etseidl commented on code in PR #8763: URL: https://github.com/apache/arrow-rs/pull/8763#discussion_r2483106240
########## parquet/src/file/metadata/options.rs: ########## @@ -0,0 +1,96 @@ +// 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. + +//! Options used to control metadata parsing + +use crate::schema::types::SchemaDescPtr; + +/// Options that can be set to control what parts of the Parquet file footer +/// metadata will be decoded and made present in the [`ParquetMetaData`] returned +/// by [`ParquetMetaDataReader`] and [`ParquetMetaDataPushDecoder`]. +/// +/// [`ParquetMetaData`]: crate::file::metadata::ParquetMetaData +/// [`ParquetMetaDataReader`]: crate::file::metadata::ParquetMetaDataReader +/// [`ParquetMetaDataPushDecoder`]: crate::file::metadata::ParquetMetaDataPushDecoder +#[derive(Default, Debug, Clone)] +pub struct MetadataOptions { + schema_descr: Option<SchemaDescPtr>, Review Comment: It's (1). Say you have a large number of files that share the same schema, there's no need to decode them all. Just grab the schema from the first file and use it for all the others. -- 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]
