DdlCommand¶

DdlCommand is an abstraction of DDL commands that can be executed (by Executor).

Contract¶

Executing DDL Command¶

DdlCommandResult execute(
  Executor executor)

Used when:

• Executor is reuqested to execute a DDL command

Implementations¶

• AlterSourceCommand
• CreateSourceCommand
• DropSourceCommand
• DropTypeCommand
• RegisterTypeCommand