1 files changed, 12 insertions, 0 deletions
diff --git a/src/mongo/s/cluster_commands_helpers.h b/src/mongo/s/cluster_commands_helpers.h
index 096a04019e1..b66f3a2f95f 100644
--- a/src/mongo/s/cluster_commands_helpers.h
+++ b/src/mongo/s/cluster_commands_helpers.h
@@ -65,6 +65,18 @@ void appendWriteConcernErrorToCmdResponse(const ShardId& shardID,
 std::unique_ptr<WriteConcernErrorDetail> getWriteConcernErrorDetailFromBSONObj(const BSONObj& obj);
 
 /**
+ * Makes an expression context suitable for canonicalization of queries that contain let parameters
+ * and runtimeConstants on mongos.
+ */
+boost::intrusive_ptr<ExpressionContext> makeExpressionContextWithDefaultsForTargeter(
+    OperationContext* opCtx,
+    const NamespaceString& nss,
+    const BSONObj& collation,
+    const boost::optional<ExplainOptions::Verbosity>& verbosity,
+    const boost::optional<BSONObj>& letParameters,
+    const boost::optional<RuntimeConstants>& runtimeConstants);
+
+/**
  * Consults the routing info to build requests for:
  * 1. If sharded, shards that own chunks for the namespace, or
  * 2. If unsharded, the primary shard for the database.