JingsongLi opened a new pull request #9884: [FLINK-14266][table] Introduce RowCsvInputFormat to new CSV module URL: https://github.com/apache/flink/pull/9884 ## What is the purpose of the change Now, we have an old CSV, but that is not standard CSV support. we should support the RFC-compliant CSV format for table/sql. ## Brief change log Add RowCsvInputFormat and Use jackson ObjectReader.readValues(InputStream). We need deal with half-line reading when splitting large files into multiple splits. The difficulties are: 1. ObjectReader do not know current read offset, it has buffer to cache more bytes. But we need stop in the right place for reading a FileSplit. We use BoundedInputStream. 2. For the half-line reading, in open, we look for the next delimiter for split start, discard the first half of the line; and look for the next delimiter for split end to complete the whole line. ## Verifying this change RowCsvInputFormatTest and RowCsvInputFormatSplitTest ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): no - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: no - The serializers: no - The runtime per-record code paths (performance sensitive): no - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: no - The S3 file system connector: no ## Documentation - Does this pull request introduce a new feature? yes - If yes, how is the feature documented? JavaDocs
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