我正在尝试使用mysqli执行预准备语句,但该语句从不执行结果,也不会引发错误。但执行查询通常可以正常工作。
准备好的查询如下所示:
SELECT * FROM games WHERE YEARweek(game_date)=?
常规的非准备查询是
SELECT * FROM games WHERE YEARweek(game_date)= YEARweek(current_DATE) +1
任何想法为什么?
执行查询的代码位于不同的地方,但在短版本中看起来像这样:
$WHERE_CLAUSE='';
$first=true;
if(isset($conditions['conditions'])) {
foreach($conditions['conditions'] as $key=>$condition){
if(is_array($condition)){
} else {
if($first)
$WHERE_CLAUSE.=$key.'=?';
else
$WHERE_CLAUSE.=' AND '.$key.'=?';
$input_data[$key]=$condition;
$first=false;
}
}//end foreach
if(!empty($WHERE_CLAUSE)){
$query.='WHERE '.$WHERE_CLAUSE.' ';
}
}
$result=PVDatabase::preparedSelect($query, $input_data);
public static function preparedQuery($query, $data, $formats = '') {
if (self::_hasAdapter(get_class(), __FUNCTION__))
return self::_callAdapter(get_class(), __FUNCTION__, $query, $data, $formats);
if (self::$dbtype == self::$mySQLConnection) {
self::$link -> prepare($query);
$count = 1;
foreach ($data as $key => $value) {
self::$link -> bindParam($count, $value);
$count++;
}//end foreach
return self::$link -> execute();
} else if (self::$dbtype == self::$postgreSQLConnection) {
$result = pg_prepare(self::$link, '', $query);
$result = pg_execute(self::$link, '', $data);
return $result;
} else if (self::$dbtype == self::$oracleConnection) {
} else if (self::$dbtype == self::$msSQLConnection) {
$stmt = sqlsrv_prepare(self::$link, $query, $data);
return sqlsrv_execute($stmt);
}
}//end preparedQuery
答案 0 :(得分:4)
由于您没有提供用于调用查询的代码,我猜测您可能绑定了包含表达式的值。它不是被评估,而是按字面解释。
答案 1 :(得分:0)
PDO必须逃避第二个查询的YEARweek(current_DATE)+1部分。
请改为:
$next_year = date('Y) + 1;
SELECT * FROM games WHERE YEARweek(game_date) = $next_year