bug: sugger function cannot found when args incorrect

[guojidan]

Search before asking

• [X] I had searched in the issues and found no similar issues.

Version

main branch

What's Wrong?

I excute sql SELECT IFNULL(NULL); databend prompt me ifnull does not exist

root@localhost:8000/default> SELECT IFNULL(NULL);
error: APIError: ResponseError with 1008: error: 
  --> SQL:1:8
  |
1 | SELECT IFNULL(NULL)
  |        ^^^^^^^^^^^^ function `ifnull` does not exist

How to Reproduce?

No response

Are you willing to submit PR?

• [ ] Yes I am willing to submit a PR!

[guojidan]

cc @PsiACE