reifydb_routine/function/identity/
id.rs

1// SPDX-License-Identifier: Apache-2.0
2// Copyright (c) 2025 ReifyDB
3
4use reifydb_core::value::column::{Column, columns::Columns, data::ColumnData};
5use reifydb_type::value::r#type::Type;
6
7use crate::function::{Function, FunctionCapability, FunctionContext, FunctionInfo, error::FunctionError};
8
9pub struct Id {
10	info: FunctionInfo,
11}
12
13impl Default for Id {
14	fn default() -> Self {
15		Self::new()
16	}
17}
18
19impl Id {
20	pub fn new() -> Self {
21		Self {
22			info: FunctionInfo::new("identity::id"),
23		}
24	}
25}
26
27impl Function for Id {
28	fn info(&self) -> &FunctionInfo {
29		&self.info
30	}
31
32	fn capabilities(&self) -> &[FunctionCapability] {
33		&[FunctionCapability::Scalar]
34	}
35
36	fn return_type(&self, _input_types: &[Type]) -> Type {
37		Type::IdentityId
38	}
39
40	fn execute(&self, ctx: &FunctionContext, args: &Columns) -> Result<Columns, FunctionError> {
41		if !args.is_empty() {
42			return Err(FunctionError::ArityMismatch {
43				function: ctx.fragment.clone(),
44				expected: 0,
45				actual: args.len(),
46			});
47		}
48
49		let identity = ctx.identity;
50		let row_count = ctx.row_count.max(1);
51		if identity.is_anonymous() {
52			return Ok(Columns::new(vec![Column::new(
53				ctx.fragment.clone(),
54				ColumnData::none_typed(Type::IdentityId, row_count),
55			)]));
56		}
57
58		Ok(Columns::new(vec![Column::new(
59			ctx.fragment.clone(),
60			ColumnData::identity_id(vec![identity; row_count]),
61		)]))
62	}
63}
reifydb_routine/function/identity/id.rs

reifydb_routine/function/identity/
id.rs
