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describe	Support or Not	note
describe catalog	No	has sqlNode but not support in table api
describe database	No	has sqlNode but not support in table api
describe table	Yes
describe function	No
describe view	No

current flink only supports describing tables.

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	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. EXTENDED ] db_name
describe function	Not Support	{ DESCRIBE \| DESC } FUNCTION [ catalog EXTENDED ] function_name
{ DESCRIBE \| DESC } [ QUERY ] input_statement .][db_name.]function	describe query	Not Support	..

Proposed TableEnvironment SQL API Changes:

Because `TableEnvironment` is a `@publicEvolving Api`, we may add these override methods or add some SupportsXXX interface to support these features.

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Code Block

Future Work

to be added

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