rdblue commented on a change in pull request #1759: URL: https://github.com/apache/iceberg/pull/1759#discussion_r523161790
########## File path: spark3/src/main/java/org/apache/iceberg/spark/procedures/RollbackToSnapshotProcedure.java ########## @@ -0,0 +1,98 @@ +/* + * 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. + */ + +package org.apache.iceberg.spark.procedures; + +import org.apache.iceberg.Snapshot; +import org.apache.iceberg.spark.procedures.SparkProcedures.ProcedureBuilder; +import org.apache.spark.sql.catalyst.InternalRow; +import org.apache.spark.sql.catalyst.expressions.GenericInternalRow; +import org.apache.spark.sql.connector.catalog.TableCatalog; +import org.apache.spark.sql.connector.iceberg.catalog.ProcedureParameter; +import org.apache.spark.sql.types.DataTypes; +import org.apache.spark.sql.types.Metadata; +import org.apache.spark.sql.types.StructField; +import org.apache.spark.sql.types.StructType; + +/** + * A procedure that rollbacks a table to a specific snapshot id. + */ +class RollbackToSnapshotProcedure extends BaseProcedure { + + private static final ProcedureParameter[] PARAMETERS = new ProcedureParameter[]{ + ProcedureParameter.required("namespace", DataTypes.StringType), + ProcedureParameter.required("table", DataTypes.StringType), + ProcedureParameter.required("snapshot_id", DataTypes.LongType) + }; + + private static final StructType OUTPUT_TYPE = new StructType(new StructField[]{ + new StructField("previous_snapshot_id", DataTypes.LongType, false, Metadata.empty()), + new StructField("current_snapshot_id", DataTypes.LongType, false, Metadata.empty()) + }); + + public static ProcedureBuilder builder() { + return new BaseProcedure.Builder<RollbackToSnapshotProcedure>() { + @Override + public RollbackToSnapshotProcedure doBuild() { + return new RollbackToSnapshotProcedure(tableCatalog()); + } + }; + } + + private RollbackToSnapshotProcedure(TableCatalog tableCatalog) { + super(tableCatalog); + } + + @Override + public ProcedureParameter[] parameters() { + return PARAMETERS; + } + + @Override + public StructType outputType() { + return OUTPUT_TYPE; + } + + @Override + public InternalRow[] call(InternalRow args) { + String namespace = args.getString(0); + String tableName = args.getString(1); + long snapshotId = args.getLong(2); + + return modifyIcebergTable(namespace, tableName, table -> { + Snapshot previousSnapshot = table.currentSnapshot(); Review comment: We can add a validation to set `requiredCurrentSnapshotId` in the operation. Right now, we always roll back as long as it is an ancestor of the current state. Can be done as a follow-up though. ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
