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• package-info.java

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org.apache.drill.common.package-info Maven / Gradle / Ivy

/*
 * 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.
 */
/**
 * Logical (execution-engine-independent) element definitions.
 *
 * Drill has several representations of a query including SQL, logical plans and
 * physical plans. All of the logical constructs of Drill are separated from
 * their physical implementations in the Java execution engine. The components
 * of this package can be used to share common logical constructs between the
 * current engine and any other future alternative physical implementations of
 * the same logical constructs. This is the same for the logical expression
 * constructs defined within this package.
 *
 */
package org.apache.drill.common;