cloud-fan commented on code in PR #52578: URL: https://github.com/apache/spark/pull/52578#discussion_r2426132432
########## sql/catalyst/src/main/java/org/apache/spark/sql/connector/read/VariantAccessInfo.java: ########## @@ -0,0 +1,105 @@ +/* + * 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.spark.sql.connector.read; + +import java.io.Serializable; +import java.util.Objects; + +import org.apache.spark.annotation.Evolving; +import org.apache.spark.sql.types.StructType; + +/** + * Variant access information that describes how variant fields are accessed in a query. + * <p> + * This class captures the information needed by data sources to optimize reading variant columns. + * Instead of reading the entire variant value, the data source can read only the fields that + * are actually accessed, represented as a structured schema. + * <p> + * For example, if a query accesses `variant_get(v, '$.a', 'int')` and + * `variant_get(v, '$.b', 'string')`, the extracted schema would be + * `struct<0:int, 1:string>` where field ordinals correspond to the access order. Review Comment: ```suggestion * `struct<a:int, b:string>` where field ordinals correspond to the access order. ``` -- 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]
