Abacn commented on code in PR #25410:
URL: https://github.com/apache/beam/pull/25410#discussion_r1102958623


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sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/BatchLoads.java:
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@@ -471,7 +495,7 @@ public WriteResult 
expandUntriggered(PCollection<KV<DestinationT, ElementT>> inp
         writeSinglePartition(partitions.get(singlePartitionTag), 
loadJobIdPrefixView);
 
     List<PCollectionView<?>> sideInputsForUpdateSchema =
-        Lists.newArrayList(tempLoadJobIdPrefixView);
+        Lists.newArrayList(zeroLoadJobIdPrefixView);
     sideInputsForUpdateSchema.addAll(dynamicDestinations.getSideInputs());
 
     PCollection<TableDestination> successfulMultiPartitionWrites =

Review Comment:
   after leaving that comment I find using a gbk may break the use case when 
the final destination table gets updated more than once, e.g. in streaming file 
load. Of course careful windowing we can avoid it, however I did not look deep 
into it at this moment. So far I leave the overall structure of the pipeline 
unchanged.



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