reifydb_function/text/
index_of.rs

1// SPDX-License-Identifier: AGPL-3.0-or-later
2// Copyright (c) 2025 ReifyDB
3
4use reifydb_core::value::column::data::ColumnData;
5use reifydb_type::value::r#type::Type;
6
7use crate::{
8	ScalarFunction, ScalarFunctionContext,
9	error::{ScalarFunctionError, ScalarFunctionResult},
10	propagate_options,
11};
12
13pub struct TextIndexOf;
14
15impl TextIndexOf {
16	pub fn new() -> Self {
17		Self
18	}
19}
20
21impl ScalarFunction for TextIndexOf {
22	fn scalar(&self, ctx: ScalarFunctionContext) -> ScalarFunctionResult<ColumnData> {
23		if let Some(result) = propagate_options(self, &ctx) {
24			return result;
25		}
26
27		let columns = ctx.columns;
28		let row_count = ctx.row_count;
29
30		if columns.len() != 2 {
31			return Err(ScalarFunctionError::ArityMismatch {
32				function: ctx.fragment.clone(),
33				expected: 2,
34				actual: columns.len(),
35			});
36		}
37
38		let str_col = columns.get(0).unwrap();
39		let substr_col = columns.get(1).unwrap();
40
41		match (str_col.data(), substr_col.data()) {
42			(
43				ColumnData::Utf8 {
44					container: str_container,
45					..
46				},
47				ColumnData::Utf8 {
48					container: substr_container,
49					..
50				},
51			) => {
52				let mut result_data = Vec::with_capacity(row_count);
53				let mut result_bitvec = Vec::with_capacity(row_count);
54
55				for i in 0..row_count {
56					if str_container.is_defined(i) && substr_container.is_defined(i) {
57						let s = &str_container[i];
58						let substr = &substr_container[i];
59						let index = s
60							.find(substr.as_str())
61							.map(|pos| {
62								// Convert byte position to character position
63								s[..pos].chars().count() as i32
64							})
65							.unwrap_or(-1);
66						result_data.push(index);
67						result_bitvec.push(true);
68					} else {
69						result_data.push(0);
70						result_bitvec.push(false);
71					}
72				}
73
74				Ok(ColumnData::int4_with_bitvec(result_data, result_bitvec))
75			}
76			(
77				ColumnData::Utf8 {
78					..
79				},
80				other,
81			) => Err(ScalarFunctionError::InvalidArgumentType {
82				function: ctx.fragment.clone(),
83				argument_index: 1,
84				expected: vec![Type::Utf8],
85				actual: other.get_type(),
86			}),
87			(other, _) => Err(ScalarFunctionError::InvalidArgumentType {
88				function: ctx.fragment.clone(),
89				argument_index: 0,
90				expected: vec![Type::Utf8],
91				actual: other.get_type(),
92			}),
93		}
94	}
95
96	fn return_type(&self, _input_types: &[Type]) -> Type {
97		Type::Int4
98	}
99}
reifydb_function/text/index_of.rs

reifydb_function/text/
index_of.rs
