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…15812) First commit: clean backport of Extension to read and ingest Delta Lake tables #15755 Second commit: change version from 30.0.0 to 29.0.0
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| Original file line number | Diff line number | Diff line change |
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| --- | ||
| id: delta-lake | ||
| title: "Delta Lake extension" | ||
| --- | ||
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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. | ||
| --> | ||
|
|
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| ## Delta Lake extension | ||
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| Delta Lake is an open source storage framework that enables building a | ||
| Lakehouse architecture with various compute engines. [DeltaLakeInputSource](../../ingestion/input-sources.md#delta-lake-input-source) lets | ||
| you ingest data stored in a Delta Lake table into Apache Druid. To use the Delta Lake extension, add the `druid-deltalake-extensions` to the list of loaded extensions. | ||
| See [Loading extensions](../../configuration/extensions.md#loading-extensions) for more information. | ||
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| The Delta input source reads the configured Delta Lake table and extracts all the underlying delta files in the table's latest snapshot. | ||
| These Delta Lake files are versioned Parquet files. | ||
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| ## Version support | ||
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| The Delta Lake extension uses the Delta Kernel introduced in Delta Lake 3.0.0, which is compatible with Apache Spark 3.5.x. | ||
| Older versions are unsupported, so consider upgrading to Delta Lake 3.0.x or higher to use this extension. | ||
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| ## Known limitations | ||
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| - This extension relies on the Delta Kernel API and can only read from the latest Delta table snapshot. | ||
| - Column filtering isn't supported. The extension reads all columns in the configured table. |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,156 @@ | ||
| <?xml version="1.0" encoding="UTF-8"?> | ||
| <!-- | ||
| ~ 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. | ||
| --> | ||
| <project xmlns="http://maven.apache.org/POM/4.0.0" | ||
| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | ||
| xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> | ||
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| <groupId>org.apache.druid.extensions</groupId> | ||
| <artifactId>druid-deltalake-extensions</artifactId> | ||
| <name>druid-deltalake-extensions</name> | ||
| <description>Delta Lake connector for Druid</description> | ||
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| <parent> | ||
| <artifactId>druid</artifactId> | ||
| <groupId>org.apache.druid</groupId> | ||
| <version>29.0.0-SNAPSHOT</version> | ||
| <relativePath>../../pom.xml</relativePath> | ||
| </parent> | ||
| <modelVersion>4.0.0</modelVersion> | ||
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| <properties> | ||
| <delta-kernel.version>3.0.0</delta-kernel.version> | ||
| </properties> | ||
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| <dependencies> | ||
| <dependency> | ||
| <groupId>io.delta</groupId> | ||
| <artifactId>delta-kernel-api</artifactId> | ||
| <version>${delta-kernel.version}</version> | ||
| </dependency> | ||
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| <dependency> | ||
| <groupId>io.delta</groupId> | ||
| <artifactId>delta-kernel-defaults</artifactId> | ||
| <version>${delta-kernel.version}</version> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>org.apache.hadoop</groupId> | ||
| <artifactId>hadoop-client-api</artifactId> | ||
| <version>${hadoop.compile.version}</version> | ||
| <scope>compile</scope> | ||
| </dependency> | ||
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| <dependency> | ||
| <groupId>org.apache.druid</groupId> | ||
| <artifactId>druid-processing</artifactId> | ||
| <version>${project.parent.version}</version> | ||
| <scope>provided</scope> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.fasterxml.jackson.core</groupId> | ||
| <artifactId>jackson-annotations</artifactId> | ||
| <scope>provided</scope> | ||
| </dependency> | ||
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| <dependency> | ||
| <groupId>com.google.code.findbugs</groupId> | ||
| <artifactId>jsr305</artifactId> | ||
| <scope>provided</scope> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.google.guava</groupId> | ||
