Change getJoinFunctionName to return vespalib::string instance.

1 files changed, 1 insertions, 1 deletions

diff --git a/document/src/vespa/document/update/tensormodifyupdate.cpp b/document/src/vespa/document/update/tensormodifyupdate.cpp
index 8adf2295650..8cee367cae0 100644
--- a/document/src/vespa/document/update/tensormodifyupdate.cpp
+++ b/document/src/vespa/document/update/tensormodifyupdate.cpp
@@ -50,7 +50,7 @@ getJoinFunction(TensorModifyUpdate::Operation operation)
     }
 }
 
-const char *
+vespalib::string
 getJoinFunctionName(TensorModifyUpdate::Operation operation)
 {
     using Operation = TensorModifyUpdate::Operation;