Vertica Bulk Export Action plugin gets executed after successful mapreduce or spark job. It executes select query on a vertica table and writes results in a provided file location in csv format.
| Configuration | Required | Default | Description |
|---|---|---|---|
| Path | Y | N/A | HDFS File path where exported data will be written. |
| Delimiter | Y | , | Delimiter in the output file. Values in each column is separated by this delimiter while writing to output file. |
| Username | N | N/A | User identity for connecting to the specified database. Required for databases that need authentication. Optional for databases that do not require authentication. |
| Password | N | N/A | Password to use to connect to the specified database. Required for databases that need authentication. Optional for databases that do not require authentication. |
| Connection String | Y | N/A | JDBC connection string including database name. |
| selectStatement | Y | N/A | Select command to select values from a vertica table |
The plugin can be configured to connect to vertica table using jdbc, execute provided select query and write exported data to provided HDFS File. The parent directories for HDFS file does not need to be present, the plugin will create them if they do not exist. Plugin also has an option to choose column delimiter which defaults to comma.
For running the vertica select query which can be found here, the plugin uses vertica jdbc driver class and executes select query using that jdbc driver. The exported file will have all the column names as first row and remaining rows will be data. All the columns will be read as String and if there are NULL values in columns, plugin emits them as null string value.
To build this plugin:
mvn clean package
The build will create a .jar and .json file under the target directory.
These files can be used to deploy your plugins.
If you are building this plugin for the first time, then do the following:
mvn install:install-file -Dfile=lib/vertica-jdbc-8.0.1-0.jar -DgroupId=vertica -DartifactId=vertica-jdbc -Dversion=8.0.1 -Dpackaging=jar
mvn clean package
This will install vertica-jdbc-8.0.1-0.jar to the local maven and make it available for packaging with the vertica-plugin jar.
You can deploy your plugins using the CDAP CLI:
> load artifact <target/vertica-bulk-load-<version>.jar config-file <target/vertica-bulk-load-<version>.json>
For example, if your artifact is named 'vertica-bulk-load-':
> load artifact target/vertica-bulk-load-<version>.jar config-file target/vertica-bulk-load-<version>.json
CDAP User Group and Development Discussions:
[email protected] <https://groups.google.com/d/forum/cdap-user>
The cdap-user mailing list is primarily for users using the product to develop applications or building plugins for appplications. You can expect questions from users, release announcements, and any other discussions that we think will be helpful to the users.
Copyright © 2017 Cask Data, Inc.
Licensed 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
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