danielxjd commented on a change in pull request #12786:
URL: https://github.com/apache/beam/pull/12786#discussion_r485887994
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File path:
sdks/java/io/parquet/src/main/java/org/apache/beam/sdk/io/parquet/ParquetIO.java
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@@ -135,6 +135,20 @@
* ...
* }</pre>
*
+ * <p>Reading with projection can be enabled with the projection schema as
following. Splittable
+ * reading is enabled when reading with projection. The projection_schema
contains only the column
+ * that we would like to read and encoder_schema contains the schema to encode
the output with the
+ * unwanted columns changed to nullable. Partial reading provide increase of
reading time due to
Review comment:
should be decrease
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