/
TreePatterns.scala
33 lines (29 loc) · 1.25 KB
/
TreePatterns.scala
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/*
* 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.trees
// Enums for commonly encountered tree patterns in rewrite rules.
object TreePattern extends Enumeration {
type TreePattern = Value
// Enum Ids start from 0.
// Expression patterns (alphabetically ordered)
val IN: Value = Value(0)
// Logical plan patterns (alphabetically ordered)
val INNER_LIKE_JOIN: Value = Value
val JOIN: Value = Value
val LEFT_SEMI_OR_ANTI_JOIN: Value = Value
val OUTER_JOIN: Value = Value
}