| <artifactId>guava</artifactId> | ||
| <scope>provided</scope> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.google.inject</groupId> | ||
| <artifactId>guice</artifactId> | ||
| <scope>provided</scope> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>joda-time</groupId> | ||
| <artifactId>joda-time</artifactId> | ||
| <scope>provided</scope> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.fasterxml.jackson.core</groupId> | ||
| <artifactId>jackson-core</artifactId> | ||
| <scope>provided</scope> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.fasterxml.jackson.core</groupId> | ||
| <artifactId>jackson-databind</artifactId> | ||
| <version>2.12.7.1</version> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>it.unimi.dsi</groupId> | ||
| <artifactId>fastutil-core</artifactId> | ||
| <version>8.5.4</version> | ||
| <scope>provided</scope> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>org.apache.hadoop</groupId> | ||
| <artifactId>hadoop-aws</artifactId> | ||
| <version>${hadoop.compile.version}</version> | ||
| <scope>runtime</scope> | ||
| <exclusions> | ||
| <exclusion> | ||
| <groupId>com.amazonaws</groupId> | ||
| <artifactId>aws-java-sdk-bundle</artifactId> | ||
| </exclusion> | ||
| </exclusions> | ||
| </dependency> | ||
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| <dependency> | ||
| <groupId>junit</groupId> | ||
| <artifactId>junit</artifactId> | ||
| <scope>test</scope> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>org.apache.druid</groupId> | ||
| <artifactId>druid-processing</artifactId> | ||
| <version>${project.parent.version}</version> | ||
| <type>test-jar</type> | ||
| <scope>test</scope> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>org.hamcrest</groupId> | ||
| <artifactId>hamcrest-all</artifactId> | ||
| <scope>test</scope> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>org.hamcrest</groupId> | ||
| <artifactId>hamcrest-core</artifactId> | ||
| <scope>test</scope> | ||
| </dependency> | ||
| </dependencies> | ||
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| <build> | ||
| <plugins> | ||
| <plugin> | ||
| <groupId>org.owasp</groupId> | ||
| <artifactId>dependency-check-maven</artifactId> | ||
| <configuration> | ||
| <skip>true</skip> | ||
| </configuration> | ||
| </plugin> | ||
| </plugins> | ||
| </build> | ||
| </project> |
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...eltalake-extensions/src/main/java/org/apache/druid/delta/common/DeltaLakeDruidModule.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| /* | ||
| * 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.druid.delta.common; | ||
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| import com.fasterxml.jackson.databind.Module; | ||
| import com.fasterxml.jackson.databind.jsontype.NamedType; | ||
| import com.fasterxml.jackson.databind.module.SimpleModule; | ||
| import com.google.inject.Binder; | ||
| import org.apache.druid.delta.input.DeltaInputSource; | ||
| import org.apache.druid.error.DruidException; | ||
| import org.apache.druid.initialization.DruidModule; | ||
| import org.apache.hadoop.conf.Configuration; | ||
| import org.apache.hadoop.fs.FileSystem; | ||
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| import java.util.Collections; | ||
| import java.util.List; | ||
|
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| public class DeltaLakeDruidModule implements DruidModule | ||
| { | ||
| @Override | ||
| public List<? extends Module> getJacksonModules() | ||
| { | ||
| return Collections.singletonList( | ||
| new SimpleModule("DeltaLakeDruidModule") | ||
| .registerSubtypes( | ||
| new NamedType(DeltaInputSource.class, DeltaInputSource.TYPE_KEY) | ||
| ) | ||
| ); | ||
| } | ||
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| @Override | ||
| public void configure(Binder binder) | ||
| { | ||
| final Configuration conf = new Configuration(); | ||
| conf.setClassLoader(getClass().getClassLoader()); | ||
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| ClassLoader currCtxCl = Thread.currentThread().getContextClassLoader(); | ||
| try { | ||
| Thread.currentThread().setContextClassLoader(getClass().getClassLoader()); | ||
| FileSystem.get(conf); | ||
| } | ||
| catch (Exception ex) { | ||
| throw DruidException.forPersona(DruidException.Persona.DEVELOPER) | ||
| .ofCategory(DruidException.Category.UNCATEGORIZED) | ||
| .build(ex, "Problem during fileSystem class level initialization"); | ||
| } | ||
| finally { | ||
| Thread.currentThread().setContextClassLoader(currCtxCl); | ||
| } | ||
| } | ||
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| } | ||
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