeyDeleteActions.Add(edge.ForeignKey, ForeignKey.DeleteActions.SetNull);
}
else
{
foreignKeyDeleteActions.Add(edge.ForeignKey, overrideDeleteAction.Value);
}
}
try
{
Console.WriteLine("Delete procedure is running");
string deleteQuery = _optimizer.DeleteEntriesFromTable(deleteTable, conditions, foreignKeyDeleteActions);
Console.WriteLine(deleteQuery);
Database.Instance.ExecuteNonResultQuery(deleteQuery);
Console.WriteLine("Delete procedure was completed");
}
catch (DatabaseException exc)
{
Debug.WriteLine(exc);
Console.WriteLine($"Error: cannot get data - {exc.InnerException.Message}");
return;
}
catch (DeleteDependencyException exc)
{
Debug.WriteLine(exc);
Console.WriteLine($"Error: cannot get data - {exc.Message}");
return;
}
catch (SqlException exc)
{
Debug.WriteLine(exc);
Console.WriteLine("Error: delete query failed");
return;
}
}