reifydb-routine 0.4.5

Built-in routines (functions and procedures) for ReifyDB
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41

// SPDX-License-Identifier: Apache-2.0
// Copyright (c) 2025 ReifyDB

use reifydb_core::value::column::data::ColumnData;
use reifydb_type::value::r#type::Type;

use crate::function::{
	ScalarFunction, ScalarFunctionContext,
	error::{ScalarFunctionError, ScalarFunctionResult},
};

pub struct Id;

impl Id {
	pub fn new() -> Self {
		Self {}
	}
}

impl ScalarFunction for Id {
	fn scalar(&self, ctx: ScalarFunctionContext) -> ScalarFunctionResult<ColumnData> {
		if ctx.columns.len() != 0 {
			return Err(ScalarFunctionError::ArityMismatch {
				function: ctx.fragment.clone(),
				expected: 0,
				actual: ctx.columns.len(),
			});
		}

		let identity = ctx.identity;
		if identity.is_anonymous() {
			return Ok(ColumnData::none_typed(Type::IdentityId, ctx.row_count));
		}

		Ok(ColumnData::identity_id(vec![identity; ctx.row_count]))
	}

	fn return_type(&self, _input_types: &[Type]) -> Type {
		Type::IdentityId
	}
}