db2_foreign_keys
(no version information, might be only in CVS)db2_foreign_keys -- Returns a result set listing the foreign keys for a table
Описание
resource db2_foreign_keys ( resource connection, string qualifier, string schema, string table-name )
- 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 primary key. |
| DEFERRABILITY | - An integer value representing whether the foreign key deferrability is SQL_INITIALLY_DEFERRED, SQL_INITIALLY_IMMEDIATE, or SQL_NOT_DEFERRABLE. |
Смотрите также
-
| db2_column_privileges() |
| db2_columns() |
| db2_primary_keys() |
| db2_procedure_columns() |
| db2_procedures() |
| db2_special_columns() |
| db2_statistics() |
| db2_table_privileges() |
| db2_tables() |
db2_field_width
db2_free_result 22222
