reifydb_routine/function/text/
repeat.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::{constraint::bytes::MaxBytes, container::utf8::Utf8Container, r#type::Type};
6
7use crate::function::{Function, FunctionCapability, FunctionContext, FunctionInfo, error::FunctionError};
8
9pub struct TextRepeat {
10	info: FunctionInfo,
11}
12
13impl Default for TextRepeat {
14	fn default() -> Self {
15		Self::new()
16	}
17}
18
19impl TextRepeat {
20	pub fn new() -> Self {
21		Self {
22			info: FunctionInfo::new("text::repeat"),
23		}
24	}
25}
26
27impl Function for TextRepeat {
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::Utf8
38	}
39
40	fn execute(&self, ctx: &FunctionContext, args: &Columns) -> Result<Columns, FunctionError> {
41		if args.len() != 2 {
42			return Err(FunctionError::ArityMismatch {
43				function: ctx.fragment.clone(),
44				expected: 2,
45				actual: args.len(),
46			});
47		}
48
49		let str_col = &args[0];
50		let count_col = &args[1];
51
52		let (str_data, str_bv) = str_col.data().unwrap_option();
53		let (count_data, count_bv) = count_col.data().unwrap_option();
54		let row_count = str_data.len();
55
56		match str_data {
57			ColumnData::Utf8 {
58				container: str_container,
59				..
60			} => {
61				let mut result_data = Vec::with_capacity(row_count);
62
63				for i in 0..row_count {
64					if !str_container.is_defined(i) {
65						result_data.push(String::new());
66						continue;
67					}
68
69					let count = match count_data {
70						ColumnData::Int1(c) => c.get(i).map(|&v| v as i64),
71						ColumnData::Int2(c) => c.get(i).map(|&v| v as i64),
72						ColumnData::Int4(c) => c.get(i).map(|&v| v as i64),
73						ColumnData::Int8(c) => c.get(i).copied(),
74						ColumnData::Uint1(c) => c.get(i).map(|&v| v as i64),
75						ColumnData::Uint2(c) => c.get(i).map(|&v| v as i64),
76						ColumnData::Uint4(c) => c.get(i).map(|&v| v as i64),
77						_ => {
78							return Err(FunctionError::InvalidArgumentType {
79								function: ctx.fragment.clone(),
80								argument_index: 1,
81								expected: vec![
82									Type::Int1,
83									Type::Int2,
84									Type::Int4,
85									Type::Int8,
86								],
87								actual: count_data.get_type(),
88							});
89						}
90					};
91
92					match count {
93						Some(n) if n >= 0 => {
94							let s = &str_container[i];
95							result_data.push(s.repeat(n as usize));
96						}
97						Some(_) => {
98							result_data.push(String::new());
99						}
100						None => {
101							result_data.push(String::new());
102						}
103					}
104				}
105
106				let result_col_data = ColumnData::Utf8 {
107					container: Utf8Container::new(result_data),
108					max_bytes: MaxBytes::MAX,
109				};
110
111				let combined_bv = match (str_bv, count_bv) {
112					(Some(b), Some(e)) => Some(b.and(e)),
113					(Some(b), None) => Some(b.clone()),
114					(None, Some(e)) => Some(e.clone()),
115					(None, None) => None,
116				};
117
118				let final_data = match combined_bv {
119					Some(bv) => ColumnData::Option {
120						inner: Box::new(result_col_data),
121						bitvec: bv,
122					},
123					None => result_col_data,
124				};
125				Ok(Columns::new(vec![Column::new(ctx.fragment.clone(), final_data)]))
126			}
127			other => Err(FunctionError::InvalidArgumentType {
128				function: ctx.fragment.clone(),
129				argument_index: 0,
130				expected: vec![Type::Utf8],
131				actual: other.get_type(),
132			}),
133		}
134	}
135}
reifydb_routine/function/text/repeat.rs

reifydb_routine/function/text/
repeat.rs
