[英]How do I build a UNION query with ORDER BY and GROUP BY in Kohana's query builder?
我正在尝试使用Kohana的查询构建器构建 UNION查询。 一切正常,直到我添加GROUP BY或ORDER BY子句。
这是我正在使用的代码(简化):
$query1 = DB::select('p.name')
->from(array('person', 'p'))
->where('p.organization', 'LIKE', 'foo%')
->limit(10);
$names = DB::select('sh.name')
->union($query1, FALSE)
->from(array('stakeholder', 'sh'))
->where('sh.organization', 'LIKE', 'foo%')
->group_by('name')
->order_by('name')
->limit(10)
->execute()
->as_array();
它不是在整个查询结束时添加GROUP BY和ORDER BY,而是在第二个查询之后立即添加它。
这是生成的SQL:
SELECT sh.name FROM stakeholder AS sh WHERE sh.organization LIKE 'foo%'
GROUP BY name ORDER BY name LIMIT 10
UNION
SELECT p.name from person AS p WHERE p.organization LIKE 'foo%' LIMIT 10;
我想要的是:
SELECT sh.name FROM stakeholder AS sh WHERE sh.organization LIKE 'foo%'
UNION
SELECT p.name from person AS p WHERE p.organization LIKE 'foo%'
GROUP BY name ORDER BY name LIMIT 10;
这里的子句是从union()
方法中设置的第一个查询中应用的,所以只需反转你放置它们的位置:
$query1 = DB::select('p.name')
->from(array('person', 'p'))
->where('p.organization', 'LIKE', 'foo%')
->group_by('name')
->order_by('name')
->limit(10);
$names = DB::select('sh.name')
->union($query1, FALSE)
->from(array('stakeholder', 'sh'))
->where('sh.organization', 'LIKE', 'foo%')
->execute()
->as_array();
您还可以从$names
删除多余的->limit(10)
,因为它将被忽略并被$query1
的一个取代。
2011年的答案在Kohana 3.3中无效。
但我找到了这个模块: https : //github.com/Invision70/kohana-orm-union
您还可以使用ORM的db_pending来扩展Kohana_ORM:
class ORM extends Kohana_ORM {
public function union($table, $all = TRUE)
{
// Add pending database call which is executed after query type is determined
$this->_db_pending[] = array(
'name' => 'union',
'args' => array($table, $all),
);
return $this;
}
}
用法:
ORM::factory('MyModel')
->union(DB::select(DB::expr("'RP' id, 'Pasantías' name, 'Pasantías' short_name, 'R' parent_id, null data")))
->union(DB::select(DB::expr("'RC' id, 'Capacitación' name, 'Capacitación' short_name, 'R' parent_id, null data")))
->join(['catalogo', 'p'])->on('catalogo.parent_id', '=', 'p.id')
->where('p.parent_id', 'is', NULL)
->where('catalogo.id', 'not in', ['RV', 'RPA', 'RPT']);
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