AbsaOSS / AbsaOSS/cobrix

Add the ability to reassemble a multi-segment file

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#612 0 条评论 0 个 reaction 已指派 1 人 已被 @yruslan 认领 在 GitHub 查看
enhancement
主要语言
Scala
星标
170
派生
96
平均合并
57 分钟
30 天内合并 PR
2

描述

## Background
Multisegment files often have this structure:
```
file header record
segment header record
main segment record
child1 segment record
child2 segment record
...
segment footer record
segment header record
main segment record
child1 segment record
child2 segment record
...
segment footer record
file footer record
```

## Feature
Implement options that would allow reassembling multiple segment into records like this:
```
file header | segment header | main segment | child1 segment | child2 segment | segment footer | file footer
file header | segment header | main segment | child1 segment | child2 segment | segment footer | file footer
file header | segment header | main segment | child1 segment | child2 segment | segment footer | file footer
```

Not every type of segment should be present. The only mandatory segment is the main segment of a record.

## Proposed Solution
This kind of processing is possible using windowing functions. But this can be very slow.

Adding support for such a processing on the record reader level can significantly improve the performance.

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