diff options
Diffstat (limited to 'src/mongo/db/ops/modifier_compare.cpp')
| -rw-r--r-- | src/mongo/db/ops/modifier_compare.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/mongo/db/ops/modifier_compare.cpp b/src/mongo/db/ops/modifier_compare.cpp index 2c9a48ac238..3be7c669428 100644 --- a/src/mongo/db/ops/modifier_compare.cpp +++ b/src/mongo/db/ops/modifier_compare.cpp @@ -107,6 +107,8 @@ Status ModifierCompare::prepare(mutablebson::Element root, // be created during the apply. Status status = pathsupport::findLongestPrefix( _updatePath, root, &_preparedState->idxFound, &_preparedState->elemFound); + const auto elemFoundIsArray = + _preparedState->elemFound.ok() && _preparedState->elemFound.getType() == BSONType::Array; // FindLongestPrefix may say the path does not exist at all, which is fine here, or // that the path was not viable or otherwise wrong, in which case, the mod cannot @@ -125,6 +127,11 @@ Status ModifierCompare::prepare(mutablebson::Element root, _preparedState->idxFound == (_updatePath.numParts() - 1)); if (!destExists) { execInfo->noOp = false; + + if (elemFoundIsArray) { + // Report that an existing array will gain a new element as a result of this mod. + execInfo->indexOfArrayWithNewElement[0] = _preparedState->idxFound; + } } else { const int compareVal = _preparedState->elemFound.compareWithBSONElement(_val, false); execInfo->noOp = (compareVal == 0) || |