public void Apply(QueryGraph queryGraph)
{
if (_targetStreamNum == _parameterStreamNum)
{
return;
}
ExprIdentNode targetStartExpr = ExprNodeUtility.GetExprIdentNode(
_typesPerStream, _targetStreamNum, _targetStartProp);
ExprIdentNode targetEndExpr = ExprNodeUtility.GetExprIdentNode(
_typesPerStream, _targetStreamNum, _targetEndProp);
ExprIdentNode parameterStartExpr = ExprNodeUtility.GetExprIdentNode(
_typesPerStream, _parameterStreamNum, _parameterStartProp);
ExprIdentNode parameterEndExpr = ExprNodeUtility.GetExprIdentNode(
_typesPerStream, _parameterStreamNum, _parameterEndProp);
if (targetStartExpr.ExprEvaluator.ReturnType != parameterStartExpr.ExprEvaluator.ReturnType)
{
return;
}
if (_currentMethod == DatetimeMethodEnum.BEFORE)
{
// a.end < b.start
queryGraph.AddRelationalOpStrict(
_targetStreamNum, targetEndExpr,
_parameterStreamNum, parameterStartExpr,
RelationalOpEnum.LT);
}
else if (_currentMethod == DatetimeMethodEnum.AFTER)
{
// a.start > b.end
queryGraph.AddRelationalOpStrict(
_targetStreamNum, targetStartExpr,
_parameterStreamNum, parameterEndExpr,
RelationalOpEnum.GT);
}
else if (_currentMethod == DatetimeMethodEnum.COINCIDES)
{
// a.startTimestamp = b.startTimestamp and a.endTimestamp = b.endTimestamp
queryGraph.AddStrictEquals(_targetStreamNum, _targetStartProp, targetStartExpr,
_parameterStreamNum, _parameterStartProp, parameterStartExpr);
var noDuration = _parameterEndProp.Equals(_parameterStartProp) &&
_targetEndProp.Equals(_targetStartProp);
if (!noDuration)
{
ExprIdentNode leftEndExpr = ExprNodeUtility.GetExprIdentNode(
_typesPerStream, _targetStreamNum, _targetEndProp);
ExprIdentNode rightEndExpr = ExprNodeUtility.GetExprIdentNode(
_typesPerStream, _parameterStreamNum, _parameterEndProp);
queryGraph.AddStrictEquals(
_targetStreamNum, _targetEndProp, leftEndExpr, _parameterStreamNum, _parameterEndProp, rightEndExpr);
}
}
else if (_currentMethod == DatetimeMethodEnum.DURING || _currentMethod == DatetimeMethodEnum.INCLUDES)
{
// DURING: b.startTimestamp < a.startTimestamp <= a.endTimestamp < b.endTimestamp
// INCLUDES: a.startTimestamp < b.startTimestamp <= b.endTimestamp < a.endTimestamp
RelationalOpEnum relop = _currentMethod == DatetimeMethodEnum.DURING
? RelationalOpEnum.LT
: RelationalOpEnum.GT;
queryGraph.AddRelationalOpStrict(
_parameterStreamNum, parameterStartExpr,
_targetStreamNum, targetStartExpr, relop);
queryGraph.AddRelationalOpStrict(
_targetStreamNum, targetEndExpr,
_parameterStreamNum, parameterEndExpr, relop);
}
else if (_currentMethod == DatetimeMethodEnum.FINISHES || _currentMethod == DatetimeMethodEnum.FINISHEDBY)
{
// FINISHES: b.startTimestamp < a.startTimestamp and a.endTimestamp = b.endTimestamp
// FINISHEDBY: a.startTimestamp < b.startTimestamp and a.endTimestamp = b.endTimestamp
RelationalOpEnum relop = _currentMethod == DatetimeMethodEnum.FINISHES
? RelationalOpEnum.LT
: RelationalOpEnum.GT;
queryGraph.AddRelationalOpStrict(
_parameterStreamNum, parameterStartExpr,
_targetStreamNum, targetStartExpr, relop);
queryGraph.AddStrictEquals(
_targetStreamNum, _targetEndProp, targetEndExpr,
_parameterStreamNum, _parameterEndProp, parameterEndExpr);
}
else if (_currentMethod == DatetimeMethodEnum.MEETS)
{
// a.endTimestamp = b.startTimestamp
queryGraph.AddStrictEquals(_targetStreamNum, _targetEndProp, targetEndExpr,
_parameterStreamNum, _parameterStartProp, parameterStartExpr);
}
else if (_currentMethod == DatetimeMethodEnum.METBY)
{
// a.startTimestamp = b.endTimestamp
queryGraph.AddStrictEquals(_targetStreamNum, _targetStartProp, targetStartExpr,
_parameterStreamNum, _parameterEndProp, parameterEndExpr);
}
else if (_currentMethod == DatetimeMethodEnum.OVERLAPS || _currentMethod == DatetimeMethodEnum.OVERLAPPEDBY)
{
// OVERLAPS: a.startTimestamp < b.startTimestamp < a.endTimestamp < b.endTimestamp
// OVERLAPPEDBY: b.startTimestamp < a.startTimestamp < b.endTimestamp < a.endTimestamp
RelationalOpEnum relop = _currentMethod == DatetimeMethodEnum.OVERLAPS
? RelationalOpEnum.LT
: RelationalOpEnum.GT;
queryGraph.AddRelationalOpStrict(
_targetStreamNum, targetStartExpr,
_parameterStreamNum, parameterStartExpr, relop);
queryGraph.AddRelationalOpStrict(
_targetStreamNum, targetEndExpr,
_parameterStreamNum, parameterEndExpr, relop);
if (_currentMethod == DatetimeMethodEnum.OVERLAPS)
{
queryGraph.AddRelationalOpStrict(
_parameterStreamNum, parameterStartExpr,
_targetStreamNum, targetEndExpr, RelationalOpEnum.LT);
}
else
{
queryGraph.AddRelationalOpStrict(
_targetStreamNum, targetStartExpr,
_parameterStreamNum, parameterEndExpr, RelationalOpEnum.LT);
}
}
else if (_currentMethod == DatetimeMethodEnum.STARTS || _currentMethod == DatetimeMethodEnum.STARTEDBY)
{
// STARTS: a.startTimestamp = b.startTimestamp and a.endTimestamp < b.endTimestamp
// STARTEDBY: a.startTimestamp = b.startTimestamp and b.endTimestamp < a.endTimestamp
queryGraph.AddStrictEquals(_targetStreamNum, _targetStartProp, targetStartExpr,
_parameterStreamNum, _parameterStartProp, parameterStartExpr);
RelationalOpEnum relop = _currentMethod == DatetimeMethodEnum.STARTS
? RelationalOpEnum.LT
: RelationalOpEnum.GT;
queryGraph.AddRelationalOpStrict(
_targetStreamNum, targetEndExpr,
_parameterStreamNum, parameterEndExpr, relop);
}
}