Shengkai Fang created FLINK-20272:
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Summary: Wrong result of Rank Function
Key: FLINK-20272
URL:
https://issues.apache.org/jira/browse/FLINK-20272 Project: Flink
Issue Type: Bug
Components: Table SQL / Planner
Affects Versions: 1.11.0, 1.12.0
Reporter: Shengkai Fang
Add the following test in the {{RetractableTopNFunctionTest}}.
{code:java}
@Test
public void testCornerCase2() throws Exception {
AbstractTopNFunction func = createFunction(RankType.ROW_NUMBER, new ConstantRankRange(1, 2), false,
false);
OneInputStreamOperatorTestHarness<RowData, RowData> testHarness = createTestHarness(func);
testHarness.open();
testHarness.processElement(insertRecord("a", 1L, 1));
testHarness.processElement(insertRecord("a", 2L, 2));
testHarness.processElement(insertRecord("a", 3L, 2));
testHarness.processElement(insertRecord("a", 4L, 4));
testHarness.processElement(insertRecord("a", 5L, 4));
testHarness.processElement(deleteRecord("a", 4L, 4));
testHarness.processElement(deleteRecord("a", 1L, 1));
testHarness.processElement(deleteRecord("a", 2L, 2));
testHarness.close();
List<Object> expectedOutput = new ArrayList<>();
expectedOutput.add(insertRecord("a", 1L, 1));
expectedOutput.add(insertRecord("a", 2L, 2));
expectedOutput.add(deleteRecord("a", 1L, 1));
expectedOutput.add(insertRecord("a", 3L, 2));
expectedOutput.add(deleteRecord("a", 2L, 2));
expectedOutput.add(insertRecord("a", 5L, 4));
assertorWithRowNumber.assertOutputEquals("output wrong.", expectedOutput, testHarness.getOutput());
}
{code}
When the operator gets delete message, it will only delete the record whose current rank is in the range. If we keep deleting the message in the range, the operator will send the undeleted message to the sink.
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