[FLINK-13777] Introduce sql function wrappers and conversion to ExpressionConverter

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Component/s: Table SQL / Planner
• Assignee: Unassigned
• Reporter: Jingsong Lee
• Created: 19/Aug/19 13:34
• Updated: 10/Jun/20 07:23
• Resolved: 10/Jun/20 07:23

Description

For remove the extended calcite sql functions, we introduce wrappers to wrap flink FunctionDefinition:

1.Add SqlReturnTypeInferenceWrapper to wrap TypeStrategy

2.Add SqlOperandTypeInferenceWrapper to wrap InputTypeStrategy

3.Add SqlOperandTypeCheckerWrapper to wrap InputTypeValidator

4.Add SqlFunctionWrapper to wrap SqlFunction

5.Add SqlFunctionWrapper converter and Standard sql converter