Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/19714#discussion_r153428919
--- Diff: docs/sql-programming-guide.md ---
@@ -1492,6 +1492,19 @@ that these options will be deprecated in future
release as more optimizations ar
</tr>
</table>
+## Broadcast Hint for SQL Queries
--- End diff --
let's also mention the behavior change in migration guide section.
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