dentiny commented on code in PR #1582: URL: https://github.com/apache/iceberg-rust/pull/1582#discussion_r2267302357
########## crates/iceberg/src/transaction/update_schema.rs: ########## @@ -0,0 +1,246 @@ +// 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 std::collections::HashSet; +use std::sync::Arc; + +use async_trait::async_trait; + +use crate::error::{Error, ErrorKind, Result}; +use crate::spec::{Schema, SchemaRef, TableMetadataBuilder}; +use crate::table::Table; +use crate::transaction::{ActionCommit, TransactionAction}; +use crate::{TableRequirement, TableUpdate}; + +/// UpdateSchemaAction is a transaction action for performing schema evolution to the table. +/// +/// TODO(hjiang): Currently only drop column is supported, need to implement a few more schema evolution operation, i.e., add columns, rename columns, change nullability, update default, etc. +pub struct UpdateSchemaAction { + /// Schema update attributes. + case_sensitive: bool, + /// Current schema before update. + schema: SchemaRef, + /// Current field ids. + identifier_field_ids: HashSet<i32>, + /// Columns to drop on the table. + deletes: HashSet<i32>, +} + +impl UpdateSchemaAction { + pub(crate) fn new(schema: SchemaRef) -> Self { + let identifier_field_ids = schema.identifier_field_ids().collect::<HashSet<i32>>(); + Self { + case_sensitive: false, + schema, + identifier_field_ids, + deletes: HashSet::new(), + } + } + + /// Set case sensitivity when updating schema by column names. + pub fn set_case_sensitivity(mut self, case_sensitivity: bool) -> Self { + self.case_sensitive = case_sensitivity; + self + } + + /// Deletes a column from a table. + /// + /// # Arguments + /// + /// * `column_name` - The path to the column. + /// + /// # Returns + /// + /// Returns the `UpdateSchema` with the delete operation staged. + pub fn delete_column(&mut self, column_name: Vec<String>) -> Result<&mut Self> { Review Comment: Gotcha, updated. Thank you! -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
