reifydb_function/is/
type.rs

1// SPDX-License-Identifier: AGPL-3.0-or-later
2// Copyright (c) 2025 ReifyDB
3
4use reifydb_core::value::column::data::ColumnData;
5use reifydb_type::value::{Value, r#type::Type};
6
7use crate::{ScalarFunction, ScalarFunctionContext, error::ScalarFunctionError};
8
9pub struct IsType;
10
11impl IsType {
12	pub fn new() -> Self {
13		Self
14	}
15}
16
17impl ScalarFunction for IsType {
18	fn scalar(&self, ctx: ScalarFunctionContext) -> crate::error::ScalarFunctionResult<ColumnData> {
19		let columns = ctx.columns;
20		let row_count = ctx.row_count;
21
22		if columns.len() != 2 {
23			return Err(ScalarFunctionError::ArityMismatch {
24				function: ctx.fragment.clone(),
25				expected: 2,
26				actual: columns.len(),
27			});
28		}
29
30		let value_column = columns.get(0).unwrap();
31		let type_column = columns.get(1).unwrap();
32
33		// Extract target Type from second arg
34		// - ColumnData::Any containing Value::Type → use that type
35		// - Value::None → check for Option type
36		let target_type = match type_column.data().get_value(0) {
37			Value::Any(boxed) => match boxed.as_ref() {
38				Value::Type(t) => t.clone(),
39				_ => {
40					return Err(ScalarFunctionError::InvalidArgumentType {
41						function: ctx.fragment.clone(),
42						argument_index: 1,
43						expected: vec![Type::Any],
44						actual: boxed.get_type(),
45					});
46				}
47			},
48			Value::None {
49				..
50			} => Type::Option(Box::new(Type::Any)),
51			other => {
52				return Err(ScalarFunctionError::InvalidArgumentType {
53					function: ctx.fragment.clone(),
54					argument_index: 1,
55					expected: vec![Type::Any],
56					actual: other.get_type(),
57				});
58			}
59		};
60
61		// Per-row type check
62		let data: Vec<bool> = (0..row_count)
63			.map(|i| {
64				let vtype = value_column.data().get_value(i).get_type();
65				if target_type == Type::Option(Box::new(Type::Any)) {
66					vtype.is_option()
67				} else {
68					vtype == target_type
69				}
70			})
71			.collect();
72
73		Ok(ColumnData::bool(data))
74	}
75
76	fn return_type(&self, _input_types: &[Type]) -> Type {
77		Type::Boolean
78	}
79}
reifydb_function/is/type.rs

reifydb_function/is/
type.rs
