Github user sansanichfb commented on a diff in the pull request:
https://github.com/apache/incubator-hawq-docs/pull/126#discussion_r124423088
--- Diff: markdown/pxf/HivePXF.html.md.erb ---
@@ -495,9 +500,16 @@ Use the `HiveORC` profile to access ORC format data.
The `HiveORC` profile provi
- `=`, `>`, `<`, `>=`, `<=`, `IS NULL`, and `IS NOT NULL` operators
and comparisons between the `float8` and `float4` types
- `IN` operator on arrays of `int2`, `int4`, `int8`, `boolean`, and
`text`
-- Complex type support - You can access Hive tables composed of array,
map, struct, and union data types. PXF serializes each of these complex types
to `text`.
+When choosing an ORC-supporting profile, consider the following:
+
+- The `HiveORC` profile supports complex types. You can access Hive tables
composed of array, map, struct, and union data types. PXF serializes each of
these complex types to `text`.
+
+ The `HiveVectorizedORC` profile does not support complex types.
+
+- The `HiveVectorizedORC` profile reads 1024 rows of data, while the
`HiveORC` profile reads only a single row at a time.
--- End diff --
profile reads 1024 rows of data at once
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