@Test
    public void testBuildDropColumnStatement() {
        for (Entry<Integer, Column> kv : allTypes2Columns.entrySet()) {
            Assert.assertEquals("DROP COLUMN `c`",
                    helper.buildDropColumnStatement(Collections.singletonList(
                            new AlterColumn(AlterType.DROP_COLUMN, null, kv.getValue()))));
        }

    }
Test for {@link OperationHelper#buildDropColumnStatement(List)}
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/doris/src/test/java/org/apache/inlong/sort/doris/schema/OperationHelperTest.java