gustavodemorais commented on code in PR #27794:
URL: https://github.com/apache/flink/pull/27794#discussion_r2965109416
##########
flink-table/flink-table-planner/src/test/java/org/apache/flink/table/planner/operations/SqlMaterializedTableNodeToOperationConverterTest.java:
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@@ -596,6 +596,48 @@ void
testAlterMaterializedTableAsQueryWithConflictColumnName() {
+ "FROM `builtin`.`default`.`t3` AS
`t3`"));
}
+ @Test
+ void testAlterMaterializedTableAsQueryWithDefinedSchema() {
+ String sql =
+ "CREATE OR ALTER MATERIALIZED TABLE base_mtbl ("
+ + "`a` BIGINT NOT NULL, `b` STRING, `c` INT, `d`
STRING, `a1` BIGINT NOT NULL, `f` INT) "
+ + "AS SELECT a, b, c, d, a as `a1`, 3 as f FROM t3";
+ FullAlterMaterializedTableOperation sqlAlterMaterializedTableAsQuery =
+ (FullAlterMaterializedTableOperation) parse(sql);
+
+ assertThat(sqlAlterMaterializedTableAsQuery.getTableChanges())
+ .containsExactly(
+ // If NOT NULL defined in schema it should stay
Review Comment:
nit
```suggestion
// If NOT NULL is defined in schema, it should stay
```
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