Yang Xiufeng

optimize transform_serialize_block for scalar column

1

**Summary** these steps in BlockBuilder.build covert block to full first. - [x] BloomIndexState::from_data_block https://github.com/datafuselabs/databend/pull/15910 - [x] gen_columns_statistics https://github.com/datafuselabs/databend/pull/15909

I hereby agree to the terms of the CLA available at: https://docs.databend.com/dev/policies/cla/ ## Summary https://github.com/datafuselabs/databend/issues/15706 ## Tests - [ ] Unit Test - [ ] Logic Test - [ ]...

optimize(fuse): record scalar column in meta file(or parquet meta)?.

3

**Summary** For a row in a large wide table, many (even most) columns may be null or set to their default values. This table might be loaded using SQL commands...

feat: orc support missing fields.

21

I hereby agree to the terms of the CLA available at: https://docs.databend.com/dev/policies/cla/ ## Summary compare only fields instead. ## Tests - [ ] Unit Test - [ ] Logic Test...

1. type default，''/0/null 2. gen for each row （need a default values generator instead of vec of scalas） 3. gen once for all rows （not meaningful？） 4. report error we...

**Summary** when `copy from 's3:://aa/bb/cc/' connection=(...)`, the root of tmp stage is `aa/bb/cc/`. if there are 2 files ``` aa/bb/cc/x.txt aa/bb/dd/x.txt ``` `copy from 's3:://aa/bb/cc/'` will record 'x.txt' as copied...

Feature: `replace into <table> from <stage>`

3

**Summary** just like `copy into table`, except 1. 'copy' -> 'replace' 2. support `ON ()` can solve https://github.com/datafuselabs/databend/issues/15774

feat: remove streaming upload?

1

**Summary** it is only used to load *local* files to Databend. instead user can 1. upload to stage and run `copy into table instead`. 2. if server runs locally only...

**Summary** https://github.com/datafuselabs/databend/actions/runs/9475675302/job/26107579646?pr=15776 at tests/sqllogictests/suites/base/09_fuse_engine/09_0036_merge_into_without_distributed_enable.test:222

bug: settings changes by set_var hint is not visible when build pipeline in cluster mode

3

**Summary** cc @zhang2014 @TCeason found when debugging my PR, not explicit as an example. I will try to provide an example later.