[FLINK-21836] Support parsing special commands by introducing ExtendedParser

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.13.0
• Fix Version/s: 1.13.0
• Component/s: Table SQL / Planner
• Labels: pull-request-available
• Assignee: Shengkai Fang
• Reporter: Shengkai Fang
• Created: 17/Mar/21 04:24
• Updated: 25/Mar/21 11:48
• Resolved: 25/Mar/21 11:47

Description

The ParseStrategyParser is responsible to convert statement to Operation by StatementParseStrategy.

In this JIRA, we also move the getCompletionHints from the planner to parser. The reason why we do this as follow:

• parser is the one to convert the input statement to operation.
• If we want to get completion hints about command from the planner, planner needs to also maintain a collection of the StatementParseStrategy. We think the responsiblity should belong to the parser rather than planner.

Issue Links

• links to: GitHub Pull Request #15265