robertwb commented on code in PR #32586:
URL: https://github.com/apache/beam/pull/32586#discussion_r1779292875


##########
sdks/java/io/json/src/main/java/org/apache/beam/sdk/io/json/providers/JsonWriteTransformProvider.java:
##########
@@ -121,8 +122,13 @@ protected static class JsonWriteTransform extends 
SchemaTransform {
 
     @Override
     public PCollectionRowTuple expand(PCollectionRowTuple input) {
-      WriteFilesResult<?> result =
-          
input.get(INPUT_ROWS_TAG).apply(JsonIO.writeRows(configuration.getPath()).withSuffix(""));
+      // Preserve input windowing
+      JsonIO.Write<Row> writeTransform = 
JsonIO.writeRows(configuration.getPath()).withSuffix("");
+      if (input.get(INPUT_ROWS_TAG).isBounded() == 
PCollection.IsBounded.UNBOUNDED) {

Review Comment:
   Same.



##########
sdks/java/io/csv/src/main/java/org/apache/beam/sdk/io/csv/providers/CsvWriteTransformProvider.java:
##########
@@ -134,10 +135,15 @@ public PCollectionRowTuple expand(PCollectionRowTuple 
input) {
       if (configuration.getDelimiter() != null) {
         format = format.withDelimiter(configuration.getDelimiter().charAt(0));
       }
-      WriteFilesResult<?> result =
-          input
-              .get(INPUT_ROWS_TAG)
-              .apply(CsvIO.writeRows(configuration.getPath(), 
format).withSuffix(""));
+
+      // Preserve input windowing
+      CsvIO.Write<Row> writeTransform =
+          CsvIO.writeRows(configuration.getPath(), format).withSuffix("");
+      if (input.get(INPUT_ROWS_TAG).isBounded() == 
PCollection.IsBounded.UNBOUNDED) {

Review Comment:
   This should probably be a function of the windowing (not being global), not 
of its boundedness. 



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