odbc_foreignkeys
(PHP 4, PHP 5, PHP 7)
odbc_foreignkeys — Retrieves a list of foreign keys
说明
$connection_id ,
string $pk_qualifier ,
string $pk_owner ,
string $pk_table ,
string $fk_qualifier ,
string $fk_owner ,
string $fk_table ) :
resource
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
-
connection_id -
ODBC 连接标识符，详见 odbc_connect()。
-
pk_qualifier -
The primary key qualifier.
-
pk_owner -
The primary key owner.
-
pk_table -
The primary key table.
-
fk_qualifier -
The foreign key qualifier.
-
fk_owner -
The foreign key owner.
-
fk_table -
The foreign key 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:
- PKTABLE_QUALIFIER
- PKTABLE_OWNER
- PKTABLE_NAME
- PKCOLUMN_NAME
- FKTABLE_QUALIFIER
- FKTABLE_OWNER
- FKTABLE_NAME
- FKCOLUMN_NAME
- KEY_SEQ
- UPDATE_RULE
- DELETE_RULE
- FK_NAME
- PK_NAME
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.
