odbc_primarykeys

(PHP 4, PHP 5, PHP 7, PHP 8)

odbc_primarykeys — Gets the primary keys for a table

说明

odbc_primarykeys ( resource $odbc , string|null $catalog , string $schema , string $table ) : resource|false

Returns a result identifier that can be used to fetch the column names that comprise the primary key for a table.

参数

odbc

ODBC 连接标识符，详见 odbc_connect()。

catalog

The catalog ('qualifier' in ODBC 2 parlance).

schema

The schema ('owner' in ODBC 2 parlance).

table

返回值

Returns an ODBC result identifier 或者在失败时返回 false.

The result set has the following columns:

  • TABLE_CAT
  • TABLE_SCHEM
  • TABLE_NAME
  • COLUMN_NAME
  • KEY_SEQ
  • PK_NAME
Drivers can report additional columns.

The result set is ordered by TABLE_CAT, TABLE_SCHEM, TABLE_NAME and KEY_SEQ.

范例

示例 #1 List primary Keys of a Column

<?php
$conn = odbc_connect($dsn, $user, $pass);
$primarykeys = odbc_primarykeys($conn, 'TutorialDB', 'dbo', 'TEST');
while (($row = odbc_fetch_array($primarykeys))) {
    print_r($row);
    break; // further rows omitted for brevity
}
?>

以上例程的输出类似于：

Array
(
    [TABLE_CAT] => TutorialDB
    [TABLE_SCHEM] => dbo
    [TABLE_NAME] => TEST
    [COLUMN_NAME] => id
    [KEY_SEQ] => 1
    [PK_NAME] => PK__TEST__3213E83FE141F843
)

参见