reifydb_routine/function/math/
log.rs

1// SPDX-License-Identifier: Apache-2.0
2// Copyright (c) 2025 ReifyDB
3
4use num_traits::ToPrimitive;
5use reifydb_core::value::column::{ColumnWithName, buffer::ColumnBuffer, columns::Columns};
6use reifydb_type::value::r#type::{Type, input_types::InputTypes};
7
8use crate::routine::{Function, FunctionKind, Routine, RoutineInfo, context::FunctionContext, error::RoutineError};
9
10pub struct Log {
11	info: RoutineInfo,
12}
13
14impl Default for Log {
15	fn default() -> Self {
16		Self::new()
17	}
18}
19
20impl Log {
21	pub fn new() -> Self {
22		Self {
23			info: RoutineInfo::new("math::log"),
24		}
25	}
26}
27
28fn numeric_to_f64(data: &ColumnBuffer, i: usize) -> Option<f64> {
29	match data {
30		ColumnBuffer::Int1(c) => c.get(i).map(|&v| v as f64),
31		ColumnBuffer::Int2(c) => c.get(i).map(|&v| v as f64),
32		ColumnBuffer::Int4(c) => c.get(i).map(|&v| v as f64),
33		ColumnBuffer::Int8(c) => c.get(i).map(|&v| v as f64),
34		ColumnBuffer::Int16(c) => c.get(i).map(|&v| v as f64),
35		ColumnBuffer::Uint1(c) => c.get(i).map(|&v| v as f64),
36		ColumnBuffer::Uint2(c) => c.get(i).map(|&v| v as f64),
37		ColumnBuffer::Uint4(c) => c.get(i).map(|&v| v as f64),
38		ColumnBuffer::Uint8(c) => c.get(i).map(|&v| v as f64),
39		ColumnBuffer::Uint16(c) => c.get(i).map(|&v| v as f64),
40		ColumnBuffer::Float4(c) => c.get(i).map(|&v| v as f64),
41		ColumnBuffer::Float8(c) => c.get(i).copied(),
42		ColumnBuffer::Int {
43			container,
44			..
45		} => container.get(i).map(|v| v.0.to_f64().unwrap_or(0.0)),
46		ColumnBuffer::Uint {
47			container,
48			..
49		} => container.get(i).map(|v| v.0.to_f64().unwrap_or(0.0)),
50		ColumnBuffer::Decimal {
51			container,
52			..
53		} => container.get(i).map(|v| v.0.to_f64().unwrap_or(0.0)),
54		_ => None,
55	}
56}
57
58impl<'a> Routine<FunctionContext<'a>> for Log {
59	fn info(&self) -> &RoutineInfo {
60		&self.info
61	}
62
63	fn return_type(&self, _input_types: &[Type]) -> Type {
64		Type::Float8
65	}
66
67	fn execute(&self, ctx: &mut FunctionContext<'a>, args: &Columns) -> Result<Columns, RoutineError> {
68		if args.len() != 1 {
69			return Err(RoutineError::FunctionArityMismatch {
70				function: ctx.fragment.clone(),
71				expected: 1,
72				actual: args.len(),
73			});
74		}
75
76		let column = &args[0];
77		let (data, bitvec) = column.unwrap_option();
78		let row_count = data.len();
79
80		if !data.get_type().is_number() {
81			return Err(RoutineError::FunctionInvalidArgumentType {
82				function: ctx.fragment.clone(),
83				argument_index: 0,
84				expected: InputTypes::numeric().expected_at(0).to_vec(),
85				actual: data.get_type(),
86			});
87		}
88
89		let mut result = Vec::with_capacity(row_count);
90		let mut res_bitvec = Vec::with_capacity(row_count);
91
92		for i in 0..row_count {
93			match numeric_to_f64(data, i) {
94				Some(v) => {
95					result.push(v.ln());
96					res_bitvec.push(true);
97				}
98				None => {
99					result.push(0.0);
100					res_bitvec.push(false);
101				}
102			}
103		}
104
105		let result_data = ColumnBuffer::float8_with_bitvec(result, res_bitvec);
106		let final_data = if let Some(bv) = bitvec {
107			ColumnBuffer::Option {
108				inner: Box::new(result_data),
109				bitvec: bv.clone(),
110			}
111		} else {
112			result_data
113		};
114
115		Ok(Columns::new(vec![ColumnWithName::new(ctx.fragment.clone(), final_data)]))
116	}
117}
118
119impl Function for Log {
120	fn kinds(&self) -> &[FunctionKind] {
121		&[FunctionKind::Scalar]
122	}
123}
reifydb_routine/function/math/log.rs

reifydb_routine/function/math/
log.rs
