odbc_foreignkeys
(PHP 4, PHP 5, PHP 7, PHP 8)
odbc_foreignkeys — Retrieves a list of foreign keys
说明
Odbc\Connection
$odbc
,?string
$pk_catalog
,string
$pk_schema
,string
$pk_table
,string
$fk_catalog
,string
$fk_schema
,string
$fk_table
): Odbc\Result|false
Retrieves a list of foreign keys in the specified table or a list of foreign keys in other tables that refer to the primary key in the specified table
参数
odbc
-
ODBC 连接对象,详见 odbc_connect()。
pk_catalog
-
The catalog ('qualifier' in ODBC 2 parlance) of the primary key table.
pk_schema
-
The schema ('owner' in ODBC 2 parlance) of the primary key table.
pk_table
-
The primary key table.
fk_catalog
-
The catalog ('qualifier' in ODBC 2 parlance) of the foreign key table.
fk_schema
-
The schema ('owner' in ODBC 2 parlance) of the foreign key table.
fk_table
-
The foreign key table.
返回值
返回 ODBC 结果对象 或者在失败时返回 false
。
The result set has the following columns:
PKTABLE_CAT
PKTABLE_SCHEM
PKTABLE_NAME
PKCOLUMN_NAME
FKTABLE_CAT
FKTABLE_SCHEM
FKTABLE_NAME
FKCOLUMN_NAME
KEY_SEQ
UPDATE_RULE
DELETE_RULE
FK_NAME
PK_NAME
DEFERRABILITY
If the foreign keys associated with a primary key are requested, the result set
is ordered by FKTABLE_CAT
, FKTABLE_SCHEM
,
FKTABLE_NAME
and KEY_SEQ
.
If the primary keys associated with a foreign key are requested, the result set
is ordered by PKTABLE_CAT
, PKTABLE_SCHEM
,
PKTABLE_NAME
and KEY_SEQ
.
If pk_table
contains a table name,
odbc_foreignkeys() returns a result set
containing the primary key of the specified table and all of the
foreign keys that refer to it.
If fk_table
contains a table name,
odbc_foreignkeys() returns a result set
containing all of the foreign keys in the specified table and the
primary keys (in other tables) to which they refer.
If both pk_table
and
fk_table
contain table names,
odbc_foreignkeys() returns the foreign keys in
the table specified in fk_table
that refer
to the primary key of the table specified in
pk_table
. This should be one key at most.
更新日志
版本 | 说明 |
---|---|
8.4.0 |
odbc 现在需要 Odbc\Connection
实例;之前需要 resource。
|
8.4.0 | 此函数现在返回 Odbc\Result 实例;之前返回 resource。 |
参见
- odbc_tables() - Get the list of table names stored in a specific data source
- odbc_primarykeys() - Gets the primary keys for a table
用户贡献的备注
备份地址:http://www.lvesu.com/blog/php/function.odbc-foreignkeys.php