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Identifying a missing primary key
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DB2_FOREIGN_KEYS(3) 1 DB2_FOREIGN_KEYS(3) db2_foreign_keys - Returns a result set listing the foreign keys for a table SYNOPSIS
resource db2_foreign_keys (resource $connection, string $qualifier, string $schema, string $table-name) DESCRIPTION
Returns a result set listing the foreign keys for a table. PARAMETERS
o $connection - A valid connection to an IBM DB2, Cloudscape, or Apache Derby database. o $qualifier - A qualifier for DB2 databases running on OS/390 or z/OS servers. For other databases, pass NULL or an empty string. o $schema - The schema which contains the tables. If $schema is NULL, db2_foreign_keys(3) matches the schema for the current connection. o $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 com- posed 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 for- | | | eign key deferrability is SQL_INITIALLY_DEFERRED, | | | SQL_INITIALLY_IMMEDIATE, or SQL_NOT_DEFERRABLE. | | | | +--------------+---------------------------------------------------+ SEE ALSO
db2_column_privileges(3), db2_columns(3), db2_primary_keys(3), db2_procedure_columns(3), db2_procedures(3), db2_special_columns(3), db2_statistics(3), db2_table_privileges(3), db2_tables(3). PHP Documentation Group DB2_FOREIGN_KEYS(3)
