Omega359 commented on code in PR #15928: URL: https://github.com/apache/datafusion/pull/15928#discussion_r2178426472
########## datafusion/functions/src/regex/regexpinstr.rs: ########## @@ -0,0 +1,826 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +use arrow::array::{ + Array, ArrayRef, AsArray, Datum, Int64Array, PrimitiveArray, StringArrayType, +}; +use arrow::datatypes::{DataType, Int64Type}; +use arrow::datatypes::{ + DataType::Int64, DataType::LargeUtf8, DataType::Utf8, DataType::Utf8View, +}; +use arrow::error::ArrowError; +use datafusion_common::{exec_err, internal_err, Result, ScalarValue}; +use datafusion_expr::{ + ColumnarValue, Documentation, ScalarUDFImpl, Signature, TypeSignature::Exact, + TypeSignature::Uniform, Volatility, +}; +use datafusion_macros::user_doc; +use itertools::izip; +use regex::Regex; +use std::collections::HashMap; +use std::sync::Arc; + +use crate::regex::compile_and_cache_regex; + +#[user_doc( + doc_section(label = "Regular Expression Functions"), + description = "Returns the position in a string where the specified occurrence of a POSIX regular expression is located.", + syntax_example = "regexp_instr(str, regexp[, start[, N[, flags]]])", + sql_example = r#"```sql +> SELECT regexp_instr('ABCDEF', 'C(.)(..)'); ++---------------------------------------------------------------+ +| regexp_instr(Utf8("ABCDEF"),Utf8("C(.)(..)")) | ++---------------------------------------------------------------+ +| 3 | ++---------------------------------------------------------------+ +```"#, + standard_argument(name = "str", prefix = "String"), + standard_argument(name = "regexp", prefix = "Regular"), + argument( + name = "start", + description = "- **start**: Optional start position (the first position is 1) to search for the regular expression. Can be a constant, column, or function. Defaults to 1" + ), + argument( + name = "N", + description = "- **N**: Optional The N-th occurrence of pattern to find. Defaults to 1 (first match). Can be a constant, column, or function." + ), + argument( + name = "flags", + description = r#"Optional regular expression flags that control the behavior of the regular expression. The following flags are supported: + - **i**: case-insensitive: letters match both upper and lower case + - **m**: multi-line mode: ^ and $ match begin/end of line + - **s**: allow . to match \n + - **R**: enables CRLF mode: when multi-line mode is enabled, \r\n is used + - **U**: swap the meaning of x* and x*?"# + ), + argument( + name = "subexpr", Review Comment: subexpr is not shown in the syntax example. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For additional commands, e-mail: github-h...@datafusion.apache.org
