[FLINK-22998] Flink SQL does not support block comment before SET command

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.14.0
• Component/s: Table SQL / API
• Assignee: Unassigned
• Reporter: Zhiwen Sun
• Created: 15/Jun/21 10:44
• Updated: 23/Jun/21 20:18

Description

Flink SQL does not support block comment before SET command.

A tiny SQL that produces the bug:

 

/**
 comment
**/
SET sql-client.execution.result-mode=TABLEAU;
SELECT 'hello';

 

while following SQL works fine:

 

SET sql-client.execution.result-mode=TABLEAU;
/**
 comment
**/
SELECT 'hello';

 

 

After I debug Flink source code, I found that EXTENDED_PARSER does not support block comment.