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Support PostgreSQL/openGauss create view, alter view and drop view st…
…atements with single table (#16771)
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...apache/shardingsphere/infra/context/refresher/type/AlterViewStatementSchemaRefresher.java
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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. | ||
| */ | ||
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| package org.apache.shardingsphere.infra.context.refresher.type; | ||
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| import org.apache.shardingsphere.infra.config.props.ConfigurationProperties; | ||
| import org.apache.shardingsphere.infra.context.refresher.MetaDataRefresher; | ||
| import org.apache.shardingsphere.infra.eventbus.ShardingSphereEventBus; | ||
| import org.apache.shardingsphere.infra.federation.optimizer.context.planner.OptimizerPlannerContext; | ||
| import org.apache.shardingsphere.infra.federation.optimizer.context.planner.OptimizerPlannerContextFactory; | ||
| import org.apache.shardingsphere.infra.federation.optimizer.metadata.FederationDatabaseMetaData; | ||
| import org.apache.shardingsphere.infra.metadata.ShardingSphereMetaData; | ||
| import org.apache.shardingsphere.infra.metadata.schema.builder.SchemaBuilderMaterials; | ||
| import org.apache.shardingsphere.infra.metadata.schema.builder.TableMetaDataBuilder; | ||
| import org.apache.shardingsphere.infra.metadata.schema.event.SchemaAlteredEvent; | ||
| import org.apache.shardingsphere.infra.metadata.schema.model.TableMetaData; | ||
| import org.apache.shardingsphere.infra.rule.identifier.type.DataNodeContainedRule; | ||
| import org.apache.shardingsphere.infra.rule.identifier.type.MutableDataNodeRule; | ||
| import org.apache.shardingsphere.sql.parser.sql.common.segment.generic.table.SimpleTableSegment; | ||
| import org.apache.shardingsphere.sql.parser.sql.common.statement.ddl.AlterViewStatement; | ||
| import org.apache.shardingsphere.sql.parser.sql.dialect.handler.ddl.AlterViewStatementHandler; | ||
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| import java.sql.SQLException; | ||
| import java.util.Collection; | ||
| import java.util.Collections; | ||
| import java.util.Map; | ||
| import java.util.Optional; | ||
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| /** | ||
| * Schema refresher for alter view statement. | ||
| */ | ||
| public final class AlterViewStatementSchemaRefresher implements MetaDataRefresher<AlterViewStatement> { | ||
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| private static final String TYPE = AlterViewStatement.class.getName(); | ||
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| @Override | ||
| public void refresh(final ShardingSphereMetaData schemaMetaData, final FederationDatabaseMetaData database, final Map<String, OptimizerPlannerContext> optimizerPlanners, | ||
| final Collection<String> logicDataSourceNames, final AlterViewStatement sqlStatement, final ConfigurationProperties props) throws SQLException { | ||
| String viewName = sqlStatement.getView().getTableName().getIdentifier().getValue(); | ||
| SchemaAlteredEvent event = new SchemaAlteredEvent(schemaMetaData.getName()); | ||
| Optional<SimpleTableSegment> renameView = AlterViewStatementHandler.getRenameView(sqlStatement); | ||
| if (renameView.isPresent()) { | ||
| String renameViewName = renameView.get().getTableName().getIdentifier().getValue(); | ||
| putTableMetaData(schemaMetaData, database, optimizerPlanners, logicDataSourceNames, renameViewName, props); | ||
| removeTableMetaData(schemaMetaData, database, optimizerPlanners, viewName); | ||
| event.getAlteredTables().add(schemaMetaData.getDefaultSchema().get(renameViewName)); | ||
| event.getDroppedTables().add(viewName); | ||
| } else { | ||
| putTableMetaData(schemaMetaData, database, optimizerPlanners, logicDataSourceNames, viewName, props); | ||
| event.getAlteredTables().add(schemaMetaData.getDefaultSchema().get(viewName)); | ||
| } | ||
| ShardingSphereEventBus.getInstance().post(event); | ||
| } | ||
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| private void removeTableMetaData(final ShardingSphereMetaData schemaMetaData, final FederationDatabaseMetaData database, | ||
| final Map<String, OptimizerPlannerContext> optimizerPlanners, final String viewName) { | ||
| schemaMetaData.getDefaultSchema().remove(viewName); | ||
| schemaMetaData.getRuleMetaData().findRules(MutableDataNodeRule.class).forEach(each -> each.remove(viewName)); | ||
| database.remove(viewName); | ||
| optimizerPlanners.put(database.getName(), OptimizerPlannerContextFactory.create(database)); | ||
| } | ||
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| private void putTableMetaData(final ShardingSphereMetaData schemaMetaData, final FederationDatabaseMetaData database, final Map<String, OptimizerPlannerContext> optimizerPlanners, | ||
| final Collection<String> logicDataSourceNames, final String viewName, final ConfigurationProperties props) throws SQLException { | ||
| if (!containsInDataNodeContainedRule(viewName, schemaMetaData)) { | ||
| schemaMetaData.getRuleMetaData().findRules(MutableDataNodeRule.class).forEach(each -> each.put(viewName, logicDataSourceNames.iterator().next())); | ||
| } | ||
| SchemaBuilderMaterials materials = new SchemaBuilderMaterials( | ||
| schemaMetaData.getResource().getDatabaseType(), schemaMetaData.getResource().getDataSources(), schemaMetaData.getRuleMetaData().getRules(), props); | ||
| Optional<TableMetaData> actualViewMetaData = Optional.ofNullable(TableMetaDataBuilder.load(Collections.singletonList(viewName), materials).get(viewName)); | ||
| actualViewMetaData.ifPresent(viewMetaData -> { | ||
| schemaMetaData.getDefaultSchema().put(viewName, viewMetaData); | ||
| database.put(viewMetaData); | ||
| optimizerPlanners.put(database.getName(), OptimizerPlannerContextFactory.create(database)); | ||
| }); | ||
| } | ||
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| private boolean containsInDataNodeContainedRule(final String viewName, final ShardingSphereMetaData schemaMetaData) { | ||
| return schemaMetaData.getRuleMetaData().findRules(DataNodeContainedRule.class).stream().anyMatch(each -> each.getAllTables().contains(viewName)); | ||
| } | ||
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| @Override | ||
| public String getType() { | ||
| return TYPE; | ||
| } | ||
| } |
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