akkio-97 commented on a change in pull request #4115:
URL: https://github.com/apache/carbondata/pull/4115#discussion_r613397041
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File path:
integration/spark/src/main/scala/org/apache/spark/sql/execution/command/schema/CarbonAlterTableAddColumnCommand.scala
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@@ -85,6 +85,8 @@ private[sql] case class CarbonAlterTableAddColumnCommand(
timeStamp = System.currentTimeMillis
val schemaEvolutionEntry = new
org.apache.carbondata.core.metadata.schema.SchemaEvolutionEntry
schemaEvolutionEntry.setTimeStamp(timeStamp)
+ // filter out complex children columns
+ newCols = newCols.filter(x => !x.isComplexColumn)
schemaEvolutionEntry.setAdded(newCols.toList.asJava)
Review comment:
We only maintain number of children in each parent schema. Each column
schema is independent, hence it is a flat structure.
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