SERVER-46708 Support let variables in update command

1 files changed, 11 insertions, 0 deletions

diff --git a/src/mongo/db/ops/update_request.h b/src/mongo/db/ops/update_request.h
index 5570f544c3e..6404b5dcd70 100644
--- a/src/mongo/db/ops/update_request.h
+++ b/src/mongo/db/ops/update_request.h
@@ -129,6 +129,14 @@ public:
         return _runtimeConstants;
     }
 
+    void setLetParameters(const boost::optional<BSONObj>& letParameters) {
+        _letParameters = letParameters;
+    }
+
+    const boost::optional<BSONObj>& getLetParameters() const {
+        return _letParameters;
+    }
+
     void setArrayFilters(const std::vector<BSONObj>& arrayFilters) {
         _updateOp.setArrayFilters(arrayFilters);
     }
@@ -287,6 +295,9 @@ private:
     // System-defined constant values which may be required by the query or update operation.
     boost::optional<RuntimeConstants> _runtimeConstants;
 
+    // User-defined constant values to be used with a pipeline-style update. These can be specified
+    // by the user for each individual element of the 'updates' array in the 'update' command.
+    boost::optional<BSONObj> _letParameters;
 
     // The statement id of this request.
     StmtId _stmtId = kUninitializedStmtId;