tree d9ee47a97f63ea7162c251ac7188c0c086055071
parent 4db85d849203d8c548e4bbc54dadd9eecf7cb224
author Kent Yao <yaooqinn@hotmail.com> 1588517357 +0800
committer Liu Xun <liuxun@apache.org> 1588599514 +0000

SUBMARINE-488. DCL Framework: SHOW ROLES syntax

### What is this PR for?

Part of DCL framework, this PR adds the show roles syntax support

### What type of PR is it?
Feature

### Todos
* [ ] - Task

### What is the Jira issue?
https://issues.apache.org/jira/browse/SUBMARINE-488

### How should this be tested?

add new unit tests

### Screenshots (if appropriate)

### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No

Author: Kent Yao <yaooqinn@hotmail.com>

Closes #274 from yaooqinn/SUBMARINE-488 and squashes the following commits:

0edd58e [Kent Yao] SUBMARINE-488. DCL Framework: SHOW ROLES syntax