| // 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 org.apache.impala.thrift.TSetQueryOptionRequest; |
| |
| import com.google.common.base.Preconditions; |
| |
| /** |
| * Representation of a SET query options statement. |
| */ |
| public class SetStmt extends StatementBase { |
| private final String key_; |
| private final String value_; |
| private final boolean isSetAll_; |
| |
| // This key is deprecated in Impala 2.0; COMPRESSION_CODEC_KEY replaces this |
| private static final String DEPRECATED_PARQUET_CODEC_KEY = "PARQUET_COMPRESSION_CODEC"; |
| private static final String COMPRESSION_CODEC_KEY = "COMPRESSION_CODEC"; |
| |
| // maps the given key name to a key defined in the thrift file |
| private static String resolveThriftKey(String key) { |
| if (key.toLowerCase().equals(DEPRECATED_PARQUET_CODEC_KEY.toLowerCase())) { |
| return COMPRESSION_CODEC_KEY; |
| } |
| return key; |
| } |
| |
| public SetStmt(String key, String value, boolean isSetAll) { |
| Preconditions.checkArgument((key == null) == (value == null)); |
| Preconditions.checkArgument(key == null || !key.isEmpty()); |
| Preconditions.checkArgument(!isSetAll || (key == null && value == null) ); |
| key_ = key; |
| value_ = value; |
| isSetAll_ = isSetAll; |
| } |
| |
| @Override |
| public String toSql(ToSqlOptions options) { |
| if (key_ == null) { |
| if (isSetAll_) return "SET ALL"; |
| return "SET"; |
| } |
| Preconditions.checkNotNull(value_); |
| return "SET " + ToSqlUtils.getIdentSql(key_) + "='" + value_ + "'"; |
| } |
| |
| @Override |
| public void analyze(Analyzer analyzer) { |
| // Query option key is validated by the backend. |
| } |
| |
| public TSetQueryOptionRequest toThrift() { |
| TSetQueryOptionRequest request = new TSetQueryOptionRequest(); |
| if (key_ != null) { |
| request.setKey(resolveThriftKey(key_)); |
| request.setValue(value_); |
| } |
| if (isSetAll_) request.setIs_set_all(true); |
| return request; |
| } |
| } |