fsk119 commented on code in PR #21577:
URL: https://github.com/apache/flink/pull/21577#discussion_r1060260536
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flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/operations/AlterSchemaConverter.java:
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@@ -698,7 +782,7 @@ private AlterSchemaStrategy
computeAlterSchemaStrategy(SqlAlterTableSchema alter
alterTableSchema.getClass().getCanonicalName()));
}
- private static <T> T unwrap(Optional<T> value) {
+ private <T> T unwrap(Optional<T> value) {
Review Comment:
ModifySchemaConverter and AddSchemaConverter are both static classes and can
only use static methods in the parent class. But now I change them to
class-level inner class, so I think we can remove the static keyword now.
BTW, I think we should narrow the scope of the visibility. With the `static`
keyword, the visibility is much larger. WDYT?
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