How to use function call 'date_add'

[wodejiong]

I rewrite a sql, want to use date_add function.

right = new FunctionCall(QualifiedName.of("date_add"), List.of(new Identifier("second"), param, right));

this can't work.
error msg is :
"errorMessage": "Column 'second' cannot be resolved",

How to use this function.

[wodejiong]

need to use StringLiteral.
right = new FunctionCall(QualifiedName.of("date_add"), List.of(new StringLiteral("second"), param, right));