Jinbao Chen

Use FDW to query multiple servers as shards

4

This commit mainly meets the needs of users to query multiple clusters as external shards. fdw treats each data source as a whole without knowing its internal structure. It keeps...

### Search before asking - [x] I had searched in the [feature](https://github.com/apache/seatunnel/issues?q=is%3Aissue+label%3A%22Feature%22) and found no similar feature requirement. ### Description Run the initdb command and deploy the cluster successfully ###...

### Search before asking - [x] I had searched in the [feature](https://github.com/apache/seatunnel/issues?q=is%3Aissue+label%3A%22Feature%22) and found no similar feature requirement. ### Description Fix all che compile errors for merge branch ### Usage...

- [x] test_setup - [x] tablespace - [x] boolean - [x] char - [x] name - [x] varchar - [x] text - [x] int2 - [x] int4 - [x] int8...

The pgstat has been totally refactored in postgres. The bgwork pgstat has been removed. So we should check if it works well on mpp. https://github.com/postgres/postgres/commit/5891c7a8ed8f2d3d577e7eea34dacff12d7b6bbd#diff-6161d3e2403ae3e7c0e8434321221ec00f45b6e924eb0825651cb3352a882eaa