chaoyli commented on issue #5142:
URL:
https://github.com/apache/incubator-doris/issues/5142#issuecomment-750838601
The disk layout should take encoding algorithm and reading efficiency into
consideration.
So the disk layout will store the size without the absolute for every array
element.
```
The disk layout
* First Level Offsets (int32), First Level have no nulls
| Bytes 0-3 | Bytes 4-7 | Bytes 8-11 |
|------------|------------|------------|
| 2 | 3 | 1 |
* Second Nulls (uint8)
| Byte 1- 3 | Bytes 4 | Bytes 5 - 7|
|-----------------------------------|
| 0 | 1 | 0 |
* Second Level Offsets buffer (int32)
| Bytes 0-23 |
|----------------------|
| 2, 2, 3, 0, 1, 2 |
* Elements array (int32):
| Bytes 0-9 |
|-------------------------------|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 |
```
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