odbc_foreignkeys ( resource $connection_id , string $pk_catalog , string $pk_schema , string $pk_table , string $fk_catalog , string $fk_schema , string $fk_table ) : resource|false

Return Values

Returns an ODBC result identifier or false on failure.

The result set has the following columns:

• PKTABLE_CAT
• PKTABLE_SCHEM
• PKTABLE_NAME
• PKCOLUMN_NAME
• FKTABLE_CAT
• FKTABLE_SCHEM
• FKTABLE_NAME
• FKCOLUMN_NAME
• KEY_SEQ
• UPDATE_RULE
• DELETE_RULE
• FK_NAME
• PK_NAME
• DEFERRABILITY

Drivers can report additional columns.

If the foreign keys associated with a primary key are requested, the result set is ordered by FKTABLE_CAT, FKTABLE_SCHEM, FKTABLE_NAME and KEY_SEQ. If the primary keys associated with a foreign key are requested, the result set is ordered by PKTABLE_CAT, PKTABLE_SCHEM, PKTABLE_NAME and KEY_SEQ.

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.