luoyuxia commented on code in PR #20696: URL: https://github.com/apache/flink/pull/20696#discussion_r964733789
########## docs/content.zh/docs/dev/table/hiveCompatibility/hiveDialect/show.md: ########## @@ -0,0 +1,119 @@ +--- +title: "Show Statements" +weight: 5 +type: docs +aliases: +- /dev/table/hiveCompatibility/hiveDialect/create.html +--- +<!-- +Licensed to the Apache Software Foundation (ASF) under one +or more contributor license agreements. See the NOTICE file +distributed with this work for additional information +regarding copyright ownership. The ASF licenses this file +to you under the Apache License, Version 2.0 (the +"License"); you may not use this file except in compliance +with the License. You may obtain a copy of the License at + http://www.apache.org/licenses/LICENSE-2.0 +Unless required by applicable law or agreed to in writing, +software distributed under the License is distributed on an +"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +KIND, either express or implied. See the License for the +specific language governing permissions and limitations +under the License. +--> + +# SHOW Statements + +With Hive dialect, the following SHOW statements are supported for now: + +- SHOW DATABASES +- SHOW TABLES +- SHOW VIEWS +- SHOW PARTITIONS +- SHOW FUNCTIONS + +## SHOW DATABASES + +### Description + +`SHOW DATABASES` statement is used to list all the databases defined in the metastore. + +### Syntax + +```sql +SHOW (DATABASES|SCHEMAS); +``` +The use of `SCHEMA` and `DATABASE` are interchangeable - they mean the same thing. + + +## SHOW TABLES + +### Description + +`SHOW TABLES` statement lists all the base tables and views in the current database. + +### Syntax + +```sql +SHOW TABLES; +``` + +## SHOW VIEWS + +### Description + +`SHOW VIEWS` statement lists all the views in the current database. + +### Syntax + +```sql +SHOW VIEWS; +``` + +## SHOW PARTITIONS + +### Description + +`SHOW PARTITIONS` lists all the existing partitions or the partitions matching the specified partition spec for a given base table. + +### Syntax + +```sql +SHOW PARTITIONS table_name [ partition_spec ]; +partition_spec: + : (partition_column = partition_col_value, partition_column = partition_col_value, ...) +``` + +### Parameter + +- partition_spec + + The optional `partition_spec` is used to what kind of partition should be returned. + When specified, the partitions that match the `partition_spec` specification are returned. + The `partition_spec` can be partial. Review Comment: add some explanation for it and the following example can also explains it. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
