| /* |
| * 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.iotdb.tsfile.read.expression; |
| |
| public enum ExpressionType { |
| |
| /** Represent the relationship between the left expression and the right expression is AND */ |
| AND, |
| |
| /** Represent the relationship between the left expression and the right expression is OR */ |
| OR, |
| |
| /** |
| * Represents that the expression is a leaf node in the expression tree and the type is value |
| * filtering |
| */ |
| SERIES, |
| |
| /** |
| * Represents that the expression is a leaf node in the expression tree and the type is time |
| * filtering |
| */ |
| GLOBAL_TIME, |
| |
| /** |
| * This type is used in the pruning process of expression tree in the distributed reading process. |
| * When pruning a expression tree for a data group, leaf nodes belonging to other data groups will |
| * be set to that type. |
| */ |
| TRUE |
| } |