ahmedabu98 commented on code in PR #26873:
URL: https://github.com/apache/beam/pull/26873#discussion_r1207196178
##########
sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/BigQueryUtils.java:
##########
@@ -694,7 +694,16 @@ public static Row toBeamRow(Schema rowSchema, TableSchema
bqSchema, TableRow jso
if (jsonBQValue instanceof List) {
return ((List<Object>) jsonBQValue)
.stream()
- .map(v -> ((Map<String, Object>) v).get("v"))
+ .map(
+ v -> {
+ if (v instanceof Map) {
+ Map<String, Object> m = (Map<String, Object>) v;
+ if (m.size() == 1 && m.containsKey("v")) {
+ return m.get("v");
+ }
+ }
+ return v;
+ })
Review Comment:
Users can set this option to get results without flattening:
https://github.com/apache/beam/blob/6865eefac5633198c71fd1ec75b514e8a390d002/sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/BigQueryIO.java#L823
A test for List<Map<>> should be added at some point, but let's not block
this PR for that
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