akashrn5 commented on a change in pull request #4129:
URL: https://github.com/apache/carbondata/pull/4129#discussion_r644733607
##########
File path:
integration/spark/src/main/scala/org/apache/spark/sql/execution/command/schema/CarbonAlterTableColRenameDataTypeChangeCommand.scala
##########
@@ -225,12 +264,46 @@ private[sql] case class
CarbonAlterTableColRenameDataTypeChangeCommand(
newColumnProperties.put(CarbonCommonConstants.COLUMN_COMMENT,
newColumnComment.get)
columnSchema.setColumnProperties(newColumnProperties)
}
- addColumnSchema = columnSchema
+ addedTableColumnSchema = columnSchema
+ } else if (isComplexChild(columnSchema)) {
+ if (alteredColumnNamesMap.contains(columnSchemaName)) {
+ // matches exactly
+ val newComplexChildName = alteredColumnNamesMap(columnSchemaName)
+ columnSchema.setColumn_name(newComplexChildName)
+ isSchemaEntryRequired = true
+ } else {
+ val alteredParent = checkIfParentIsAltered(columnSchemaName)
+ /*
+ * Lets say, if complex schema is: str struct<a: int>
+ * and if parent column is changed from str -> str2
+ * then its child name should also be changed from str.a -> str2.a
+ */
+ if (alteredParent != null) {
+ val newParent = alteredColumnNamesMap(alteredParent)
+ val newComplexChildName = newParent + columnSchemaName
+ .split(alteredParent)(1)
+ columnSchema.setColumn_name(newComplexChildName)
+ isSchemaEntryRequired = true
+ }
+ }
+ }
+ // validate duplicate child columns
+ if (uniqueColumnSet.contains(columnSchema.getColumn_name)) {
+ throw new UnsupportedOperationException("Duplicate columns are
present")
+ }
+
+ // make a new schema evolution entry after column rename or datatype
change
+ if (isSchemaEntryRequired) {
+ addedColumnsList ++= List(columnSchema)
+ deletedColumnsList ++= List(deletedColumnSchema)
timeStamp = System.currentTimeMillis()
- // make a new schema evolution entry after column rename or datatype
change
- schemaEvolutionEntry = AlterTableUtil
- .addNewSchemaEvolutionEntry(timeStamp, addColumnSchema,
deletedColumnSchema)
+ schemaEvolutionEntry =
AlterTableUtil.addNewSchemaEvolutionEntry(schemaEvolutionEntry,
+ columnSchema,
Review comment:
```suggestion
addedTableColumnSchema,
```
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