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https://issues.apache.org/jira/browse/FLINK-12584?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jun Zhang closed FLINK-12584.
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Resolution: Won't Fix
> Add Bucket File Syetem Table Sink
> ---------------------------------
>
> Key: FLINK-12584
> URL: https://issues.apache.org/jira/browse/FLINK-12584
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / API
> Affects Versions: 1.8.0, 1.9.0
> Reporter: Jun Zhang
> Assignee: Jun Zhang
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> 1. *Motivation*
> In flink, the file system (especially hdfs) is a very common output, but for
> users using sql, it does not support directly using sql to write data to the
> file system, so I want to add a bucket file system table sink, the user can
> register it to StreamTableEnvironment, so that table api and sql api can
> directly use the sink to write stream data to filesystem
> 2.*example*
> tEnv.connect(new Bucket().basePath("hdfs://localhost/tmp/flink-data"))
> .withFormat(new Json().deriveSchema())
> .withSchema(new Schema()
> .field("name", Types. STRING ())
> .field("age", Types. INT ())
> .inAppendMode()
> .registerTableSink("myhdfssink");
> tEnv.sqlUpdate("insert into myhdfssink SELECT * FROM mytablesource");
>
> 3.*Some ideas to achieve this function*
> 1) Add a class Bucket which extends from ConnectorDescriptor, add some
> properties, such as basePath.
> 2) Add a class BucketValidator which extends from the
> ConnectorDescriptorValidator and is used to check the bucket descriptor.
> 3) Add a class FileSystemTableSink to implement the StreamTableSink
> interface. In the emitDataStream method, construct StreamingFileSink for
> writing data to filesystem according to different properties.
> 4) Add a factory class FileSystemTableSinkFactory to implement the
> StreamTableSinkFactory interface for constructing FileSystemTableSink
> 5) The parameters of withFormat method is the implementation classes of the
> FormatDescriptor interface, such as Json, Csv, and we can add Parquet、Orc
> later.
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