add clarifying dictionary comment

brimdata · Dec 14, 2022 · 868965f · 868965f
1 parent 54ceeba
commit 868965f
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/zio/arrowio/writer.go b/zio/arrowio/writer.go
@@ -31,7 +31,9 @@ var (
 
 // Writer is a zio.Writer for the Arrow IPC stream format.  Given Zed values
 // with appropriately named types (see the newArrowDataType implementation), it
-// can write all Arrow types except dictionaries and sparse unions.
+// can write all Arrow types except dictionaries and sparse unions.  (Although
+// dictionaries are not part of the Zed data model, write support could be added
+// using a named type.)
 type Writer struct {
 	w                io.WriteCloser
 	writer           *ipc.Writer