private static IList<FilterSpecParam> ComputePermutation(
FilterParamExprMap filterParamExprMap,
object[] permutation,
FilterParamExprMap[][] orNodesMaps,
FilterSpecCompilerArgs args)
{
var mapAll = new FilterParamExprMap();
mapAll.Add(filterParamExprMap);
// combine
for (int orNodeNum = 0; orNodeNum < permutation.Length; orNodeNum++)
{
var orChildNodeNum = permutation[orNodeNum].AsInt();
FilterParamExprMap mapOrSub = orNodesMaps[orNodeNum][orChildNodeNum];
mapAll.Add(mapOrSub);
}
// consolidate across
FilterSpecCompilerConsolidateUtil.Consolidate(mapAll, args.StatementName);
IList<FilterSpecParam> filterParams = new List<FilterSpecParam>();
filterParams.AddAll(mapAll.FilterParams);
int countUnassigned = mapAll.CountUnassignedExpressions();
if (countUnassigned == 0)
{
return filterParams;
}
FilterSpecParamExprNode node = MakeRemainingNode(mapAll.UnassignedExpressions, args);
filterParams.Add(node);
return filterParams;
}
internal static IList<FilterSpecParam>[] PlanFilterParameters(
IList<ExprNode> validatedNodes,
FilterSpecCompilerArgs args)
{
if (validatedNodes.IsEmpty())
{
return AllocateListArray(0);
}
var filterParamExprMap = new FilterParamExprMap();
// Make filter parameter for each expression node, if it can be optimized
DecomposePopulateConsolidate(filterParamExprMap, validatedNodes, args);
// Use all filter parameter and unassigned expressions
IList<FilterSpecParam> filterParams = new List<FilterSpecParam>();
filterParams.AddAll(filterParamExprMap.FilterParams);
int countUnassigned = filterParamExprMap.CountUnassignedExpressions();
// we are done if there are no remaining nodes
if (countUnassigned == 0)
{
return AllocateListArraySizeOne(filterParams);
}
// determine max-width
int filterServiceMaxFilterWidth =
args.ConfigurationInformation.EngineDefaults.ExecutionConfig.FilterServiceMaxFilterWidth;
HintAttribute hint = HintEnum.MAX_FILTER_WIDTH.GetHint(args.Annotations);
if (hint != null)
{
string hintValue = HintEnum.MAX_FILTER_WIDTH.GetHintAssignedValue(hint);
filterServiceMaxFilterWidth = int.Parse(hintValue);
}
IList<FilterSpecParam>[] plan = null;
if (filterServiceMaxFilterWidth > 0)
{
plan = PlanRemainingNodesIfFeasible(filterParamExprMap, args, filterServiceMaxFilterWidth);
}
if (plan != null)
{
return plan;
}
// handle no-plan
FilterSpecParamExprNode node = MakeRemainingNode(filterParamExprMap.UnassignedExpressions, args);
filterParams.Add(node);
return AllocateListArraySizeOne(filterParams);
}