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-rw-r--r--src/mongo/db/pipeline/expression.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/mongo/db/pipeline/expression.h b/src/mongo/db/pipeline/expression.h
index a9eb4835a62..62bf6904fc5 100644
--- a/src/mongo/db/pipeline/expression.h
+++ b/src/mongo/db/pipeline/expression.h
@@ -769,6 +769,10 @@ public:
return _fieldPath;
}
+ Variables::Id getVariableId() const {
+ return _variable;
+ }
+
private:
ExpressionFieldPath(const boost::intrusive_ptr<ExpressionContext>& expCtx,
const std::string& fieldPath,