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PHP odbc 组件

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 $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

odbc_tables() - Get the list of table names stored in a specific data source
odbc_foreignkeys() - Retrieves a list of foreign keys

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