mapleFU commented on code in PR #35628:
URL: https://github.com/apache/arrow/pull/35628#discussion_r1245407884
##########
docs/source/format/Columnar.rst:
##########
@@ -350,6 +352,51 @@ will be represented as follows: ::
|----------------|----------------------|
| joemark | unspecified |
+Variable-size Binary View Layout
+--------------------------------
+
+Each value in this layout consists of 0 or more bytes. These characters'
+locations are indicated using a **views** buffer, which may point to one
+of potentially several **data** buffers or may contain the characters
+inline.
+
+The views buffer contains `length` view structures with the following layout:
+
+::
+
+ * Short strings, length <= 12
+ | Bytes 0-3 | Bytes 4-15 |
+ |------------|---------------------------------------|
+ | length | data (padded with 0) |
+
+ * Long strings, length > 12
+ | Bytes 0-3 | Bytes 4-7 | Bytes 8-11 | Bytes 12-15 |
+ |------------|------------|------------|-------------|
+ | length | prefix | buf. index | offset |
+
+In both the long and short string cases, the first four bytes encode the
Review Comment:
Hi, I've a question about this format.
For StructArray[1] or FixedListArray[2], when parent is not valid, the
correspond child leaves "undefined". When a child validity is valid, would it
point to a undefined address?
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