Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/3820#discussion_r23207993
--- Diff: docs/sql-programming-guide.md ---
@@ -581,6 +581,15 @@ Configuration of Parquet can be done using the
`setConf` method on SQLContext or
</td>
</tr>
<tr>
+ <td><code>spark.sql.parquet.int96AsTimestamp</code></td>
+ <td>true</td>
+ <td>
+ Some Parquet-producing systems, in particular Impala, store Timestamp
into INT96. Spark would also
+ store Timestamp as INT96 because we need to avoid precision lost of
the nanoseconds field. This
+ flag tells Spark SQL to interpret INT96 data as a timestamp to provide
compatibility with these systems.
+ </td>
+</tr>
--- End diff --
I'm probably OK with this property. Just wanna ask doesn't Impala store
original type information (TIMESTAMP) together in Parquet metainfo?
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