odbc_primarykeys

(PHP 4, PHP 5, PHP 7)

odbc_primarykeysGets the primary keys for a table

说明

odbc_primarykeys ( resource $connection_id , string $catalog , string $schema , string $table ) : resource

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

参数

connection_id

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

Example #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