这个查询给我带来了很多麻烦:
/* Looking for a machine already attributed to a site:
* - Date_started is in the given period
* OR - Date_ended is in the giver period
* OR - Date_started is before the period's end AND date_ended is null
* AND - Que l'on parle de la même machine
*/
$dsql = $tmp->_dsql();
$machine = $tmp->selectQuery(array('site'))
->where($dsql->andExpr()
->where($dsql->orExpr()
->where('date_started BETWEEN "'
.$dsql->escape($this['date_started']).
'" AND "'
.$dsql->escape($this['date_ended']).
'"')
->where('date_ended BETWEEN "'
.$dsql->escape($this['date_started']).
'" AND "'
.$dsql->escape($this['date_ended']).
'"')
->where($tmp->_dsql()->andExpr()
->where('date_started < "'.$dsql->escape($this['date_ended']).'"')
->where('date_ended IS null')
)
)
->where('machine_id = '.$dsql->escape($this['machine_id']))
->where('id != '.$dsql->escape($this['id']))
)
->getOne();
许多问题首先是由括号引起的,这就是orExpr
和andExpr
这么多的原因。然后因为BETWEEN
阻止使用转义值的地方($ field,$ cond,$ value)。
如果我没有逃避价值观,它会起作用,但像往常一样,我不应该信任数据。我知道我可以用$ dsql-&gt; expr()然后setCustom写下完整的查询,但这不是使用这么棒的框架的重点。
编辑:
Additional information:
pdo_error: SQLSTATE[HY093]: Invalid parameter number: no parameters were bound
mode: select
params:
query: select (select concat(`site`.`emplacement`, " (", (select `nom` from `region` where `site`.`region_id` = `region`.`id` ), ")") `designation` from `site` where `site_machine`.`site_id` = `site`.`id` ) `site`,`id`,`machine_id`,`site_id` from `site_machine` where ((date_started BETWEEN ":a" AND ":a_2" or date_ended BETWEEN ":a_3" AND ":a_4" or (date_started < ":a_5" and date_ended IS null)) and machine_id = :a_6 and id != :a_7)
答案 0 :(得分:0)
您可以略微简化条件。 这应该与您在问题中写的相同:
date_started < period_end
AND (date_ended is null OR date_ended >= period_start)
是的,也没有更多的BETWEEN问题:)
如果您没有大量数据,那么您甚至可以这样做并完全摆脱OR
。但请记住,ifnull(date_ended)不会使用索引,可能会更慢(检查SELECT的执行计划):
date_started < period_end
AND IFNULL(date_ended, period_start) >= period_start