SELECT COUNT上的PHP PDO HY093错误

一直在研究所有类似的问答环节，但是我现在无法找到解决方案，现在我已经在墙上敲了两天多了 .

我正在根据用户输入构建查询，所以我不会发布所有的mumbo jumbo .

在查询完成并准备好后，请考虑 $binds 此类型的关联数组 :key => val 用于绑定值 .

这是类函数的一部分（仅显示构建查询后的部分）：

$stmt = $this->pdo->prepare($stmt);
foreach($binds as $k => $v){
    $col = explode('.',substr($k,1));//because all keys start with ':' and some end with '.key'
    $col = $col[0];
    if($col == 'year'){
        $col = 'model_year';
    }
    $stmt->bindValue($k,$v,$this->tblInfo->pdo_param($col));//tblInfo is a class
    //holding an array with column names and types for the table i'm working with
    //and a function that returns PDO::PARAM_ type based on the column type
}
if($stmt->execute()){
    $res = $stmt->fetchAll(PDO::FETCH_ASSOC);
}
return array('binds' => $binds,$stmt,'err' => $stmt->errorInfo(),'result' => $res);

这是函数的 json_encoded 输出：

{
"binds": {
    ":make": "audi",
    ":model": "a4",
    ":year.1": "2013",
    ":price.1": "9990",
    ":gearbox.0": "auto",
    ":fuel.0": "diesel",
    ":mileage.0": "0",
    ":mileage.1": "350000"
},
"0": {
    "queryString": "SELECT COUNT(active) AS main FROM ads_auto WHERE active=true
 AND has_photo=true AND make=:make AND model=:model AND model_year <= :year.1 AND
price <= :price.1 AND gearbox=:gearbox.0 AND fuel=:fuel.0 AND mileage BETWEEN 
:mileage.0 AND :mileage.1"
},
"err": [
    "HY093",
    null,
    null
],
"result": null
}

AND debugDumpParams() ：

SQL: [245] SELECT COUNT(active) AS main FROM ads_auto WHERE active=true AND
has_photo=true AND make=:make AND model=:model AND model_year <= :year.1 AND 
price <= :price.1 AND gearbox=:gearbox.0 AND fuel=:fuel.0 AND mileage BETWEEN
:mileage.0 AND :mileage.1

Params:  8
Key: Name: [5]  :make      paramno=-1 name=[5]  ":make"      is_param=1 param_type=2
Key: Name: [6]  :model     paramno=-1 name=[6]  ":model"     is_param=1 param_type=2
Key: Name: [7]  :year.1    paramno=-1 name=[7]  ":year.1"    is_param=1 param_type=1
Key: Name: [8]  :price.1   paramno=-1 name=[8]  ":price.1"   is_param=1 param_type=1
Key: Name: [10] :gearbox.0 paramno=-1 name=[10] ":gearbox.0" is_param=1 param_type=2
Key: Name: [7]  :fuel.0    paramno=-1 name=[7]  ":fuel.0"    is_param=1 param_type=2
Key: Name: [10] :mileage.0 paramno=-1 name=[10] ":mileage.0" is_param=1 param_type=1
Key: Name: [10] :mileage.1 paramno=-1 name=[10] ":mileage.1" is_param=1 param_type=1

$stmt->execute() 显然是 FALSE ，所以它没有取得 .

$binds 数组包含 $stmt 需要绑定的内容 .

我没有使用任何报价 .

我阅读了COUNT（）和PDO的问题，所以我尝试了 SELECT id 而不是 SELECT COUNT ，但由于 $stmt->execute() 是 FALSE ，因此没有任何区别 .

WHY OH WHY 我有HY093吗？我错过了什么？

使用PHP 5.5和MySQL 5.5与InnoDB .