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| Index (Experimental Feature) |
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| An index is a data structure that is used for efficient query processing. Using an index, the Tajo query engine can directly retrieve search values. |
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| This is still an experimental feature. In order to use indexes, you must check out the source code of the ``index_support`` branch:: |
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| git clone -b index_support https://git-wip-us.apache.org/repos/asf/tajo.git tajo-index |
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| For the source code build, please refer to :doc:`getting_started`. |
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| The following sections describe the supported index types, the query execution with an index, and the future works. |
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| .. toctree:: |
| :maxdepth: 1 |
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| index/types |
| index/how_to_use |
| index/future_work |