ahmedabu98 commented on code in PR #26873:
URL: https://github.com/apache/beam/pull/26873#discussion_r1204630625
##########
sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/BigQueryUtils.java:
##########
@@ -694,7 +694,7 @@ 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 -> v instanceof Map ? ((Map<String, Object>) v).get("v")
: v)
Review Comment:
Let's also check that the fieldType.getCollectionElementType() isn't a Map.
ie. we should also skip the `get("v")"` operation if the user is converting
a TableRow value to a List<Maps<X, Y>>.
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