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| author | Rui Liu <lriuui0x0@gmail.com> | 2023-10-11 15:25:59 +0000 |
|---|---|---|
| committer | Evergreen Agent <no-reply@evergreen.mongodb.com> | 2023-10-12 13:54:47 +0000 |
| commit | ddb1e08429308c559e4d4fccfc5d7690292bbf7a (patch) | |
| tree | 07adbb737dc3bd70ebbf0a7ba34e070d6b4642f4 | |
| parent | 508ed295612caf220eb7db8a8d0e5a6629044b02 (diff) | |
SERVER-82070 Return default value for $stdDevSamp with empty windowr5.0.22-rc0
(cherry picked from commit 075e35514569813fad6dfafb0554781cfd109959)
| -rw-r--r-- | src/mongo/db/pipeline/window_function/window_function_stddev.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mongo/db/pipeline/window_function/window_function_stddev.h b/src/mongo/db/pipeline/window_function/window_function_stddev.h index 5b4aa45b075..14aa1fa1260 100644 --- a/src/mongo/db/pipeline/window_function/window_function_stddev.h +++ b/src/mongo/db/pipeline/window_function/window_function_stddev.h @@ -63,7 +63,7 @@ public: if (_nonfiniteValueCount > 0) return Value(BSONNULL); const long long adjustedCount = _isSamp ? _count - 1 : _count; - if (adjustedCount == 0) + if (adjustedCount <= 0) return getDefault(); double squaredDifferences = _m2->getValue(false).coerceToDouble(); if (squaredDifferences < 0 || (!_isSamp && _count == 1)) { |