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feat(sink): add json encode for file sink #18744

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@wcy-fdu wcy-fdu commented Sep 27, 2024

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What's changed and what's your intention?

The implementation detail is almost the same with snowflake sink, and the difference is

  • in snowflake sink, the file name contains a uuid to distinguish the parallelism, while the file sink directly uses executor_id.
  • in snowflake sink, there are no line breaks between lines, but the file sink has.(I think it's more friendly with user)

Todo:

  • add e2e/ci test.

Checklist

  • I have written necessary rustdoc comments
  • I have added necessary unit tests and integration tests
  • I have added test labels as necessary. See details.
  • I have added fuzzing tests or opened an issue to track them. (Optional, recommended for new SQL features Sqlsmith: Sql feature generation #7934).
  • My PR contains breaking changes. (If it deprecates some features, please create a tracking issue to remove them in the future).
  • All checks passed in ./risedev check (or alias, ./risedev c)
  • My PR changes performance-critical code. (Please run macro/micro-benchmarks and show the results.)
  • My PR contains critical fixes that are necessary to be merged into the latest release. (Please check out the details)

Documentation

  • My PR needs documentation updates. (Please use the Release note section below to summarize the impact on users)

Release note

Add json encode for file sink, which allow user to sink json files into object storage.
If this PR includes changes that directly affect users or other significant modifications relevant to the community, kindly draft a release note to provide a concise summary of these changes. Please prioritize highlighting the impact these changes will have on users.

assert_eq!(op, Op::Insert, "expect all `op(s)` to be `Op::Insert`");
// to prevent temporary string allocation,
// so we directly write to `chunk_buf` implicitly via `write_fmt`.
writeln!(
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in snowflake sink, there are no line breaks between lines, but the file sink has.(I think it's more friendly with user).

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