张林伟

# Which issue does this PR close? Closes #. # Rationale for this change # What changes are included in this PR? # Are there any user-facing changes?

# Which issue does this PR close? Closes #. # Rationale for this change # What changes are included in this PR? # Are there any user-facing changes?

refer to talent plan https://github.com/pingcap/talent-plan/tree/master/courses/dss/raft

### Is your feature request related to a problem or challenge? I have a user defined table function `FlattenTableFunc` whice needs reading data from other table provider. To serialize execution...

## Which issue does this PR close? Closes https://github.com/apache/datafusion/issues/11143. ## Rationale for this change ## What changes are included in this PR? ## Are these changes tested? ## Are there...

## Which issue does this PR close? Closes #. ## Rationale for this change ## What changes are included in this PR? ## Are these changes tested? ## Are there...

Fix job hangs when partition count of plan is zero

1

# Which issue does this PR close? Closes #. # Rationale for this change When partition count of execution plan is 0, the job will hang because available tasks of...

## Which issue does this PR close? part of https://github.com/apache/datafusion/issues/11502. ## Rationale for this change ## What changes are included in this PR? ## Are these changes tested? ## Are...

Improve binary scalars display

1

## Which issue does this PR close? Closes #. ## Rationale for this change Binary scalars might be large, which makes plan printing so long. ## What changes are included...

Feature: EXPLAIN VERBOSE support for databend-common-ast

4

**Summary** Support `explain verbose ` syntax. I could implement it by adding a `verbose` field to explain statement (I think more reasonable than adding a new `ExplainKind::Verbose`).