jackylk commented on a change in pull request #3509: [CARBONDATA-3618] Update
query should throw exception if key has more than one value
URL: https://github.com/apache/carbondata/pull/3509#discussion_r361771360
##########
File path:
integration/spark2/src/main/scala/org/apache/spark/sql/execution/command/mutation/CarbonProjectForUpdateCommand.scala
##########
@@ -135,7 +136,24 @@ private[sql] case class CarbonProjectForUpdateCommand(
else {
Dataset.ofRows(sparkSession, plan)
}
-
+ if (CarbonProperties.getValidateUpdateKeyValueMapping) {
+ // If more than one value present for the update key, should fail
the update
+ val ds =
dataSet.select(CarbonCommonConstants.CARBON_IMPLICIT_COLUMN_TUPLEID)
+ .groupBy(CarbonCommonConstants.CARBON_IMPLICIT_COLUMN_TUPLEID)
+ .count()
+ .select("count")
+ .filter(col("count") > lit(1))
+ .limit(1)
+ .collect()
Review comment:
@zzcclp @ajantha-bhat One suggestion is to try to move this check to the
join subquery in the update operation itself, then we do not need to do this
check separately.
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