public static string GetSubqueryInfoText(ExprSubselectNode subselect)
{
string text = "subquery number " + (subselect.SubselectNumber + 1);
StreamSpecRaw streamRaw = subselect.StatementSpecRaw.StreamSpecs[0];
if (streamRaw is FilterStreamSpecRaw) {
text += " querying " + ((FilterStreamSpecRaw) streamRaw).RawFilterSpec.EventTypeName;
}
return text;
}
internal static bool DetermineStatelessSelect(
StatementType type,
StatementSpecRaw spec,
bool hasSubselects)
{
if (hasSubselects) {
return false;
}
if (type != StatementType.SELECT) {
return false;
}
if (spec.StreamSpecs == null || spec.StreamSpecs.Count > 1 || spec.StreamSpecs.IsEmpty()) {
return false;
}
StreamSpecRaw singleStream = spec.StreamSpecs[0];
if (!(singleStream is FilterStreamSpecRaw) && !(singleStream is NamedWindowConsumerStreamSpec)) {
return false;
}
if (singleStream.ViewSpecs != null && singleStream.ViewSpecs.Length > 0) {
return false;
}
if (spec.OutputLimitSpec != null) {
return false;
}
if (spec.MatchRecognizeSpec != null) {
return false;
}
IList<ExprNode> expressions = StatementSpecRawWalkerExpr.CollectExpressionsShallow(spec);
if (expressions.IsEmpty()) {
return true;
}
var visitor = new ExprNodeSummaryVisitor();
foreach (var expr in expressions) {
if (expr == null) {
continue;
}
expr.Accept(visitor);
}
return !visitor.HasAggregation && !visitor.HasPreviousPrior && !visitor.HasSubselect;
}
public static StreamSpecCompiledDesc Compile(
StreamSpecRaw spec,
ISet<string> eventTypeReferences,
bool isInsertInto,
bool isJoin,
bool isContextDeclaration,
bool isOnTrigger,
string optionalStreamName,
int streamNum,
StatementRawInfo statementRawInfo,
StatementCompileTimeServices services)
{
if (spec is DBStatementStreamSpec dbStatementStreamSpec) {
return new StreamSpecCompiledDesc(dbStatementStreamSpec, EmptyList<StmtClassForgeableFactory>.Instance);
}
if (spec is FilterStreamSpecRaw filterStreamSpecRaw) {
return CompileFilter(
filterStreamSpecRaw,
isInsertInto,
isJoin,
isContextDeclaration,
isOnTrigger,
optionalStreamName,
statementRawInfo,
services);
}
if (spec is PatternStreamSpecRaw patternStreamSpecRaw) {
return CompilePattern(
patternStreamSpecRaw,
eventTypeReferences,
isInsertInto,
isJoin,
isContextDeclaration,
isOnTrigger,
optionalStreamName,
streamNum,
statementRawInfo,
services);
}
if (spec is MethodStreamSpec methodStreamSpec) {
return new StreamSpecCompiledDesc(
CompileMethod(methodStreamSpec),
EmptyList<StmtClassForgeableFactory>.Instance);
}
throw new IllegalStateException("Unrecognized stream spec " + spec);
}
public static StreamSpecCompiled Compile(
StreamSpecRaw spec,
ISet<string> eventTypeReferences,
bool isInsertInto,
bool isJoin,
bool isContextDeclaration,
bool isOnTrigger,
string optionalStreamName,
int streamNum,
StatementRawInfo statementRawInfo,
StatementCompileTimeServices services)
{
if (spec is DBStatementStreamSpec) {
return (DBStatementStreamSpec) spec;
}
if (spec is FilterStreamSpecRaw) {
return CompileFilter(
(FilterStreamSpecRaw) spec,
isInsertInto,
isJoin,
isContextDeclaration,
isOnTrigger,
optionalStreamName,
statementRawInfo,
services);
}
if (spec is PatternStreamSpecRaw) {
return CompilePattern(
(PatternStreamSpecRaw) spec,
eventTypeReferences,
isInsertInto,
isJoin,
isContextDeclaration,
isOnTrigger,
optionalStreamName,
streamNum,
statementRawInfo,
services);
}
if (spec is MethodStreamSpec) {
return CompileMethod((MethodStreamSpec) spec);
}
throw new IllegalStateException("Unrecognized stream spec " + spec);
}
public DataFlowOpForgeInitializeResult InitializeForge(DataFlowOpForgeInitializeContext context)
{
if (context.InputPorts.IsEmpty()) {
throw new ArgumentException("Select operator requires at least one input stream");
}
if (context.OutputPorts.Count != 1) {
throw new ArgumentException(
"Select operator requires one output stream but produces " +
context.OutputPorts.Count +
" streams");
}
var portZero = context.OutputPorts[0];
if (portZero.OptionalDeclaredType != null && !portZero.OptionalDeclaredType.IsUnderlying) {
submitEventBean = true;
}
// determine adapter factories for each type
var numStreams = context.InputPorts.Count;
eventTypes = new EventType[numStreams];
for (var i = 0; i < numStreams; i++) {
eventTypes[i] = context.InputPorts.Get(i).TypeDesc.EventType;
}
// validate
if (select.InsertIntoDesc != null) {
throw new ExprValidationException("Insert-into clause is not supported");
}
