pitrou commented on code in PR #38385:
URL: https://github.com/apache/arrow/pull/38385#discussion_r1387737223


##########
docs/source/format/FlightSql.rst:
##########
@@ -149,6 +149,12 @@ the ``type`` should be ``ClosePreparedStatement``).
     When used with DoPut: execute the query and return the number of
     affected rows.
 
+``CommandStatementIngest``
+    Execute a bulk ingestion.
+
+    When used with DoPut: load the stream of Arrow record batches into
+    the specified target table and return the number of rows ingested.

Review Comment:
   The Flight SQL spec should explain how the caller can retrieve the number of 
rows ingested. Apparently it's encoded in the `app_metadata`? Is it using 
protobuf? JSON?



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