Difference between revisions of "Semantic MediaWiki/data/smw di wikipage"

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(simple example)
(wrong table for "simple", and anyway this one has to be a join if we want to look up values, so let's call it "values")
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</syntaxhighlight>
 
</syntaxhighlight>
 
===Example===
 
===Example===
−
====simple====
+
====values====
 
<syntaxhighlight lang=mysql>
 
<syntaxhighlight lang=mysql>
 
SELECT  
 
SELECT  
−
     smw_id,
+
     s_id,
−
     smw_namespace,
+
     p_id,
−
     CAST(smw_title AS CHAR) AS title,
+
     o_id,
−
     CAST(smw_iw AS CHAR) AS iw,
+
     o.smw_namespace AS o_namespace,
−
     CAST(smw_subobject AS CHAR) AS subobject,
+
     CAST(o.smw_title AS CHAR) AS o_title
−
    CAST(smw_sortkey AS CHAR) AS sortkey,
 
−
    CAST(smw_proptable_hash AS CHAR) AS proptable_hash
 
 
FROM
 
FROM
−
     smw_object_ids;
+
    smw_di_wikipage AS r
 +
        LEFT JOIN
 +
     smw_object_ids AS o ON r.o_id = o.smw_id;
 
</syntaxhighlight>
 
</syntaxhighlight>
 
====relationships====
 
====relationships====

Revision as of 11:11, 2 February 2018

About

  • Purpose: specifications for all SMW Objects where the value is a possible wiki page title (existing or not)
  • Refers to: smw_object_ids

Fields

  • p_id: page on which the property appears
  • s_id: page for property name
  • o_od: page for property value

SQL

CREATE TABLE `smw_di_wikipage` (
  `s_id` int(8) unsigned NOT NULL,
  `p_id` int(8) unsigned NOT NULL,
  `o_id` int(8) unsigned DEFAULT NULL,
  KEY `s_id` (`s_id`,`p_id`),
  KEY `p_id` (`p_id`,`o_id`),
  KEY `o_id` (`o_id`)
) ENGINE=InnoDB DEFAULT CHARSET=binary

Example

values

SELECT 
    s_id,
    p_id,
    o_id,
    o.smw_namespace AS o_namespace,
    CAST(o.smw_title AS CHAR) AS o_title
FROM
    smw_di_wikipage AS r
        LEFT JOIN
    smw_object_ids AS o ON r.o_id = o.smw_id;

relationships

SELECT s_id,p_id,o_id
  , s.smw_namespace AS s_namespace
  , CAST(s.smw_title AS char) AS s_title
  , p.smw_namespace AS p_namespace
  , CAST(p.smw_title AS char) AS p_title
  , o.smw_namespace AS o_namespace
  , CAST(o.smw_title AS char) AS o_title
  FROM
    ((smw_di_wikipage AS r
    LEFT JOIN smw_object_ids AS s ON r.s_id=s.smw_id)
    LEFT JOIN smw_object_ids AS p ON r.p_id=p.smw_id)
    LEFT JOIN smw_object_ids AS o ON r.o_id=o.smw_id
ORDER BY s_id, p_title, o_title
  • p_namespace will probably always be the "property:" namespace, which defaults to 102 (unless there's some way to use a page outside that namespace as a property)
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