cloud-fan commented on code in PR #53158: URL: https://github.com/apache/spark/pull/53158#discussion_r2590304820
########## sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Measure.scala: ########## @@ -0,0 +1,60 @@ +/* + * 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.aggregate + +import org.apache.spark.sql.catalyst.analysis.FunctionRegistry +import org.apache.spark.sql.catalyst.expressions.{ExpectsInputTypes, Expression, ExpressionDescription, UnevaluableAggregateFunc} +import org.apache.spark.sql.catalyst.trees.TreePattern.{MEASURE, TreePattern} +import org.apache.spark.sql.catalyst.trees.UnaryLike +import org.apache.spark.sql.types.{AbstractDataType, AnyDataType, DataType} + +// This function serves as an annotation to tell the analyzer to calculate +// the measures defined in metric views. It cannot be evaluated in execution phase +// and instead it'll be replaced to the actual aggregate functions defined by +// the measure (as input argument). +// scalastyle:off line.size.limit +@ExpressionDescription( + usage = "_FUNC_(expr) - this function is used and can only be used to calculate a measure defined in a metric view.", + examples = """ + Examples: + > SELECT dimension_col, _FUNC_(measure_col) + FROM test_metric_view + GROUP BY dimension_col; + dim_1, 100 + dim_2, 200 + """, + group = "agg_funcs", + since = "4.0.0") Review Comment: ```suggestion since = "4.2.0") ``` -- 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]
