vvysotskyi commented on a change in pull request #1940: DRILL-7406: Update Calcite to 1.21.0 URL: https://github.com/apache/drill/pull/1940#discussion_r361667498
########## File path: exec/java-exec/src/main/java/org/apache/drill/exec/planner/sql/conversion/DrillCalciteCatalogReader.java ########## @@ -0,0 +1,213 @@ +/* + * 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.drill.exec.planner.sql.conversion; + +import java.util.ArrayList; +import java.util.List; +import java.util.Properties; +import java.util.function.BooleanSupplier; +import java.util.function.Supplier; + +import org.apache.calcite.adapter.java.JavaTypeFactory; +import org.apache.calcite.config.CalciteConnectionConfigImpl; +import org.apache.calcite.config.CalciteConnectionProperty; +import org.apache.calcite.jdbc.CalciteSchema; +import org.apache.calcite.jdbc.DynamicSchema; +import org.apache.calcite.prepare.CalciteCatalogReader; +import org.apache.calcite.prepare.Prepare; +import org.apache.calcite.schema.SchemaPlus; +import org.apache.calcite.sql.validate.SqlValidatorUtil; +import org.apache.calcite.util.Util; +import org.apache.drill.common.config.DrillConfig; +import org.apache.drill.common.exceptions.UserException; +import org.apache.drill.exec.metastore.MetadataProviderManager; +import org.apache.drill.exec.planner.logical.DrillTable; +import org.apache.drill.exec.planner.sql.SchemaUtilites; +import org.apache.drill.exec.rpc.user.UserSession; +import org.apache.drill.exec.store.dfs.FileSelection; +import org.apache.drill.shaded.guava.com.google.common.cache.CacheBuilder; +import org.apache.drill.shaded.guava.com.google.common.cache.CacheLoader; +import org.apache.drill.shaded.guava.com.google.common.cache.LoadingCache; +import org.apache.drill.shaded.guava.com.google.common.collect.ImmutableList; + +/** + * Extension of {@link CalciteCatalogReader} to add ability to check for temporary tables first + * if schema is not indicated near table name during query parsing + * or indicated workspace is default temporary workspace. + */ +class DrillCalciteCatalogReader extends CalciteCatalogReader { + + private final DrillConfig drillConfig; + private final UserSession session; + private final String temporarySchema; + private boolean allowTemporaryTables; + private final BooleanSupplier useRootSchema; + private final Supplier<SchemaPlus> defaultSchemaSupplier; + + private final LoadingCache<DrillTableKey, MetadataProviderManager> tableCache; + + DrillCalciteCatalogReader(SchemaPlus rootSchema, + boolean caseSensitive, + List<String> defaultSchema, + JavaTypeFactory typeFactory, + DrillConfig drillConfig, + UserSession session, + String temporarySchema, + BooleanSupplier useRootSchema, + Supplier<SchemaPlus> defaultSchemaSupplier) { + super(DynamicSchema.from(rootSchema), defaultSchema, + typeFactory, getConnectionConfig(caseSensitive)); + this.drillConfig = drillConfig; + this.session = session; + this.allowTemporaryTables = true; + this.tableCache = + CacheBuilder.newBuilder() + .build(new CacheLoader<DrillTableKey, MetadataProviderManager>() { + @Override + public MetadataProviderManager load(DrillTableKey key) { + return key.getMetadataProviderManager(); + } + }); + this.temporarySchema = temporarySchema; + this.useRootSchema = useRootSchema; + this.defaultSchemaSupplier = defaultSchemaSupplier; + } + + /** + * Disallow temporary tables presence in sql statement (ex: in view definitions) + */ + void disallowTemporaryTables() { + this.allowTemporaryTables = false; + } + + List<String> getTemporaryNames(List<String> names) { + if (mightBeTemporaryTable(names, session.getDefaultSchemaPath(), drillConfig)) { + String tableName = FileSelection.removeLeadingSlash(names.get(names.size() - 1)); + String temporaryTableName = session.resolveTemporaryTableName(tableName); + if (temporaryTableName != null) { + List<String> temporaryNames = new ArrayList<>(SchemaUtilites.getSchemaPathAsList(temporarySchema)); + temporaryNames.add(temporaryTableName); + return temporaryNames; + } + } + return null; + } + + /** + * If schema is not indicated (only one element in the list) or schema is default temporary workspace, + * we need to check among session temporary tables in default temporary workspace first. + * If temporary table is found and temporary tables usage is allowed, its table instance will be returned, + * otherwise search will be conducted in original workspace. + * + * @param names list of schema and table names, table name is always the last element + * @return table instance, null otherwise + * @throws UserException if temporary tables usage is disallowed + */ + @Override + public Prepare.PreparingTable getTable(List<String> names) { + checkIfWeCanProceedForTemporaryTable(names); + Prepare.PreparingTable table = super.getTable(names); + DrillTable drillTable; + if (table != null && (drillTable = table.unwrap(DrillTable.class)) != null) { + drillTable.setOptions(session.getOptions()); + drillTable.setTableMetadataProviderManager(tableCache.getUnchecked(DrillTableKey.of(names, drillTable))); + } + return table; + } + + private void checkIfWeCanProceedForTemporaryTable(List<String> names) { + String originalTableName; + if (!allowTemporaryTables && + (originalTableName = session.getOriginalTableNameFromTemporaryTable(names.get(names.size() - 1))) != null) { Review comment: Please extract assigning for the condition. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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