feat(parquet): read in parallel.

[youngsofun]

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Summary

Summary about this PR

part of #7732

Fixes #7231 (big parquet oom)

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1 Ignored Deployment

Name	Status	Preview	Updated
databend	⬜️ Ignored (Inspect)		Sep 27, 2022 at 1:12AM (UTC)

[youngsofun]

@dantengsky I often see errors like this when I test copy into ontime200 .. manually , even on a new table just created (with table name never used before)

 2022-09-26T12:53:10.803063Z ERROR common_meta_api::schema_api_impl: error=TableVersionMismatched: 160 expect `== 163` but `168`  while `update_table_meta

I deleted local ./databend and testbucket/admin/1 on minio

[dantengsky]

@dantengsky I often see errors like this when I test copy into ontime200 .. manually , even on a new table just created (with table name never used before)

 2022-09-26T12:53:10.803063Z ERROR common_meta_api::schema_api_impl: error=TableVersionMismatched: 160 expect `== 163` but `168`  while `update_table_meta

I deleted local ./databend and testbucket/admin/1 on minio

yes ,I'have saw the same errors occasionally, in some unexpected situations(where I think there should be no TableVersionMismatched exception). unfortunately, I forget the details : (

but in my case, it is not related to the deletion of data from storage.

is there a way to reproduce this error?

[youngsofun]

interpreters::interpreter_table_recluster::test_alter_recluster_interpreter
fail again @zhyass

#7849

---

all tests are passed, except this not related flaky one. just need to rerun.

[youngsofun]

@dantengsky

mysql> copy into ontime4 from 's3://testbucket/admin/data/ontime_200.csv' CONNECTION=(aws_key_id='minioadmin' aws_secret_key='minioadmin' endpoint_url='http://127.0.0.1:9900/') FILE_FORMAT = (type = 'csv' skip_header=1 ) force=true;