| |
| //// |
| 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. |
| //// |
| |
| |
| |
| Schema Definition in Hive |
| ~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| Hive users will note that there is not a one-to-one mapping between |
| SQL types and Hive types. In general, SQL types that do not have a |
| direct mapping (for example, +DATE+, +TIME+, and +TIMESTAMP+) will be coerced to |
| +STRING+ in Hive. The +NUMERIC+ and +DECIMAL+ SQL types will be coerced to |
| +DOUBLE+. In these cases, Sqoop will emit a warning in its log messages |
| informing you of the loss of precision. |
| |
| Parquet Support in Hive |
| ~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| In order to contact the Hive MetaStore from a MapReduce job, a delegation token will |
| be fetched and passed. HIVE_CONF_DIR and HIVE_HOME must be set appropriately to add |
| Hive to the runtime classpath. Otherwise, importing/exporting into Hive in Parquet |
| format may not work. |
