beliefer commented on a change in pull request #25074: [SPARK-27924][SQL] Support ANSI SQL Boolean-Predicate syntax URL: https://github.com/apache/spark/pull/25074#discussion_r304214922
########## File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/booleanExpressions.scala ########## @@ -0,0 +1,82 @@ +/* + * 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.catalyst.expressions + +import org.apache.spark.sql.AnalysisException +import org.apache.spark.sql.catalyst.InternalRow +import org.apache.spark.sql.catalyst.expressions.codegen.{CodegenContext, ExprCode} +import org.apache.spark.sql.types.BooleanType + +/** + * String to indicate which boolean test selected. + */ +object BooleanTest { + val TRUE = "TRUE" + val FALSE = "FALSE" + val UNKNOWN = "UNKNOWN" + + def calculate(input: Any, booleanValue: String): Boolean = { + booleanValue match { + case TRUE => input == true + case FALSE => input == false + case UNKNOWN => input == null + case _ => throw new AnalysisException("Boolean test value must be one of TRUE, " + + "FALSE and UNKNOWN.") + } + } +} + +/** + * Test the value of an expression is true, false, or unknown. + */ +@ExpressionDescription( + usage = "_FUNC_(expr, booleanValue) - Returns true if `expr` equals booleanValue, " + + "or false otherwise.", + arguments = """ + Arguments: + * expr - a boolean expression + * booleanValue - a boolean value represented by a string. booleanValue must be one + of TRUE, FALSE and UNKNOWN. + """, + examples = """ + Examples: + > SELECT _FUNC_(1 > 2, true); + false + > SELECT _FUNC_(2 > 1, true); + true + """) Review comment: OK. ---------------------------------------------------------------- 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: us...@infra.apache.org With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org
