public override void InlineInitializeOnTriggerBase(
CodegenExpressionRef saiff,
CodegenMethod method,
SAIFFInitializeSymbol symbols,
CodegenClassScope classScope)
{
method.Block
.SetProperty(saiff, "Items", OnSplitItemForge.Make(items, method, symbols, classScope))
.SetProperty(saiff, "IsFirst", Constant(first))
.Expression(ExprDotMethodChain(symbols.GetAddInitSvc(method)).Add("AddReadyCallback", saiff));
}
public static OnTriggerPlan HandleSplitStream(
string aiFactoryProviderClassName,
CodegenNamespaceScope namespaceScope,
string classPostfix,
OnTriggerSplitStreamDesc desc,
StreamSpecCompiled streamSpec,
OnTriggerActivatorDesc activatorResult,
IDictionary<ExprSubselectNode, SubSelectActivationPlan> subselectActivation,
StatementBaseInfo @base,
StatementCompileTimeServices services)
{
var raw = @base.StatementSpec.Raw;
if (raw.InsertIntoDesc == null) {
throw new ExprValidationException(
"Required insert-into clause is not provided, the clause is required for split-stream syntax");
}
if (raw.GroupByExpressions != null && raw.GroupByExpressions.Count > 0 ||
raw.HavingClause != null ||
raw.OrderByList.Count > 0) {
throw new ExprValidationException(
"A group-by clause, having-clause or order-by clause is not allowed for the split stream syntax");
}
var streamName = streamSpec.OptionalStreamName;
if (streamName == null) {
streamName = "stream_0";
}
StreamTypeService typeServiceTrigger = new StreamTypeServiceImpl(
new[] {activatorResult.ActivatorResultEventType},
new[] {streamName},
new[] {true},
false,
false);
// materialize sub-select views
var subselectForges = SubSelectHelperForgePlanner.PlanSubSelect(
@base,
subselectActivation,
new[] {streamSpec.OptionalStreamName},
new[] {activatorResult.ActivatorResultEventType},
new[] {activatorResult.TriggerEventTypeName},
services);
// compile top-level split
var items = new OnSplitItemForge[desc.SplitStreams.Count + 1];
items[0] = OnSplitValidate(
typeServiceTrigger,
@base.StatementSpec,
@base.ContextPropertyRegistry,
null,
@base.StatementRawInfo,
services);
// compile each additional split
var index = 1;
foreach (var splits in desc.SplitStreams) {
var splitSpec = new StatementSpecCompiled();
splitSpec.Raw.InsertIntoDesc = splits.InsertInto;
splitSpec.SelectClauseCompiled = CompileSelectAllowSubselect(splits.SelectClause);
splitSpec.Raw.WhereClause = splits.WhereClause;
PropertyEvaluatorForge optionalPropertyEvaluator = null;
StreamTypeService typeServiceProperty;
if (splits.FromClause != null) {
optionalPropertyEvaluator = PropertyEvaluatorForgeFactory.MakeEvaluator(
splits.FromClause.PropertyEvalSpec,
activatorResult.ActivatorResultEventType,
streamName,
@base.StatementRawInfo,
services);
typeServiceProperty = new StreamTypeServiceImpl(
new[] {optionalPropertyEvaluator.FragmentEventType},
new[] {splits.FromClause.OptionalStreamName},
new[] {true},
false,
false);
}
else {
typeServiceProperty = typeServiceTrigger;
}
items[index] = OnSplitValidate(
typeServiceProperty,
splitSpec,
@base.ContextPropertyRegistry,
optionalPropertyEvaluator,
@base.StatementRawInfo,
services);
index++;
}
// handle result set processor classes
IList<StmtClassForgable> forgables = new List<StmtClassForgable>();
for (var i = 0; i < items.Length; i++) {
var classNameRSP = CodeGenerationIDGenerator.GenerateClassNameSimple(
typeof(ResultSetProcessorFactoryProvider),
classPostfix + "_" + i);
forgables.Add(
new StmtClassForgableRSPFactoryProvider(
classNameRSP,
items[i].ResultSetProcessorDesc,
namespaceScope,
@base.StatementRawInfo));
items[i].ResultSetProcessorClassName = classNameRSP;
}
// plan table access
var tableAccessForges = ExprTableEvalHelperPlan.PlanTableAccess(@base.StatementSpec.TableAccessNodes);
// build forge
var splitStreamForge = new StatementAgentInstanceFactoryOnTriggerSplitStreamForge(
activatorResult.Activator,
activatorResult.ActivatorResultEventType,
subselectForges,
tableAccessForges,
items,
desc.IsFirst);
var triggerForge = new StmtClassForgableAIFactoryProviderOnTrigger(
aiFactoryProviderClassName,
namespaceScope,
splitStreamForge);
return new OnTriggerPlan(triggerForge, forgables, new SelectSubscriberDescriptor());
}
