reifydb_routine/function/identity/
id.rs

1// SPDX-License-Identifier: Apache-2.0
2// Copyright (c) 2025 ReifyDB
3
4use reifydb_core::value::column::{ColumnWithName, buffer::ColumnBuffer, columns::Columns};
5use reifydb_type::value::r#type::Type;
6
7use crate::routine::{Function, FunctionKind, Routine, RoutineInfo, context::FunctionContext, error::RoutineError};
8
9pub struct Id {
10	info: RoutineInfo,
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: RoutineInfo::new("identity::id"),
23		}
24	}
25}
26
27impl<'a> Routine<FunctionContext<'a>> for Id {
28	fn info(&self) -> &RoutineInfo {
29		&self.info
30	}
31
32	fn return_type(&self, _input_types: &[Type]) -> Type {
33		Type::IdentityId
34	}
35
36	fn execute(&self, ctx: &mut FunctionContext<'a>, args: &Columns) -> Result<Columns, RoutineError> {
37		if !args.is_empty() {
38			return Err(RoutineError::FunctionArityMismatch {
39				function: ctx.fragment.clone(),
40				expected: 0,
41				actual: args.len(),
42			});
43		}
44
45		let identity = ctx.identity;
46		let row_count = ctx.row_count.max(1);
47		if identity.is_anonymous() {
48			return Ok(Columns::new(vec![ColumnWithName::new(
49				ctx.fragment.clone(),
50				ColumnBuffer::none_typed(Type::IdentityId, row_count),
51			)]));
52		}
53
54		Ok(Columns::new(vec![ColumnWithName::new(
55			ctx.fragment.clone(),
56			ColumnBuffer::identity_id(vec![identity; row_count]),
57		)]))
58	}
59}
60
61impl Function for Id {
62	fn kinds(&self) -> &[FunctionKind] {
63		&[FunctionKind::Scalar]
64	}
65}
reifydb_routine/function/identity/id.rs

reifydb_routine/function/identity/
id.rs
