THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
...
We can see current flink many sql statements only support showing with full datas, without 'FROM/IN' or 'LIKE' filter clause.
show create | Support or Not |
show create database | No |
show create table | Yes |
show create view | Yes |
show create function | No |
describe | Support or Not |
describe catalog | No |
describe database | No |
describe table | Yes |
describe function | No |
describe |
view | No |
current flink only supports describing tables.
...
So we propose this flip, try to support these features.
Proposed Syntax Changes:
We compare flink with other popular engines and give an improved syntax, because it may be modified under discuss, we put it on the google docs.
please see FLIP-297: Improve Auxiliary Sql Statements Docs, Feedback is welcome.
before | after(under discussed) | Note | |
show catalogs | SHOW CATALOGS | SHOW CATALOGS[ [NOT] LIKE <sql_like_pattern> ] | |
show databases | SHOW DATABASES | SHOW DATABASES [ ( FROM | IN ) catalog_name] [ [NOT] LIKE <sql_like_pattern> ] | |
show functions | SHOW [USER] FUNCTIONS | SHOW [USER] FUNCTIONS [ ( FROM | IN ) [catalog_name.]database_name ] [ [NOT] LIKE <sql_like_pattern> ] | |
show views | SHOW VIEWS | SHOW VIEWS [ ( FROM | IN ) [catalog_name.]database_name ] [ [NOT] LIKE <sql_like_pattern> ] | |
show modules | SHOW [FULL] MODULES | SHOW [FULL] MODULES [ [NOT] LIKE <sql_like_pattern> ] | |
show jars | SHOW JARS | SHOW JARS [ [NOT] LIKE <sql_like_pattern> ] | only work in SQL CLI or SQL Gateway. |
show jobs | SHOW JOBS | SHOW JOBS [ [NOT] LIKE <sql_like_pattern> ] | only work in SQL CLI or SQL Gateway. |
describe catalog | Not Support | { DESCRIBE | DESC } CATALOG catalog_name | |
describe database | Not Support | { DESCRIBE | DESC } DATABASE [catalog_name.]db_name | |
describe function | Not Support | { DESCRIBE | DESC } FUNCTION [catalog_name.][db_name.]function | |
describe query | Not Support | { DESCRIBE | DESC } [ QUERY ] input_statement |
...