odbc_foreignkeys

Description

Odbc_foreignkeys() retrieves information about foreign keys. Returns an ODBC result identifier or false on failure.

The result set has the following columns:

• PKTABLE_QUALIFIER

• PKTABLE_OWNER

• PKTABLE_NAME

• PKCOLUMN_NAME

• FKTABLE_QUALIFIER

• FKTABLE_OWNER

• FKTABLE_NAME

• FKCOLUMN_NAME

• KEY_SEQ

• UPDATE_RULE

• DELETE_RULE

• FK_NAME

• PK_NAME

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.