fix

Author: andylokandy

src/query/functions-v2/src/scalars/string_multi_args.rs

@@ -14,6 +14,7 @@
 
 use std::sync::Arc;
 
+use common_expression::types::NumberDataType;
 use common_expression::types::number::UInt8Type;
 use common_expression::types::string::StringColumn;
 use common_expression::types::string::StringColumnBuilder;
@@ -248,7 +249,7 @@ pub fn register(registry: &mut FunctionRegistry) {
         Some(Arc::new(Function {
             signature: FunctionSignature {
                 name: "char",
-                args_type: vec![DataType::UInt8; args_type.len()],
+                args_type: vec![DataType::Number(NumberDataType::UInt8); args_type.len()],
                 return_type: DataType::String,
                 property: FunctionProperty::default(),
             },
@@ -265,7 +266,7 @@ pub fn register(registry: &mut FunctionRegistry) {
         Some(Arc::new(Function {
             signature: FunctionSignature {
                 name: "char",
-                args_type: vec![DataType::Nullable(Box::new(DataType::UInt8)); args_type.len()],
+                args_type: vec![DataType::Nullable(Box::new(DataType::Number(NumberDataType::UInt8))); args_type.len()],
                 return_type: DataType::Nullable(Box::new(DataType::String)),
                 property: FunctionProperty::default(),
             },