Question

我正在尝试使用两个表完成内部联接（Oracle称之为equijoins）并且我只是遗漏了一些东西，因为它与MySQL内部联接不同。我也是PHP的新手（来自Lasso）所以我正在努力严格要求我的语法以保证自己的理智。我查看了有关此错误的所有其他帖子，但他们没有帮助。

使用PHP 5.5.29连接到Oracle 12c数据库，在php信息页面安装并验证了OCI8。

Oracle's explanation of inner joins

$ login是纯文本，$ pw在此代码段之前进行哈希处理：

// separate the login types by the "_" character
if (strpos($login, "_") == true) {
    $fieldname = 'web_password_hash';
    $dynfield = 'web_id';
    $dynfield1 = 's.web_id';
} else {
    $fieldname = 'student_web_password_hash';
    $dynfield = 'student_web_id';
    $dynfield1 = 's.student_web_id';
}

$schoolid = '(pcs.schoolid=4 OR pcs.schoolid=5)';

// search custom table for a field with the correct password (parent/student)
$dbc = oci_connect($psusername, $pspassword, $psconnection);

if(!$dbc) {
    echo "Oracle Not connected";
} else {

$stmt = oci_parse($dbc, 'SELECT pcs.student_number AS snumber, :dynfield1 AS loginid, s.ID AS sid, s.family_ident AS famid, s.firstname AS fname, s.last_name AS lname, s.grade_level AS gradelevel 
    FROM pvsis_custom_students pcs, students s 
        WHERE pcs.student_number=s.student_number 
            AND :schoolid 
            AND pcs.field_name=:fieldname 
            AND pcs.string_value=:pw 
            AND s.enroll_status=0;');

// bind parameters to prevent SQL injection         
oci_bind_by_name($stmt, ':dynfield1', $dynfield1);          
oci_bind_by_name($stmt, ':fieldname', $fieldname);
oci_bind_by_name($stmt, ':schoolid', $schoolid);
oci_bind_by_name($stmt, ':pw', $pw);

// execute statement
oci_execute($stmt);

我得到的错误是：警告： oci_execute（）：ORA-00920： / path / to / file line XXX

中的关系运算符无效

Answer 1

您无法按照您在此处的方式绑定字段名称。您需要动态构建查询：

$stmt = oci_parse($dbc, 'SELECT pcs.student_number AS snumber, ' . $dynfield1 . ' AS loginid, s.ID AS sid, s.family_ident AS famid, s.firstname AS fname, s.last_name AS lname, s.grade_level AS gradelevel 
    FROM pvsis_custom_students pcs, students s 
        WHERE pcs.student_number=s.student_number 
            AND ' . $schoolid . '
            AND pcs.field_name=' . $fieldname . '
            AND pcs.string_value=:pw 
            AND s.enroll_status=0;');

删除bind_by_name，:dynfield1和:fieldname的{{1}}来电。

祝你好运。

Oracle内连接头痛oci_execute（）：ORA-00920：无效的关系运算符

1 个答案: