db2_foreign_keys
PECL ibm_db2 >= 1.0.0
db2_foreign_keys - Returns a result set listing the foreign keys for a table
Manual
db2_foreign_keys(
resource$connection,
string$qualifier,
string$schema,
string$table-name
): resource
resource$connection,
string$qualifier,
string$schema,
string$table-name
): resource
Returns a result set listing the foreign keys for a table.
Parameters
- 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.
Return Values
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 primary key. |
| DEFERRABILITY | An integer value representing whether the foreign key deferrability is SQL_INITIALLY_DEFERRED, SQL_INITIALLY_IMMEDIATE, or SQL_NOT_DEFERRABLE. |