public static int DeleteFrom(this IQuery context, ObjectName tableName, SqlQueryExpression query, int limit)
{
IQueryPlanNode plan;
try {
var planValue = query.EvaluateToConstant(context, null);
if (planValue == null)
{
throw new InvalidOperationException();
}
if (!(planValue.Type is QueryType))
{
throw new InvalidOperationException();
}
plan = ((SqlQueryObject)planValue.Value).QueryPlan;
} catch (QueryException) {
throw;
} catch (SecurityException) {
throw;
} catch (Exception ex) {
throw new InvalidOperationException(String.Format("Could not delete from table '{0}': unable to form the delete set.", tableName), ex);
}
var deleteSet = plan.Evaluate(context);
return(context.DeleteFrom(tableName, deleteSet, limit));
}
