| // 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.impala.analysis; |
| |
| import java.util.List; |
| |
| import org.apache.impala.authorization.Privilege; |
| import org.apache.impala.catalog.FeFsTable; |
| import org.apache.impala.catalog.FeKuduTable; |
| import org.apache.impala.catalog.FeTable; |
| import org.apache.impala.catalog.FeView; |
| import org.apache.impala.common.AnalysisException; |
| import org.apache.impala.thrift.TShowStatsOp; |
| import org.apache.impala.thrift.TShowStatsParams; |
| |
| import com.google.common.base.Preconditions; |
| |
| /** |
| * Representation of a SHOW TABLE/COLUMN STATS statement for |
| * displaying column and table/partition statistics for a given table. |
| */ |
| public class ShowStatsStmt extends StatementBase { |
| protected final TShowStatsOp op_; |
| protected final TableName tableName_; |
| |
| // Set during analysis. |
| protected FeTable table_; |
| |
| public ShowStatsStmt(TableName tableName, TShowStatsOp op) { |
| op_ = Preconditions.checkNotNull(op); |
| tableName_ = Preconditions.checkNotNull(tableName); |
| } |
| |
| @Override |
| public String toSql(ToSqlOptions options) { |
| return getSqlPrefix() + " " + tableName_.toString(); |
| } |
| |
| protected String getSqlPrefix() { |
| if (op_ == TShowStatsOp.TABLE_STATS) { |
| return "SHOW TABLE STATS"; |
| } else if (op_ == TShowStatsOp.COLUMN_STATS) { |
| return "SHOW COLUMN STATS"; |
| } else if (op_ == TShowStatsOp.PARTITIONS) { |
| return "SHOW PARTITIONS"; |
| } else if (op_ == TShowStatsOp.RANGE_PARTITIONS) { |
| return "SHOW RANGE PARTITIONS"; |
| } else { |
| Preconditions.checkState(false); |
| return ""; |
| } |
| } |
| |
| @Override |
| public void collectTableRefs(List<TableRef> tblRefs) { |
| tblRefs.add(new TableRef(tableName_.toPath(), null)); |
| } |
| |
| @Override |
| public void analyze(Analyzer analyzer) throws AnalysisException { |
| table_ = analyzer.getTable(tableName_, Privilege.VIEW_METADATA); |
| Preconditions.checkNotNull(table_); |
| if (table_ instanceof FeView) { |
| throw new AnalysisException(String.format( |
| "%s not applicable to a view: %s", getSqlPrefix(), table_.getFullName())); |
| } |
| if (table_ instanceof FeFsTable) { |
| if (table_.getNumClusteringCols() == 0 && op_ == TShowStatsOp.PARTITIONS) { |
| throw new AnalysisException("Table is not partitioned: " + table_.getFullName()); |
| } |
| if (op_ == TShowStatsOp.RANGE_PARTITIONS) { |
| throw new AnalysisException(getSqlPrefix() + " must target a Kudu table: " + |
| table_.getFullName()); |
| } |
| } else if (table_ instanceof FeKuduTable) { |
| FeKuduTable kuduTable = (FeKuduTable) table_; |
| if (op_ == TShowStatsOp.RANGE_PARTITIONS && |
| FeKuduTable.Utils.getRangePartitioningColNames(kuduTable).isEmpty()) { |
| throw new AnalysisException(getSqlPrefix() + " requested but table does not " + |
| "have range partitions: " + table_.getFullName()); |
| } |
| } else { |
| if (op_ == TShowStatsOp.RANGE_PARTITIONS) { |
| throw new AnalysisException(getSqlPrefix() + " must target a Kudu table: " + |
| table_.getFullName()); |
| } else if (op_ == TShowStatsOp.PARTITIONS) { |
| throw new AnalysisException(getSqlPrefix() + " must target an HDFS table: " + |
| table_.getFullName()); |
| } |
| } |
| } |
| |
| public TShowStatsParams toThrift() { |
| // Ensure the DB is set in the table_name field by using table and not tableName. |
| return new TShowStatsParams(op_, |
| new TableName(table_.getDb().getName(), table_.getName()).toThrift()); |
| } |
| } |