feat: Add support for Vertica analytical database

[dingqiangliu]

Description

Add RDBMS connector for Vertica to support this project running on data warehouse with large data volume.
This connect only requires open source python driver of Vertica, vertica-python https://github.com/vertica/vertica-python. Its dependency is added in setup.py at the same time.

How Has This Been Tested?

All features about RDBMS connecor are tested including Chat DB and Chat Data.

1. pull a Vertica community version docker image.

docker pull vertica/vertica-ce

# see also: https://hub.docker.com/r/vertica/vertica-ce
docker run -p 5433:5433 -p 5444:5444 \
          --mount type=volume,source=vertica-data,target=/data \
          --name vertica_ce \
          vertica/vertica-ce

2. create database in DB-GPT with DB Type Vertica.

The database name is vertica_ce, port is 5433, username is dbadmin, and password is empty by default.

3. go to Chart DB and ask question about data model in database.

4. go to Chart Data and ask question about data in database.

Snapshots:

Include snapshots for easier review.

Checklist:

add support for Vertica analytical database

• My code follows the style guidelines of this project
• I have already rebased the commits and make the commit message conform to the project standard.
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Any dependent changes have been merged and published in downstream modules

[fangyinc]

Hi, @dingqiangliu, thank you for your contribution. Please fix pylint error with following commands:

make fmt
make mypy

[dingqiangliu]

Hello @fangyinc, pylint error fixed, please review it again.

[csunny]

@dingqiangliu Hello, I installed docker according to the above command, but an error occurred when linking.

The database vertica_ce does not exist

I noticed that you wrote testdb in the screenshot, but the default docker log is VMart. Can you give detailed instructions on how to create a test database and load test data?

[csunny]

I use default VMart database, chatdb works well

[fangyinc]

Test passed.

[fangyinc]

LGTM.

[csunny]

LGTM～