[FLINK-18621] Simplify the methods of Executor interface in sql client

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.12.0
• Component/s: Table SQL / Client
• Labels: pull-request-available
• Assignee: godfrey he
• Reporter: godfrey he
• Created: 17/Jul/20 07:38
• Updated: 31/Jul/20 12:32
• Resolved: 23/Jul/20 05:53

Description

After TableEnvironment#executeSql is introduced, many methods in Executor interface can be replaced with TableEnvironment#executeSql. Those methods include:
listCatalogs, listDatabases, createTable, dropTable, listTables, listFunctions, useCatalog, useDatabase, getTableSchema (use DESCRIBE xx)

Issue Links

• links to: GitHub Pull Request #12923