Kouhei Sutou
null+****@clear*****
Sun Mar 9 23:36:25 JST 2014
Kouhei Sutou 2014-03-09 23:36:25 +0900 (Sun, 09 Mar 2014) New Revision: acbbbf5f139f9782d3bba5f56b705b5c84c25733 https://github.com/groonga/groonga/commit/acbbbf5f139f9782d3bba5f56b705b5c84c25733 Message: doc: start to write vector column document Added files: doc/source/reference/columns/vector.test Added: doc/source/reference/columns/vector.test (+62 -0) 100644 =================================================================== --- /dev/null +++ doc/source/reference/columns/vector.test 2014-03-09 23:36:25 +0900 (547862d) @@ -0,0 +1,62 @@ +.. -*- rst -*- + +.. highlightlang:: none + +.. groonga-command +.. database: columns_vector + +Vector column +============= + +Summary +------- + +Vector column is a data store object. It can stores zero or more +scalar values. In short, scalar value is a single value such as number +and string. See :doc:`scalar` about scalar value details. + +One of vector column use cases is tags store. You can use a vector +column to store tag values. + +You can use vector column as index search target in the same way as +scalar column. You can set weight for each element. The element that +has one or more weight is matched, the record has more score rather +than no weight case. It is a vector column specific feature. Vector +column that can store weight is called weight vector column. + +You can also do full text search against each text element. But search +score is too high when weight is used. You should use full text search +with weight carefully. + +Usage +----- + +Here is a schema definition to show usage: + +.. groonga-command +.. include:: ../../example/reference/columns/vector/usage_setup.log +.. table_create Bookmarks TABLE_HASH_KEY ShortText + +This section describes the followings: + + * How to create a normal vector column + * How to load data to a normal vector column + * How to search elements in a normal vector column + * How to implement tag search + * How to create a weight vector column + * How to load data to a weight vector column + * How to search elements in a weight vector column + +How to create a normal vector column +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Use :doc:`/reference/commands/column_create` command to create a +normal vector column. The point is ``COLUMN_VECTOR`` flag: + +.. groonga-command +.. include:: ../../example/reference/columns/vector/usage_create_normal_column.log +.. column_create Bookmarks tags COLUMN_VECTOR ShortText + +You can set zero or more tags to a bookmark. + +You can use a table as column type: -------------- next part -------------- HTML����������������������������...ダウンロード
