Description A GRelation is a table of data which can be indexed on any number of fields, rather like simple database tables. A GRelation contains a number of records, called tuples. Each record contains a number of fields. Records are not ordered, so it is not possible to find the record at a particular index. Note that GRelation tables are currently limited to 2 fields. To create a GRelation, use g_relation_new(). To specify which fields should be indexed, use g_relation_index(). Note that this must be called before any tuples are added to the GRelation. To add records to a GRelation use g_relation_insert(). To determine if a given record appears in a GRelation, use g_relation_exists(). Note that fields are compared directly, so pointers must point to the exact same position (i.e. different copies of the same string will not match.) To count the number of records which have a particular value in a given field, use g_relation_count(). To get all the records which have a particular value in a given field, use g_relation_select(). To access fields of the resulting records, use g_tuples_index(). To free the resulting records use g_tuples_destroy(). To delete all records which have a particular value in a given field, use g_relation_delete(). To destroy the GRelation, use g_relation_destroy(). To help debug GRelation objects, use g_relation_print(). GRelation has been marked as deprecated, since this API has never been fully implemented, is not very actively maintained and rarely used.