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The TableFlattener takes a nested dataset and creates an equivalent unnested dataset. The unnested dataset is saved as Parquet. When an array or map is encountered in the original table, the flattener creates a new table and adds an id column to it which references the row in the parent table. Joining on the id column should produce the original dataset. The flattened dataset should be loaded into Postgres in order to run the query generator (in nested types mode) on it. There is a script that automates generaration, flattening and loading random data into Postgres and Impala: testdata/bin/generate-load-nested.sh -f Testing: - ran ./testdata/bin/generate-load-nested.sh -f and random nested data was generated and flattened as expected. Change-Id: I7e7a8e53ada9274759a3e2128b97bec292c129c6 Reviewed-on: http://gerrit.cloudera.org:8080/5787 Reviewed-by: Alex Behm <alex.behm@cloudera.com> Tested-by: Impala Public Jenkins
63 lines
2.1 KiB
XML
63 lines
2.1 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>org.apache.impala</groupId>
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<artifactId>nested-table-flattener</artifactId>
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<name>Impala Nested Table Flattener</name>
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<version>1.0-SNAPSHOT</version>
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<packaging>jar</packaging>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.3</version>
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<configuration>
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<source>1.7</source>
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<target>1.7</target>
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</configuration>
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</plugin>
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</plugins>
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</build>
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<repositories>
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<repository>
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<id>cloudera-repo-releases</id>
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<url>https://repository.cloudera.com/artifactory/repo/</url>
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</repository>
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</repositories>
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<dependencies>
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<dependency>
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<groupId>org.apache.hadoop</groupId>
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<artifactId>hadoop-client</artifactId>
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<version>2.6.0</version>
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</dependency>
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<dependency>
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<groupId>org.kitesdk</groupId>
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<artifactId>kite-data-core</artifactId>
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<version>1.0.0-cdh5.4.1</version>
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</dependency>
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</dependencies>
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</project>
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