Schema

db_add_field db_create_index db_create_table db_describe_index db_describe_table db_drop_field db_drop_index db_drop_table db_fielddef_destroy db_fielddef_init db_indexdef_destroy db_indexdef_init db_indexdef_set_field db_indexdef_set_field_count db_indexdef_set_indextype db_indexfield_destroy db_indexfield_init db_tabledef_destroy db_tabledef_init db_tabledef_set_field db_tabledef_set_field_count db_tabledef_set_fields db_tabledef_set_index db_tabledef_set_index_count db_tabledef_set_indexes db_tabledef_set_tabletype

db_result_t db_drop_field ( db_t  hdb, const db_objname_t *  table, const db_objname_t *  field   ) Drop a field from a table. DBDLL_API db_result_t db_update_field(db_t, const db_objname_t * table, const db_objname_t * field, const db_fielddef_t*); Parameters: hdb  Database handle. table  Table name. field  Field name. A name must start with a letter and can be followed by one or more letters, numbers, or underscores. Returns: DB_OK when successful. DB_FAIL on failure. On failure, one of the following error codes is set: DB_EINVAL Caused by: invalid database handle, unable to open database file. DB_ENAME Invalid field name. DB_EFIELD General field error. DB_ENOTFOUND Field not found. DB_EINDEX Field is used by an index. Remove field from index first. DB_ELOCKED Table is locked by cursor or concurrent transaction. DB_ETXSTATE A transaction is active. A table can only be altered or dropped when there is no active transaction. If a transaction has been started, db_commit_tx or db_abort_tx must be used before db_drop_table can be called. See also: db_add_field, db_rename_field, db_update_field, get_db_error, clear_db_error, Error Handling