anthonylouisbsb commented on a change in pull request #10518: URL: https://github.com/apache/arrow/pull/10518#discussion_r669196057
########## File path: cpp/src/gandiva/string_function_holder.h ########## @@ -0,0 +1,140 @@ +// 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. + +#pragma once + +#include <re2/re2.h> + +#include <memory> +#include <string> + +#include "arrow/status.h" +#include "gandiva/execution_context.h" +#include "gandiva/function_holder.h" +#include "gandiva/node.h" +#include "gandiva/visibility.h" + +namespace gandiva { + +/// Function Holder for SQL 'like' +class GANDIVA_EXPORT LikeHolder : public FunctionHolder { + public: + ~LikeHolder() override = default; + + static Status Make(const FunctionNode& node, std::shared_ptr<LikeHolder>* holder); + + static Status Make(const std::string& sql_pattern, std::shared_ptr<LikeHolder>* holder); + + static Status Make(const std::string& sql_pattern, const std::string& escape_char, + std::shared_ptr<LikeHolder>* holder); + + static Status Make(const std::string& sql_pattern, std::shared_ptr<LikeHolder>* holder, + RE2::Options regex_op); + + // Try and optimise a function node with a "like" pattern. + static const FunctionNode TryOptimize(const FunctionNode& node); + + /// Return true if the data matches the pattern. + bool operator()(const std::string& data) { return RE2::FullMatch(data, regex_); } + + private: + explicit LikeHolder(const std::string& pattern) : pattern_(pattern), regex_(pattern) {} + + LikeHolder(const std::string& pattern, RE2::Options regex_op) + : pattern_(pattern), regex_(pattern, regex_op) {} + + std::string pattern_; // posix pattern string, to help debugging + RE2 regex_; // compiled regex for the pattern + + static RE2 starts_with_regex_; // pre-compiled pattern for matching starts_with + static RE2 ends_with_regex_; // pre-compiled pattern for matching ends_with + static RE2 is_substr_regex_; // pre-compiled pattern for matching is_substr +}; + +/// Function Holder for 'regexp_extract' function +class GANDIVA_EXPORT ExtractHolder : public FunctionHolder { + public: + ~ExtractHolder() override = default; + + static Status Make(const FunctionNode& node, std::shared_ptr<ExtractHolder>* holder); + + static Status Make(const std::string& sql_pattern, + std::shared_ptr<ExtractHolder>* holder); + + /// Extracts the matching text from a string using a regex + const char* operator()(ExecutionContext* ctx, const char* user_input, Review comment: I moved the code to the file -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
