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[flink] Add base support of computed column for CDC (#1109)
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108 changes: 108 additions & 0 deletions
108
paimon-e2e-tests/src/test/java/org/apache/paimon/tests/cdc/MySqlComputedColumnE2ETest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package org.apache.paimon.tests.cdc; | ||
|
|
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| import org.apache.paimon.flink.action.cdc.mysql.MySqlContainer; | ||
| import org.apache.paimon.flink.action.cdc.mysql.MySqlVersion; | ||
|
|
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| import org.junit.jupiter.api.Disabled; | ||
| import org.junit.jupiter.api.Test; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
| import org.testcontainers.containers.Container; | ||
|
|
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| import java.sql.Connection; | ||
| import java.sql.Statement; | ||
|
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| /** E2e test for MySql CDC with computed column. */ | ||
| public class MySqlComputedColumnE2ETest extends MySqlCdcE2eTestBase { | ||
|
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| private static final Logger LOG = LoggerFactory.getLogger(MySqlComputedColumnE2ETest.class); | ||
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| protected MySqlComputedColumnE2ETest() { | ||
| super(MySqlVersion.V5_7); | ||
| } | ||
|
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| @Test | ||
| public void testSyncTable() throws Exception { | ||
| String runActionCommand = | ||
| String.join( | ||
| " ", | ||
| "bin/flink", | ||
| "run", | ||
| "-c", | ||
| "org.apache.paimon.flink.action.FlinkActions", | ||
| "-D", | ||
| "execution.checkpointing.interval=1s", | ||
| "--detached", | ||
| "lib/paimon-flink.jar", | ||
| "mysql-sync-table", | ||
| "--warehouse", | ||
| warehousePath, | ||
| "--database", | ||
| "default", | ||
| "--table", | ||
| "ts_table", | ||
| "--partition-keys", | ||
| // computed from _datetime | ||
| "_year", | ||
| "--primary-keys", | ||
| "pk,_year", | ||
| "--computed-column '_year=year(_datetime)'", | ||
| "--mysql-conf", | ||
| "hostname=mysql-1", | ||
| "--mysql-conf", | ||
| String.format("port=%d", MySqlContainer.MYSQL_PORT), | ||
| "--mysql-conf", | ||
| String.format("username='%s'", mySqlContainer.getUsername()), | ||
| "--mysql-conf", | ||
| String.format("password='%s'", mySqlContainer.getPassword()), | ||
| "--mysql-conf", | ||
| "database-name='test_computed_column'", | ||
| "--mysql-conf", | ||
| "table-name='T'", | ||
| "--table-conf", | ||
| "bucket=2"); | ||
| Container.ExecResult execResult = | ||
| jobManager.execInContainer("su", "flink", "-c", runActionCommand); | ||
| LOG.info(execResult.getStdout()); | ||
| LOG.info(execResult.getStderr()); | ||
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| try (Connection conn = getMySqlConnection(); | ||
| Statement statement = conn.createStatement()) { | ||
| statement.executeUpdate("USE test_computed_column"); | ||
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| statement.executeUpdate("INSERT INTO T VALUES (1, '2023-05-10 12:30:20')"); | ||
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| String jobId = | ||
| runSql( | ||
| "INSERT INTO result1 SELECT * FROM ts_table;", | ||
| catalogDdl, | ||
| useCatalogCmd, | ||
| createResultSink("result1", "pk INT, _date TIMESTAMP(0), _year INT")); | ||
| checkResult("1, 2023-05-10T12:30:20, 2023"); | ||
| clearCurrentResults(); | ||
| cancelJob(jobId); | ||
| } | ||
| } | ||
|
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||
| @Disabled("Not supported") | ||
| @Test | ||
| public void testSyncDatabase() {} | ||
| } |
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63 changes: 63 additions & 0 deletions
63
...n-flink-common/src/main/java/org/apache/paimon/flink/action/cdc/mysql/ComputedColumn.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package org.apache.paimon.flink.action.cdc.mysql; | ||
|
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| import org.apache.paimon.types.DataType; | ||
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| import javax.annotation.Nullable; | ||
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| import java.io.Serializable; | ||
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| /** | ||
| * A Computed column's value is computed from input columns. Only expression with at most two inputs | ||
| * (with referenced field at the first) is supported currently. | ||
| */ | ||
| public class ComputedColumn implements Serializable { | ||
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| private static final long serialVersionUID = 1L; | ||
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| private final String columnName; | ||
| private final Expression expression; | ||
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| public ComputedColumn(String columnName, Expression expression) { | ||
| this.columnName = columnName; | ||
| this.expression = expression; | ||
| } | ||
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| public String columnName() { | ||
| return columnName; | ||
| } | ||
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| public DataType columnType() { | ||
| return expression.outputType(); | ||
| } | ||
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| String fieldReference() { | ||
| return expression.fieldReference(); | ||
| } | ||
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| /** Compute column's value from given argument. Return null if input is null. */ | ||
| @Nullable | ||
| String eval(@Nullable String input) { | ||
| if (input == null) { | ||
| return null; | ||
| } | ||
| return expression.eval(input); | ||
| } | ||
| } |
91 changes: 91 additions & 0 deletions
91
...aimon-flink-common/src/main/java/org/apache/paimon/flink/action/cdc/mysql/Expression.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package org.apache.paimon.flink.action.cdc.mysql; | ||
|
|
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| import org.apache.paimon.types.DataType; | ||
| import org.apache.paimon.types.DataTypes; | ||
| import org.apache.paimon.utils.DateTimeUtils; | ||
|
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| import javax.annotation.Nullable; | ||
|
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| import java.io.Serializable; | ||
| import java.time.LocalDateTime; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
|
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| /** Produce a computation result for computed column. */ | ||
| public interface Expression extends Serializable { | ||
|
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| List<String> SUPPORTED_EXPRESSION = Collections.singletonList("year"); | ||
|
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| /** Return name of referenced field. */ | ||
| String fieldReference(); | ||
|
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| /** Return {@link DataType} of computed value. */ | ||
| DataType outputType(); | ||
|
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| /** Compute value from given input. Input and output are serialized to string. */ | ||
| String eval(String input); | ||
|
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| static Expression create( | ||
| String exprName, String fieldReference, DataType fieldType, @Nullable String literal) { | ||
| switch (exprName) { | ||
| case "year": | ||
| return year(fieldReference); | ||
| // TODO: support more expression | ||
| default: | ||
| throw new UnsupportedOperationException( | ||
| String.format( | ||
| "Unsupported expression: %s. Supported expressions are: %s", | ||
| exprName, String.join(",", SUPPORTED_EXPRESSION))); | ||
| } | ||
| } | ||
|
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| static Expression year(String fieldReference) { | ||
| return new YearComputer(fieldReference); | ||
| } | ||
|
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| /** Compute year from a time input. */ | ||
| final class YearComputer implements Expression { | ||
|
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| private static final long serialVersionUID = 1L; | ||
|
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| private final String fieldReference; | ||
|
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| private YearComputer(String fieldReference) { | ||
| this.fieldReference = fieldReference; | ||
| } | ||
|
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| @Override | ||
| public String fieldReference() { | ||
| return fieldReference; | ||
| } | ||
|
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| @Override | ||
| public DataType outputType() { | ||
| return DataTypes.INT(); | ||
| } | ||
|
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| @Override | ||
| public String eval(String input) { | ||
| LocalDateTime localDateTime = DateTimeUtils.toLocalDateTime(input, 0); | ||
| return String.valueOf(localDateTime.getYear()); | ||
| } | ||
| } | ||
| } |
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