fix(expr): jsonb_populate_record shall support more data types

[xiangjinwu]

https://www.postgresql.org/docs/17/functions-json.html#id-1.5.8.22.8.13.2.2.9.1.2.1

To convert a JSON value to the SQL type of an output column, the following rules are applied in sequence:

• A JSON null value is converted to an SQL null in all cases.
• If the output column is of type json or jsonb, the JSON value is just reproduced exactly.
• If the output column is a composite (row) type, and the JSON value is a JSON object, the fields of the object are converted to columns of the output row type by recursive application of these rules.
• Likewise, if the output column is an array type and the JSON value is a JSON array, the elements of the JSON array are converted to elements of the output array by recursive application of these rules.
• Otherwise, if the JSON value is a string, the contents of the string are fed to the input conversion function for the column's data type.
• Otherwise, the ordinary text representation of the JSON value is fed to the input conversion function for the column's data type.

However the current implementation is:

risingwave/src/common/src/types/jsonb.rs

Line 523 in c658340

_ => Self(v).to_datum(ty)?,

risingwave/src/common/src/types/jsonb.rs

Lines 409 to 425 in c658340

	/// Convert the jsonb value to a datum.
	pub fn to_datum(self, ty: &DataType) -> Result<Datum, String> {
	if !matches!(
	ty,
	DataType::Jsonb
	| DataType::Boolean
	| DataType::Int16
	| DataType::Int32
	| DataType::Int64
	| DataType::Float32
	| DataType::Float64
	| DataType::Varchar
	| DataType::List(_)
	| DataType::Struct(_)
	) {
	return Err(format!("cannot cast jsonb to {ty}"));
	}

The error message actually confuses between cast and populate. Similarly the their inverses (cast and to_json) are not the same. Some examples in PostgreSQL:

test=# select to_jsonb(now());
              to_jsonb              
------------------------------------
 "2024-11-08T12:47:05.473043+00:00"
(1 row)

test=# select now()::jsonb;
ERROR:  cannot cast type timestamp with time zone to jsonb
LINE 1: select now()::jsonb;
                    ^
test=# select '"2024-11-08T12:47:05.473043+00:00"'::jsonb::timestamptz;
ERROR:  cannot cast type jsonb to timestamp with time zone
LINE 1: select '"2024-11-08T12:47:05.473043+00:00"'::jsonb::timestam...
                                                          ^
test=# select * from jsonb_to_record('{"ts": "2024-11-08T12:47:05.473043+00:00"}'::jsonb) as (ts timestamptz);
              ts               
-------------------------------
 2024-11-08 12:47:05.473043+00
(1 row)