gengliangwang commented on code in PR #50253: URL: https://github.com/apache/spark/pull/50253#discussion_r2017545379
########## sql/catalyst/src/main/java/org/apache/spark/sql/connector/catalog/constraints/Check.java: ########## @@ -0,0 +1,125 @@ +/* + * 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.catalog.constraints; + +import java.util.Map; +import java.util.Objects; + +import org.apache.spark.SparkIllegalArgumentException; +import org.apache.spark.sql.connector.expressions.filter.Predicate; + +/** + * A CHECK constraint. + * <p> + * A CHECK constraint defines a condition each row in a table must satisfy. Connectors can define + * such constraints either in SQL (Spark SQL dialect) or using a {@link Predicate predicate} if the + * condition can be expressed using a supported expression. A CHECK constraint can reference one or + * more columns. Such constraint is considered violated if its condition evaluates to {@code FALSE}, + * but not {@code NULL}. The search condition must be deterministic and cannot contain subqueries + * and certain functions like aggregates or UDFs. + * + * @since 4.1.0 + */ +public class Check extends BaseConstraint { Review Comment: Shall we override the `enforced()`/`rely()`/`validationStatus()` method or variable? It will help developers to understand them. Otherwise, the default values will only exist in docs and spark internal code. -- 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: reviews-unsubscr...@spark.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org
