1 files changed, 19 insertions, 0 deletions
diff --git a/src/mongo/db/catalog/index_key_validate.h b/src/mongo/db/catalog/index_key_validate.h
index 3b2105bdd5c..bb2cc7ff123 100644
--- a/src/mongo/db/catalog/index_key_validate.h
+++ b/src/mongo/db/catalog/index_key_validate.h
@@ -33,11 +33,14 @@
 
 namespace mongo {
 class BSONObj;
+class CollatorInterface;
 class NamespaceString;
 class Status;
 template <typename T>
 class StatusWith;
 
+namespace index_key_validate {
+
 /**
  * Checks if the key is valid for building an index according to the validation rules for the given
  * index version.
@@ -55,9 +58,25 @@ StatusWith<BSONObj> validateIndexSpec(
     const ServerGlobalParams::FeatureCompatibility& featureCompatibility);
 
 /**
+ * Performs additional validation for _id index specifications. This should be called after
+ * validateIndexSpec().
+ */
+Status validateIdIndexSpec(const BSONObj& indexSpec);
+
+/**
  * Confirms that 'indexSpec' contains only valid field names. Returns an error if an unexpected
  * field name is found.
  */
 Status validateIndexSpecFieldNames(const BSONObj& indexSpec);
 
+/**
+ * Validates the 'collation' field in the index specification 'indexSpec' and fills in the full
+ * collation spec. If 'collation' is missing, fills it in with the spec for 'defaultCollator'.
+ * Returns the index specification with 'collation' filled in.
+ */
+StatusWith<BSONObj> validateIndexSpecCollation(OperationContext* txn,
+                                               const BSONObj& indexSpec,
+                                               const CollatorInterface* defaultCollator);
+
+}  // namespace index_key_validate
 }  // namespace mongo