title: System table to extract foreign keys in sap hana
body: <p>I would like to query a system-table in sap-hana db to extract information regarding foreign-keys. There are the 'Indexes' and 'Index_columns' system tables, but I only see the 'Constraint' column to contain 'Primary key' and '?' values, but not a foreign-key value. Any help regarding this highly appreciated.</p>