Difference between revisions of "Semantic MediaWiki/data/smw di wikipage"
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(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") |
(→relationships: improved query) |
||
| Line 32: | Line 32: | ||
</syntaxhighlight> | </syntaxhighlight> | ||
====relationships==== | ====relationships==== | ||
| − | < | + | <source lang=mysql> |
| − | SELECT s_id | + | SELECT |
| − | , s.smw_namespace AS | + | s_id |
| + | , s.smw_namespace AS s_ns | ||
, CAST(s.smw_title AS char) AS s_title | , CAST(s.smw_title AS char) AS s_title | ||
| − | , p.smw_namespace AS | + | , p_id |
| + | , p.smw_namespace AS p_ns | ||
, CAST(p.smw_title AS char) AS p_title | , CAST(p.smw_title AS char) AS p_title | ||
| − | , o.smw_namespace AS | + | , o_id |
| + | , o.smw_namespace AS o_ns | ||
, CAST(o.smw_title AS char) AS o_title | , CAST(o.smw_title AS char) AS o_title | ||
FROM | FROM | ||
| Line 45: | Line 48: | ||
LEFT JOIN smw_object_ids AS p ON r.p_id=p.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 | LEFT JOIN smw_object_ids AS o ON r.o_id=o.smw_id | ||
| − | ORDER BY s_id, p_title, o_title | + | ORDER BY s.smw_title, s_id, p_title, o_title</source> |
| − | </ | ||
* 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) | * 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) | ||
Latest revision as of 21:11, 9 July 2020
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
, s.smw_namespace AS s_ns
, CAST(s.smw_title AS char) AS s_title
, p_id
, p.smw_namespace AS p_ns
, CAST(p.smw_title AS char) AS p_title
, o_id
, o.smw_namespace AS o_ns
, 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.smw_title, 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)