shark.parse.QueryBlock.scala Maven / Gradle / Ivy
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/*
* Copyright (C) 2012 The Regents of The University California.
* All rights reserved.
*
* Licensed 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 shark.parse
import org.apache.hadoop.hive.ql.parse.{QB => HiveQueryBlock}
import org.apache.hadoop.hive.ql.plan.CreateTableDesc
import org.apache.hadoop.hive.ql.plan.TableDesc
import shark.memstore2.CacheType
import shark.memstore2.CacheType._
/**
* A container for flags and table metadata. Used in SharkSemanticAnalyzer while parsing
* and analyzing ASTs (e.g. in SharkSemanticAnalyzer#analyzeCreateTable()).
*/
class QueryBlock(outerID: String, alias: String, isSubQuery: Boolean)
extends HiveQueryBlock(outerID, alias, isSubQuery) {
// The CacheType for the table that will be created from CREATE TABLE/CTAS, or updated for an
// INSERT.
var cacheMode = CacheType.NONE
// Descriptor for the table being updated by an INSERT.
var targetTableDesc: TableDesc = _
// Hive's QB uses `tableDesc` to refer to the CreateTableDesc. A direct `createTableDesc`
// makes it easier to differentiate from `_targetTableDesc`.
def createTableDesc: CreateTableDesc = super.getTableDesc
def createTableDesc_= (desc: CreateTableDesc) = super.setTableDesc(desc)
}