wjones127 commented on code in PR #14200: URL: https://github.com/apache/arrow/pull/14200#discussion_r977859275
########## docs/source/cpp/gandiva.rst: ########## @@ -0,0 +1,148 @@ +.. 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. + +.. default-domain:: cpp +.. highlight:: cpp +.. cpp:namespace:: arrow::compute + +=============================== +The Gandiva Expression Compiler +=============================== + +Gandiva is a runtime expression compiler that uses `LLVM`_ to generate +efficient native code for projections and filters on Arrow record batches. +Gandiva only handles projections and filters. For other transformation, see +:ref:`Compute Functions <compute-cpp>`. + +Gandiva was designed to take advantage of the Arrow memory format and modern +hardware. Compiling expressions using LLVM allows the execution to be optimized +to the local runtime environment and hardware, including available SIMD +instructions. To minimize optimization overhead, all Gandiva functions are Review Comment: I changed to "many", though I'm not sure which is right. I wrote this about a year ago, based on what I could understand from the Arrow and Dremio blog posts. But I've forgotten where I might have gotten this. -- 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]
