public static object DefaultValue(Program program, Schema.ScalarType type)
{
// ScalarType level default trigger handlers
program.Stack.Push(null);
try
{
if (type.HasHandlers())
{
foreach (Schema.EventHandler handler in type.EventHandlers)
{
if ((handler.EventType & EventType.Default) != 0)
{
object result = handler.PlanNode.Execute(program);
if ((result != null) && (bool)result)
{
return(program.Stack.Peek(0));
}
}
}
}
}
finally
{
program.Stack.Pop();
}
if (type.Default != null)
{
return(type.Default.Node.Execute(program));
}
else
{
return(null);
}
}
public static object ValidateValue(Program program, Schema.ScalarType type, object tempValue, Schema.Operator fromOperator)
{
program.Stack.Push(tempValue);
try
{
TableNode.ValidateScalarTypeConstraints(program, type, false);
TableNode.ExecuteScalarTypeValidateHandlers(program, type, fromOperator);
}
finally
{
tempValue = program.Stack.Pop();
}
return(tempValue);
}
/// <summary>Removes cached resolutions involving conversions referencing the given scalar type, if any.</summary>
public void Clear(Schema.ScalarType sourceType, Schema.ScalarType targetType)
{
List <OperatorBindingContext> resolutions = new List <OperatorBindingContext>();
foreach (KeyValuePair <OperatorBindingContext, OperatorBindingContext> entry in _resolutions)
{
foreach (OperatorMatch match in entry.Value.Matches)
{
foreach (ConversionContext conversionContext in match.ConversionContexts)
{
ScalarConversionContext scalarConversionContext = conversionContext as ScalarConversionContext;
if (scalarConversionContext != null)
{
if (!scalarConversionContext.CanConvert && conversionContext.SourceType.Equals(sourceType) || conversionContext.TargetType.Equals(sourceType) || conversionContext.SourceType.Equals(targetType) || conversionContext.TargetType.Equals(targetType))
{
resolutions.Add(entry.Value);
goto Continue;
}
foreach (Schema.ScalarConversionPath path in scalarConversionContext.Paths)
{
if (path.Contains(sourceType) || path.Contains(targetType))
{
resolutions.Add(entry.Value);
goto Continue;
}
}
}
}
}
Continue : continue;
}
foreach (OperatorBindingContext removeContext in resolutions)
{
_resolutions.Remove(removeContext);
}
}
public static object ValidateValue(Program program, Schema.ScalarType type, object tempValue)
{
return(ValidateValue(program, type, tempValue, null));
}
