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.