db2_foreign_keys
(PECL ibm_db2:1.0-1.6.2)
db2_foreign_keys — Returns a result set listing the foreign keys for a table
Описание
Returns a result set listing the foreign keys for a table.
Список параметров
- connection
-
A valid connection to an IBM DB2, Cloudscape, or Apache Derby database.
- qualifier
-
A qualifier for DB2 databases running on OS/390 or z/OS servers. For other databases, pass NULL or an empty string.
- schema
-
The schema which contains the tables. If schema is NULL, db2_foreign_keys() matches the schema for the current connection.
- table-name
-
The name of the table.
Возвращаемые значения
Returns a statement resource with a result set containing rows describing the foreign keys for the specified table. The result set is composed of the following columns:
| Column name | Description | |
|---|---|---|
| PKTABLE_CAT | Name of the catalog for the table containing the primary key. The value is NULL if this table does not have catalogs. | |
| PKTABLE_SCHEM | Name of the schema for the table containing the primary key. | |
| PKTABLE_NAME | Name of the table containing the primary key. | |
| PKCOLUMN_NAME | Name of the column containing the primary key. | |
| FKTABLE_CAT | Name of the catalog for the table containing the foreign key. The value is NULL if this table does not have catalogs. | |
| FKTABLE_SCHEM | Name of the schema for the table containing the foreign key. | |
| FKTABLE_NAME | Name of the table containing the foreign key. | |
| FKCOLUMN_NAME | Name of the column containing the foreign key. | |
| KEY_SEQ | 1-indexed position of the column in the key. | |
| UPDATE_RULE | Integer value representing the action applied to the foreign key when the SQL operation is UPDATE. | |
| DELETE_RULE | Integer value representing the action applied to the foreign key when the SQL operation is DELETE. | |
| FK_NAME | The name of the foreign key. | |
| PK_NAME | The name of the foreign key. | |
| PK_NAME | The name of the primary key. | |
| DEFERRABILITY | An integer value representing whether the foreign key deferrability is SQL_INITIALLY_DEFERRED, SQL_INITIALLY_IMMEDIATE, or SQL_NOT_DEFERRABLE. |