reifydb_routine/function/datetime/
from_epoch_millis.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::{container::temporal::TemporalContainer, datetime::DateTime, r#type::Type};
6
7use crate::function::{Function, FunctionCapability, FunctionContext, FunctionInfo, error::FunctionError};
8
9pub struct DateTimeFromEpochMillis {
10	info: FunctionInfo,
11}
12
13impl Default for DateTimeFromEpochMillis {
14	fn default() -> Self {
15		Self::new()
16	}
17}
18
19impl DateTimeFromEpochMillis {
20	pub fn new() -> Self {
21		Self {
22			info: FunctionInfo::new("datetime::from_epoch_millis"),
23		}
24	}
25}
26
27fn extract_i64(data: &ColumnData, i: usize) -> Option<i64> {
28	match data {
29		ColumnData::Int1(c) => c.get(i).map(|&v| v as i64),
30		ColumnData::Int2(c) => c.get(i).map(|&v| v as i64),
31		ColumnData::Int4(c) => c.get(i).map(|&v| v as i64),
32		ColumnData::Int8(c) => c.get(i).copied(),
33		ColumnData::Int16(c) => c.get(i).map(|&v| v as i64),
34		ColumnData::Uint1(c) => c.get(i).map(|&v| v as i64),
35		ColumnData::Uint2(c) => c.get(i).map(|&v| v as i64),
36		ColumnData::Uint4(c) => c.get(i).map(|&v| v as i64),
37		ColumnData::Uint8(c) => c.get(i).map(|&v| v as i64),
38		ColumnData::Uint16(c) => c.get(i).map(|&v| v as i64),
39		_ => None,
40	}
41}
42
43fn is_integer_type(data: &ColumnData) -> bool {
44	matches!(
45		data,
46		ColumnData::Int1(_)
47			| ColumnData::Int2(_) | ColumnData::Int4(_)
48			| ColumnData::Int8(_) | ColumnData::Int16(_)
49			| ColumnData::Uint1(_)
50			| ColumnData::Uint2(_)
51			| ColumnData::Uint4(_)
52			| ColumnData::Uint8(_)
53			| ColumnData::Uint16(_)
54	)
55}
56
57impl Function for DateTimeFromEpochMillis {
58	fn info(&self) -> &FunctionInfo {
59		&self.info
60	}
61
62	fn capabilities(&self) -> &[FunctionCapability] {
63		&[FunctionCapability::Scalar]
64	}
65
66	fn return_type(&self, _input_types: &[Type]) -> Type {
67		Type::DateTime
68	}
69
70	fn execute(&self, ctx: &FunctionContext, args: &Columns) -> Result<Columns, FunctionError> {
71		if args.len() != 1 {
72			return Err(FunctionError::ArityMismatch {
73				function: ctx.fragment.clone(),
74				expected: 1,
75				actual: args.len(),
76			});
77		}
78
79		let column = &args[0];
80		let (data, bitvec) = column.data().unwrap_option();
81		let row_count = data.len();
82
83		if !is_integer_type(data) {
84			return Err(FunctionError::InvalidArgumentType {
85				function: ctx.fragment.clone(),
86				argument_index: 0,
87				expected: vec![
88					Type::Int1,
89					Type::Int2,
90					Type::Int4,
91					Type::Int8,
92					Type::Int16,
93					Type::Uint1,
94					Type::Uint2,
95					Type::Uint4,
96					Type::Uint8,
97					Type::Uint16,
98				],
99				actual: data.get_type(),
100			});
101		}
102
103		let mut container = TemporalContainer::with_capacity(row_count);
104
105		for i in 0..row_count {
106			if let Some(millis) = extract_i64(data, i) {
107				if millis < 0 {
108					return Err(FunctionError::ExecutionFailed {
109						function: ctx.fragment.clone(),
110						reason: format!(
111							"datetime::from_epoch_millis does not support negative timestamps: {}",
112							millis
113						),
114					});
115				}
116				container.push(DateTime::from_timestamp_millis(millis as u64)?);
117			} else {
118				container.push_default();
119			}
120		}
121
122		let result_data = ColumnData::DateTime(container);
123
124		let final_data = if let Some(bv) = bitvec {
125			ColumnData::Option {
126				inner: Box::new(result_data),
127				bitvec: bv.clone(),
128			}
129		} else {
130			result_data
131		};
132
133		Ok(Columns::new(vec![Column::new(ctx.fragment.clone(), final_data)]))
134	}
135}
reifydb_routine/function/datetime/from_epoch_millis.rs

reifydb_routine/function/datetime/
from_epoch_millis.rs
