我写了一个自定义DQL函数。在这个函数中,我使用相同的参数两次:
public function getSql(SqlWalker $sqlWalker)
{
$point1_lat = $this->point1_lat->dispatch($sqlWalker);
$point1_lon = $this->point1_lon->dispatch($sqlWalker);
$point2_lat = $this->point2_lat->dispatch($sqlWalker);
$point2_lon = $this->point2_lon->dispatch($sqlWalker);
$unitFactor = 6366.56486; // earth radius in km
return "
$unitFactor *
2 *
ASIN(
SQRT(
POWER(
SIN(($point1_lat - $point2_lat) * pi()/180/2),
2
) +
COS($point1_lat * pi()/180) *
COS($point2_lat * pi()/180) *
POWER(
SIN(($point1_lon - $point2_lon) * pi()/180/2),
2
)
)
)
";
}
这是查询的执行方式:
$q = \App::get()->getEntityManager()->createQuery('
SELECT
s,
GEO_DISTANCE(
:lat,
:lng,
s.glat,
s.glng
) AS distance
FROM
\Application\Geo\Entity\Street s
');
$q->setMaxResults(10);
$q->setParameters(array(
'lat' => 52.25948,
'lng' => 6.76403,
));
$result = $q->getResult();
然而,这给了我以下例外:
消息:SQLSTATE [HY093]:参数号无效:绑定数 变量与令牌数量不匹配
getSql()返回以下SQL:
6366.56486 *
2 *
ASIN(
SQRT(
POWER(
SIN((? - g0_.glat) * pi()/180/2),
2
) +
COS(? * pi()/180) *
COS(g0_.glat * pi()/180) *
POWER(
SIN((? - g0_.glng) * pi()/180/2),
2
)
)
)
所以我想抛出异常是因为命名参数作为索引参数返回。这是教条中的错误还是我做错了什么?
答案 0 :(得分:0)
这不是一个错误,你只能使用每个参数一次,因为dispatch()
函数将值放在堆栈一次,以匹配一个查询中?
占位符。
作为解决方法,您可以多次调用dispatch():
public function getSql(SqlWalker $sqlWalker)
{
$point1_lat_a = $this->point1_lat->dispatch($sqlWalker);
$point1_lat_b = $this->point1_lat->dispatch($sqlWalker);
$point1_lon = $this->point1_lon->dispatch($sqlWalker);
$point2_lat_a = $this->point2_lat->dispatch($sqlWalker);
$point2_lat_b = $this->point2_lat->dispatch($sqlWalker);
$point2_lon = $this->point2_lon->dispatch($sqlWalker);
$unitFactor = 6366.56486; // earth radius in km
return "
$unitFactor *
2 *
ASIN(
SQRT(
POWER(
SIN(($point1_lat_a - $point2_lat_a) * pi()/180/2),
2
) +
COS($point1_lat_b * pi()/180) *
COS($point2_lat_b * pi()/180) *
POWER(
SIN(($point1_lon - $point2_lon) * pi()/180/2),
2
)
)
)
";
}