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MCOL-1793 Window functions return garbage if current row outside of window frame.

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This commit is contained in:
David Hall
2018-11-06 10:11:45 -06:00
parent 826fdc82d5
commit d01fe36fdc
3 changed files with 14 additions and 5 deletions
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7
utils/windowfunction/wf_udaf.cpp
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@ -481,6 +481,7 @@ bool WF_udaf::dropValues(int64_t b, int64_t e)
}
}
WindowFunctionType::resetData();
return true;
}
@ -708,6 +709,12 @@ void WF_udaf::operator()(int64_t b, int64_t e, int64_t c)
uint64_t colOut = fFieldIndex[0];
bool isNull = false;
// Initialize result to NULL. If no values are found, NULL is the result.
// if (getContext().getRunFlag(mcsv1sdk::UDAF_DEFAULT_NULL))
// {
// getNullValueAny(fValOut, getContext().getResultType(), getContext().getColWidth());
// }
if ((fFrameUnit == WF__FRAME_ROWS) ||
(fPrev == -1) ||
(!fPeer->operator()(getPointer(fRowData->at(c)), getPointer(fRowData->at(fPrev)))))

10
utils/windowfunction/windowfunction.cpp
View File

@ -188,7 +188,7 @@ void WindowFunction::operator()()
}
// If b > e then the frame is entirely outside of the partition
// and there's no values to add
// and there's no values to drop
if (b <= e)
{
// UDAnF functions may have a dropValue function implemented.
@ -207,15 +207,15 @@ void WindowFunction::operator()()
}
else
{
// dropValues failed so do the entire frame.
// dropValues failed or doesn't exist
// so do the entire frame.
fFunctionType->resetData();
}
}
fFunctionType->operator()(b, e, i); // Calls nextValue
}
prevFrame = w;
fFunctionType->operator()(b, e, i); // UDAnF: Calls nextValue and evaluate
firstTime = false;
prevFrame = w;
}
}
}