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我试图找出我试图合并到的表是否有一个identity列（来自一个 php 应用程序）。正在构建的查询是：

USE dhs;

select COLUMN_NAME as name 
from INFORMATION_SCHEMA.COLUMNS 
where TABLE_SCHEMA = 'dbo' 
and COLUMNPROPERTY(object_id(TABLE_NAME), COLUMN_NAME, 'IsIdentity') = 1 
AND TABLE_NAME = 'orders'

如果我在 Management Studio 中运行它，我会得到id（这是我所期望的）的返回值。但是，当我从我的应用程序运行相同的查询时，没有返回任何内容。我已经给了我的数据库用户完全权限，所以这不是权限问题。下面是我正在运行的 php（即使它应该返回 'id'，它当前也返回 false）：

$array = empty($array) ? $_POST : $array; //if no array is passed, use post
        $info = self::information_schema($db, $schema, $table);
        $clean = array(); //the hex-exscaped key values pairs that are matched against the database column names (so only items whose key matches a column name are used)
        $primary = array();// ON section array
        $update = array(); //the array for elements to update, each position is set to target.$k = source.$k
        $insert = array(); //The insert string, which is essentially array_keys($clean) minus any identity field with source. prepended
        $fields = array(); //fields to insert to with no source. prepended and no identity fields included
        $query= "USE $db 
                                select COLUMN_NAME as name
                                from INFORMATION_SCHEMA.COLUMNS
                                where TABLE_SCHEMA = '$schema'
                                and COLUMNPROPERTY(object_id(TABLE_NAME), COLUMN_NAME, 'IsIdentity') = 1
                                AND TABLE_NAME = '$table'"; //this gets the identity column of table it has one (to prevent trying to insert into an IDENTITY field)
                    $handle = sqlsrv_query(self::$conn, $query);
        $value = sqlsrv_fetch_array($handle, SQLSRV_FETCH_NUMBERIC);
        var_dump($value);

SQL Server 是否不允许您INFORMATION_SCHEMA从 SSMS 外部进行选择？

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