| /* |
| * 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.tajo.plan; |
| |
| import org.apache.tajo.OverridableConf; |
| import org.apache.tajo.SessionVars; |
| import org.apache.tajo.catalog.TableMeta; |
| import org.apache.tajo.conf.TajoConf; |
| import org.apache.tajo.plan.logical.CreateTableNode; |
| import org.apache.tajo.plan.logical.ScanNode; |
| import org.apache.tajo.storage.StorageConstants; |
| import org.apache.tajo.util.KeyValueSet; |
| |
| /** |
| * An utility class for table property |
| */ |
| public class TablePropertyUtil { |
| /** |
| * It sets default table property for newly created table |
| * |
| * @param context QueryContext |
| * @param node CreateTableNode |
| */ |
| public static void setTableProperty(OverridableConf context, CreateTableNode node) { |
| String dataFormat = node.getStorageType(); |
| KeyValueSet property = node.getOptions(); |
| |
| if (dataFormat.equalsIgnoreCase("TEXT") || dataFormat.equalsIgnoreCase("TEXT")) { |
| setSessionToProperty(context, SessionVars.NULL_CHAR, property, StorageConstants.TEXT_NULL); |
| } |
| } |
| |
| private static void setSessionToProperty(OverridableConf context, |
| SessionVars sessionVarKey, |
| KeyValueSet property, |
| String propertyKey) { |
| |
| if (context.containsKey(sessionVarKey)) { |
| property.set(propertyKey, context.get(sessionVarKey)); |
| } |
| } |
| |
| /** |
| * It sets default table properties affected by system global configuration |
| * The table property are implicitly used to read Table rows. |
| * |
| * @param context QueryContext |
| * @param node ScanNode |
| */ |
| public static void setTableProperty(OverridableConf context, ScanNode node) { |
| TableMeta meta = node.getTableDesc().getMeta(); |
| |
| // set default time zone, if there is no table timezone |
| setProperty(context.getConf(), TajoConf.ConfVars.$TIMEZONE, meta, StorageConstants.TIMEZONE); |
| } |
| |
| /** |
| * If there is no table property for the propertyKey, set default property to the table. |
| * If session variable is set, it is set to the table property. Otherwise, the default property |
| * in the system conf will be used. |
| * |
| * @param context QueryContext |
| * @param sessionVarKey session variable key |
| * @param meta TableMeta |
| * @param propertyKey table property key |
| */ |
| private static void setProperty(OverridableConf context, SessionVars sessionVarKey, |
| TableMeta meta, String propertyKey) { |
| |
| if (!meta.containsProperty(propertyKey)) { |
| meta.putProperty(propertyKey, context.get(sessionVarKey)); |
| } |
| } |
| |
| /** |
| * If there is no table property for the propertyKey, set default property from system conf to the table. |
| * |
| * @param conf TajoConf |
| * @param confVarKey system variable key |
| * @param meta TableMeta |
| * @param propertyKey table property key |
| */ |
| private static void setProperty(TajoConf conf, TajoConf.ConfVars confVarKey, |
| TableMeta meta, String propertyKey) { |
| |
| if (!meta.containsProperty(propertyKey)) { |
| meta.putProperty(propertyKey, conf.getVar(confVarKey)); |
| } |
| } |
| } |