strongduanmu opened a new issue #13441:
URL: https://github.com/apache/shardingsphere/issues/13441
## Background
This issue is a problem encountered during the issue #13091. In order to
route accurately for federation executor and hide the actual tables and actual
columns, we need to move the route engine, rewrite engine, executor, and merge
engine into the federation execution engine, which requires us to add
dependencies to the federation execution engine.
The current dependencies are as follows. If we add `infra-merge` dependency
in the infra-executor, it will cause a circular dependency.
```
org.apache.shardingsphere:shardingsphere-infra-executor:jar:5.0.0-RC1-SNAPSHOT
|----org.apache.shardingsphere:shardingsphere-infra-common:jar:5.0.0-RC1-SNAPSHOT:compile
|----org.apache.shardingsphere:shardingsphere-infra-rewrite:jar:5.0.0-RC1-SNAPSHOT:compile
|----org.apache.shardingsphere:shardingsphere-infra-optimize:jar:5.0.0-RC1-SNAPSHOT:compile
|----org.apache.calcite:calcite-core:jar:1.27.0:compile
|----org.apache.shardingsphere:shardingsphere-sql-parser-mysql:jar:5.0.0-RC1-SNAPSHOT:test
org.apache.shardingsphere:shardingsphere-infra-merge:jar:5.0.0-RC1-SNAPSHOT
|----org.apache.shardingsphere:shardingsphere-infra-binder:jar:5.0.0-RC1-SNAPSHOT:compile
|----org.apache.shardingsphere:shardingsphere-infra-executor:jar:5.0.0-RC1-SNAPSHOT:compile
```
## Adjust dependencies
So I want to discuss whether `infra-executor` can be split into multiple
sub-modules, the structure is as follows:
```
shardingsphere-infra-executor
|----shardingsphere-infra-executor-driver
|----shardingsphere-infra-executor-federation
|----shardingsphere-infra-context
|----shardingsphere-infra-optimize
|----shardingsphere-infra-merge
```
The `shardingsphere-infra-executor-driver` module is responsible for
handling standard kernel execution. The
`shardingsphere-infra-executor-federation` module is responsible for handling
query optimization statement execution.
Existing modules that rely on `shardingsphere-infra-executor` can be
replaced with `shardingsphere-infra-executor-driver`. If there are some modules
that rely on `shardingsphere-infra-executor-federation`, just add dependencies.
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