Function unary_typecheck

src/expr/src/interpret.rs:1296–1312

(func: &UnaryFunc, arg: &ReprColumnType)

    };

    fn unary_typecheck(func: &UnaryFunc, arg: &ReprColumnType) -> bool {
        use UnaryFunc::*;
        match func {
            CastNumericToMzTimestamp(_) | NegNumeric(_) => arg.scalar_type == NUM_TYPE,
            CastJsonbToNumeric(_) | CastJsonbToBool(_) | CastJsonbToString(_) => {
                arg.scalar_type == ReprScalarType::Jsonb
            }
            ExtractTimestamp(_) | DateTruncTimestamp(_) => {
                arg.scalar_type == ReprScalarType::Timestamp
            }
            ExtractDate(_) => arg.scalar_type == ReprScalarType::Date,
            Not(_) => arg.scalar_type == ReprScalarType::Bool,
            IsNull(_) => true,
            TryParseMonotonicIso8601Timestamp(_) => arg.scalar_type == ReprScalarType::String,
            _ => false,
        }
    }

    fn interesting_binary_funcs() -> Vec<BinaryFunc> {
        vec![