if (select.SelectStreamSelectorEnum != SelectClauseStreamSelectorEnum.ISTREAM_ONLY) {
throw new ExprValidationException("Selecting remove-stream is not supported");
}
ExprNodeSubselectDeclaredDotVisitor visitor =
StatementSpecRawWalkerSubselectAndDeclaredDot.WalkSubselectAndDeclaredDotExpr(select);
GroupByClauseExpressions groupByExpressions = GroupByExpressionHelper.GetGroupByRollupExpressions(
select.GroupByExpressions,
select.SelectClauseSpec,
select.WhereClause,
select.OrderByList,
null);
if (!visitor.Subselects.IsEmpty()) {
throw new ExprValidationException("Subselects are not supported");
}
IDictionary<int, FilterStreamSpecRaw> streams = new Dictionary<int, FilterStreamSpecRaw>();
for (var streamNum = 0; streamNum < select.StreamSpecs.Count; streamNum++) {
StreamSpecRaw rawStreamSpec = select.StreamSpecs[streamNum];
if (!(rawStreamSpec is FilterStreamSpecRaw)) {
throw new ExprValidationException(
"From-clause must contain only streams and cannot contain patterns or other constructs");
}
streams.Put(streamNum, (FilterStreamSpecRaw) rawStreamSpec);
}
// compile offered streams
IList<StreamSpecCompiled> streamSpecCompileds = new List<StreamSpecCompiled>();
originatingStreamToViewableStream = new int[select.StreamSpecs.Count];
for (var streamNum = 0; streamNum < select.StreamSpecs.Count; streamNum++) {
var filter = streams.Get(streamNum);
var inputPort = FindInputPort(filter.RawFilterSpec.EventTypeName, context.InputPorts);
if (inputPort == null) {
throw new ExprValidationException(
"Failed to find stream '" +
filter.RawFilterSpec.EventTypeName +
"' among input ports, input ports are " +
CompatExtensions.RenderAny(GetInputPortNames(context.InputPorts)));
}
var inputPortValue = inputPort.Value;
var eventType = inputPortValue.Value.TypeDesc.EventType;
originatingStreamToViewableStream[inputPortValue.Key] = streamNum;
var streamAlias = filter.OptionalStreamName;
var filterSpecCompiled = new FilterSpecCompiled(
eventType,
streamAlias,
new IList<FilterSpecParamForge>[] {
new EmptyList<FilterSpecParamForge>()
},
null);
ViewSpec[] viewSpecs = select.StreamSpecs[streamNum].ViewSpecs;
var filterStreamSpecCompiled = new FilterStreamSpecCompiled(
filterSpecCompiled,
viewSpecs,
streamAlias,
StreamSpecOptions.DEFAULT);
streamSpecCompileds.Add(filterStreamSpecCompiled);
}
// create compiled statement spec
var selectClauseCompiled = StatementLifecycleSvcUtil.CompileSelectClause(select.SelectClauseSpec);
Attribute[] mergedAnnotations = AnnotationUtil.MergeAnnotations(
context.StatementRawInfo.Annotations,
context.OperatorAnnotations);
mergedAnnotations = AddObjectArrayRepresentation(mergedAnnotations);
var streamSpecArray = streamSpecCompileds.ToArray();
// determine if snapshot output is needed
var outputLimitSpec = select.OutputLimitSpec;
if (iterate) {
if (outputLimitSpec != null) {
throw new ExprValidationException("Output rate limiting is not supported with 'iterate'");
}
outputLimitSpec = new OutputLimitSpec(OutputLimitLimitType.SNAPSHOT, OutputLimitRateType.TERM);
select.OutputLimitSpec = outputLimitSpec;
}
// override the statement spec
var compiled = new StatementSpecCompiled(
select,
streamSpecArray,
selectClauseCompiled,
mergedAnnotations,
groupByExpressions,
new EmptyList<ExprSubselectNode>(),
new EmptyList<ExprDeclaredNode>(),
new EmptyList<ExprTableAccessNode>());
var dataflowClassPostfix = context.CodegenEnv.ClassPostfix + "__dfo" + context.OperatorNumber;
var containerStatement = context.Base.StatementSpec;
context.Base.StatementSpec = compiled;
// make forgable
var forablesResult = StmtForgeMethodSelectUtil.Make(
context.Container,
true,
context.CodegenEnv.Namespace,
dataflowClassPostfix,
context.Base,
context.Services);
// return the statement spec
context.Base.StatementSpec = containerStatement;
EventType outputEventType = forablesResult.EventType;
var initializeResult = new DataFlowOpForgeInitializeResult();
initializeResult.TypeDescriptors = new[] {new GraphTypeDesc(false, true, outputEventType)};
initializeResult.AdditionalForgables = forablesResult.ForgeResult;
foreach (StmtClassForgable forgable in forablesResult.ForgeResult.Forgables) {
if (forgable.ForgableType == StmtClassForgableType.AIFACTORYPROVIDER) {
classNameAIFactoryProvider = forgable.ClassName;
} else if (forgable.ForgableType == StmtClassForgableType.FIELDS) {
classNameFieldsFactoryProvider = forgable.ClassName;
}
}
return initializeResult;
}