multiFK2

common/proto/table_script.proto

@@ -181,6 +181,16 @@ message ScriptDependency {
   string operation = 4;
   // Relationship table used to match the owner row to the related collection.
   string via_table = 5;
+  // Column of the current row holding the referenced row's id: the link this
+  // dependency travels, resolved when the script was saved. Empty when no link
+  // is travelled -- a self-reference, or an aggregate, which follows a path
+  // instead. A table may link to one target several times, so this is the only
+  // thing that says which link was meant; never derive it from target_table.
+  string link_column = 6;
+  // The first argument exactly as the script wrote it: a link alias, or the
+  // target table's name where one link makes that unambiguous. The Steel
+  // runtime looks its inputs up by this text.
+  string name_in_script = 7;
 }
 
 // Identifies the active form row whose external Steel inputs must be hydrated.