yihua commented on code in PR #13650:
URL: https://github.com/apache/hudi/pull/13650#discussion_r2305635409
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hudi-spark-datasource/hudi-spark-common/src/main/scala/org/apache/hudi/SparkBaseIndexSupport.scala:
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@@ -173,7 +174,13 @@ abstract class SparkBaseIndexSupport(spark: SparkSession,
var recordKeyQueries: List[Expression] = List.empty
var compositeRecordKeys: List[String] = List.empty
val recordKeyOpt = getRecordKeyConfig
- val isComplexRecordKey = recordKeyOpt.map(recordKeys =>
recordKeys.length).getOrElse(0) > 1
+ val isComplexRecordKey = {
+ val fieldCount = recordKeyOpt.map(recordKeys =>
recordKeys.length).getOrElse(0)
+ // Consider as complex if:
+ // 1. Multiple fields (> 1), OR
+ // 2. Using complex key generator with single record key field
+ fieldCount > 1 ||
isComplexKeyGeneratorWithSingleRecordKeyField(metaClient.getTableConfig)
Review Comment:
This is on the reader path, so I'm thinking that maybe for tables generated
by releases with breaking change, we avoid using data skipping if the key
encoding cannot be derived?
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