be explicit about dictionary replacement

apache · Nov 27, 2019 · d1a0804 · d1a0804
1 parent 5213782
commit d1a0804
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/docs/source/format/Columnar.rst b/docs/source/format/Columnar.rst
@@ -1025,8 +1025,9 @@ In the file format, there is no requirement that dictionary keys
 should be defined in a ``DictionaryBatch`` before they are used in a
 ``RecordBatch``, as long as the keys are defined somewhere in the
 file. Further more, it is invalid to have more then one **non-delta**
-dictionary batch per dictionary ID.  Delta dictionaries are applied
-in the order they appear in the file footer.
+dictionary batch per dictionary ID (i.e. dictionary replacement is not
+supported).  Delta dictionaries are applied in the order they appear in 
+the file footer.
 
 Dictionary Messages
 -------------------