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…25935) Co-authored-by: Dawid Wysakowicz <[email protected]>
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...nner/src/test/java/org/apache/flink/table/planner/runtime/stream/sql/WatermarkITCase.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package org.apache.flink.table.planner.runtime.stream.sql; | ||
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|
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| import org.apache.flink.configuration.CoreOptions; | ||
| import org.apache.flink.table.data.TimestampData; | ||
| import org.apache.flink.table.planner.factories.TestValuesTableFactory; | ||
| import org.apache.flink.table.planner.runtime.utils.StreamingTestBase; | ||
| import org.apache.flink.types.Row; | ||
| import org.apache.flink.util.CollectionUtil; | ||
|
|
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| import org.junit.jupiter.api.Test; | ||
|
|
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| import java.time.LocalDateTime; | ||
| import java.util.Arrays; | ||
| import java.util.List; | ||
| import java.util.stream.Collectors; | ||
|
|
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| import static org.assertj.core.api.Assertions.assertThat; | ||
|
|
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| /** IT tests for verifying watermarks behaviour. */ | ||
| class WatermarkITCase extends StreamingTestBase { | ||
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| @Test | ||
| void testWatermarkNotMovingBack() { | ||
| List<Row> data = | ||
| Arrays.asList( | ||
| Row.of(1, LocalDateTime.parse("2024-01-01T00:00:00")), | ||
| Row.of(3, LocalDateTime.parse("2024-01-03T00:00:00")), | ||
| Row.of(2, LocalDateTime.parse("2024-01-02T00:00:00"))); | ||
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| String dataId = TestValuesTableFactory.registerData(data); | ||
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| final String ddl = | ||
| String.format( | ||
| "CREATE Table VirtualTable (\n" | ||
| + " a INT,\n" | ||
| + " c TIMESTAMP(3),\n" | ||
| + " WATERMARK FOR c as c\n" | ||
| + ") with (\n" | ||
| + " 'connector' = 'values',\n" | ||
| + " 'bounded' = 'false',\n" | ||
| + " 'scan.watermark.emit.strategy' = 'on-periodic',\n" | ||
| + " 'enable-watermark-push-down' = 'true',\n" | ||
| + " 'disable-lookup' = 'true',\n" | ||
| + " 'data-id' = '%s'\n" | ||
| + ")\n", | ||
| dataId); | ||
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| tEnv().executeSql(ddl); | ||
| tEnv().getConfig().set(CoreOptions.DEFAULT_PARALLELISM, 1); | ||
| String query = "SELECT a, c, current_watermark(c) FROM VirtualTable order by c"; | ||
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| final List<Row> result = CollectionUtil.iteratorToList(tEnv().executeSql(query).collect()); | ||
| final List<String> actualWatermarks = | ||
| TestValuesTableFactory.getWatermarkOutput("VirtualTable").stream() | ||
| .map( | ||
| x -> | ||
| TimestampData.fromEpochMillis(x.getTimestamp()) | ||
| .toLocalDateTime() | ||
| .toString()) | ||
| .collect(Collectors.toList()); | ||
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| // Underneath, we use FromElementSourceFunctionWithWatermark which is a SourceFunction. | ||
| // SourceFunction does not support watermark moving back. SourceStreamTask does not support | ||
| // WatermarkGenerator natively. The test implementation calls | ||
| // WatermarkGenerator#onPeriodicEmit | ||
| // after each record, which makes the test deterministic. | ||
| // Additionally, the GeneratedWatermarkGeneratorSupplier does not deduplicate already | ||
| // emitted | ||
| // watermarks. This is usually handled by the target WatermarkOutput. In this test, we do | ||
| // not deduplicate watermarks because we use TestValuesWatermarkOutput. | ||
| // Given the fact watermarks are generated after every record and we don't deduplicate them, | ||
| // we have "2024-01-03T00:00" twice in the expected watermarks. | ||
| assertThat(actualWatermarks) | ||
| .containsExactly("2024-01-01T00:00", "2024-01-03T00:00", "2024-01-03T00:00"); | ||
| assertThat(result) | ||
| .containsExactly( | ||
| Row.of( | ||
| 1, | ||
| LocalDateTime.parse("2024-01-01T00:00"), | ||
| LocalDateTime.parse("2024-01-01T00:00")), | ||
| Row.of( | ||
| 2, | ||
| LocalDateTime.parse("2024-01-02T00:00"), | ||
| LocalDateTime.parse("2024-01-03T00:00")), | ||
| Row.of( | ||
| 3, | ||
| LocalDateTime.parse("2024-01-03T00:00"), | ||
| LocalDateTime.parse("2024-01-03T00:00"))); | ||
| } | ||
| } |
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