amorynan commented on code in PR #46639:
URL: https://github.com/apache/doris/pull/46639#discussion_r1908101640
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fe/fe-core/src/main/java/org/apache/doris/alter/SchemaChangeHandler.java:
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@@ -627,8 +627,9 @@ private boolean processModifyColumn(ModifyColumnClause
alterClause, OlapTable ol
if (!col.equals(modColumn)) {
typeChanged = true;
// TODO:the case where columnPos is not empty has not been
considered
- if (columnPos == null && col.getDataType() ==
PrimitiveType.VARCHAR
- && modColumn.getDataType() ==
PrimitiveType.VARCHAR) {
+ if (columnPos == null && ((col.getDataType() ==
PrimitiveType.VARCHAR
+ && modColumn.getDataType() ==
PrimitiveType.VARCHAR)
+ || col.getDataType().isComplexType())) {
Review Comment:
I write a isSupportSchemaChangeForCharType for this, here just a pass to
call checkSchemaChangeAllowed which can check is support or not
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