danny0405 commented on code in PR #7998:
URL: https://github.com/apache/hudi/pull/7998#discussion_r1150039506
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hudi-spark-datasource/hudi-spark-common/src/main/scala/org/apache/hudi/HoodieSparkSqlWriter.scala:
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@@ -1063,7 +1063,9 @@ object HoodieSparkSqlWriter {
val recordType = config.getRecordMerger.getRecordType
val shouldCombine = parameters(INSERT_DROP_DUPS.key()).toBoolean ||
- operation.equals(WriteOperationType.UPSERT) ||
+ (operation.equals(WriteOperationType.UPSERT) &&
+ parameters.getOrElse(HoodieWriteConfig.COMBINE_BEFORE_UPSERT.key(),
+ HoodieWriteConfig.COMBINE_BEFORE_UPSERT.defaultValue()).toBoolean) ||
Review Comment:
Yeah, we uniqueness can be assured by the upstream data source, then the
user should use the insert operation instead of the upsert operation right? It
is risky to loosen the restriction if there are no good knowledge for user to
learn about these details.
We can loosen the restriction if we have a good way to tell user there is
risky for data duplications.
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