Operation | Code | Constant | Description |
|---|---|---|---|
Open | 0 | B_OPEN | Makes a file available for access. |
Close | 1 | B_CLOSE | Releases a file from availability. |
Insert | 2 | B_INSERT | Inserts a new record into a file. |
Update | 3 | B_UPDATE | Updates the current record. |
Delete | 4 | B_DELETE | Removes the current record from the file. |
Get Equal | 5 | B_GET_EQUAL | Returns the record whose key value matches the specified key value. |
Get Next | 6 | B_GET_NEXT | Returns the record following the current record in the index path. |
Get Previous | 7 | B_GET_PREVIOUS | Returns the record preceding the current record in the index path. |
Get Greater Than | 8 | B_GET_GT | Returns the record whose key value is greater than the specified key value. |
Get Greater Than or Equal | 9 | B_GET_GE | Returns the record whose key value is equal to or greater than the specified key value. |
Get Less Than | 10 | B_GET_LT | Returns the record whose key value is less than the specified key value. |
Get Less Than or Equal | 11 | B_GET_LE | Returns the record whose key value is equal to or less than the specified key value. |
Get First | 12 | B_GET_FIRST | Returns the first record in the specified index path. |
Get Last | 13 | B_GET_LAST | Returns the last record in the specified index path. |
Create | 14 | B_CREATE | Creates a file with the specified characteristics. |
Stat | 15 | B_STAT | Returns file and index characteristics, and number of records. |
Extend | 16 | B_EXTEND | Divides a data file over two logical disk drives. This operation is not supported in Btrieve 6.0 and later. |
Set Directory | 17 | B_SET_DIR | Sets the current directory to a specified path name. |
Get Directory | 18 | B_GET_DIR | Returns the current directory for a specified logical disk drive. |
Begin Transaction | 19 1019 | B_BEGIN_TRAN | Marks the beginning of a set of logically related operations. Operation 19 begins an exclusive transaction. Operation 1019 begins a concurrent transaction. |
End Transaction | 20 | B_END_TRAN | Marks the end of a set of logically related operations. |
Abort Transaction | 21 | B_ABORT_TRAN | Removes operations performed during an incomplete transaction. |
Get Position | 22 | B_GET_POSITION | Returns the position of the current record. |
Get Direct/Chunk | 23 | B_GET_DIRECT | Returns data from the specified chunks of a record at a specified position. |
Get Direct/Record | 23 | B_GET_DIRECT | Returns the record at a specified position. |
Step Next | 24 | B_STEP_NEXT | Returns the record from the physical location following the current record. |
Stop | 25 | B_STOP | Terminates the Workgroup MicroKernel Engine. Not available for other instances of MicroKernel Engine. |
Version | 26 | B_VERSION | Returns the version number of the MicroKernel Engine. |
Unlock | 27 | B_UNLOCK | Unlocks a record or records. |
Reset | 28 | B_RESET | Releases all resources held by a client. |
Set Owner | 29 | B_SET_OWNER | Assigns an owner name to a file. |
Clear Owner | 30 | B_CLEAR_OWNER | Removes an owner name from a file. |
Create Index | 31 | B_BUILD_INDEX | Creates an index. |
Drop Index | 32 | B_DROP_INDEX | Removes an index. |
Step First | 33 | B_STEP_FIRST | Returns the record in the first physical location in the file. |
Step Last | 34 | B_STEP_LAST | Returns the record in the last physical location in the file. |
Step Previous | 35 | B_STEP_PREVIOUS | Returns the record in the physical location preceding the current record. |
Get Next Extended | 36 | B_GET_NEXT_EXTENDED | Returns one or more records that follow the current record in the index path. Filtering conditions can be applied. |
Get Previous Extended | 37 | B_GET_PREV_EXTENDED | Returns one or more records that precede the current record in the index path. Filtering conditions can be applied. |
Step Next Extended | 38 | B_STEP_NEXT_EXT | Returns one or more successive records from the location physically following the current record. Filtering conditions can be applied. |
Step Previous Extended | 39 | B_STEP_PREVIOUS_EXT | Returns one or more preceding records from the location physically preceding the current record. Filtering conditions can be applied. |
Insert Extended | 40 | B_EXT_INSERT | Inserts one or more records into a file. |
Continuous Operation | 42 | B_CONTINUOUS | Allows system backups without closing active MicroKernel Engine files. |
Get By Percentage | 44 | B_SEEK_PERCENT | Returns the record located approximately at a position derived from the specified percentage value. |
Find Percentage | 45 | B_GET_PERCENT | Returns a percentage figure based on the current record's position in the file. |
Get Key | +50 | KEY_BIAS | Detects the presence of a key value in a file, without returning an actual record. |
Update Chunk | 53 | B_CHUNK_UPDATE | Updates specified portions (chunks) of the current record. This operation can also append data to a record or truncate a record. |
Stat Extended | 65 | B_EXTENDED_STAT | Returns file names and paths of an extended file's components and reports whether a file is using a system-defined log key. |
Login/Logout | 78 | B_LOGIN/B_LOGOUT | Enters user credentials to obtain authentication and authorization tokens from the database engine, or resets the credentials so that they must be entered again. |
Get Next Delete Extended | 85 | B_GET_NEXT_EXT_DELETE | Removes records matching a filter condition, from the logical next position to the end of the file. |
Get Previous Delete Extended | 86 | B_GET_PREV_EXT_DELETE | Removes records matching a filter condition, from the logical previous position to the beginning of the file. |
Step Next Delete Extended | 87 | B_STEP_NEXT_EXT_DELETE | Removes records matching a filter condition, from the physical next position to the end of the file. |
Step Previous Delete Extended | 88 | B_STEP_PREV_EXT_DELETE | Removes records matching a filter condition, Removes records matching a filter condition, from the physical previous position to the beginning of the file. |
Single-record wait lock | +100 | S_WAIT_LOCK | Locks only one record at a time. If the record is already locked, the MicroKernel Engine retries the operation. |
Single-record no-wait lock | +200 | S_NOWAIT_LOCK | Locks only one record at a time. If the record is already locked, the MicroKernel Engine returns an error status code. |
Multiple-record wait lock | +300 | M_WAIT_LOCK | Locks several records concurrently in the same file. If the record is already locked, the MicroKernel Engine retries the operation. |
Multiple-record no-wait lock | +400 | M_NOWAIT_LOCK | Locks several records concurrently in the same file. If the record is already locked, the MicroKernel Engine returns an error status code. |
No-wait page lock | +500 | NOWRITE_WAIT | In a concurrent transaction, tells the MicroKernel Engine not to wait if the page to be changed has already been changed by another active concurrent transaction. This bias can be combined with any of the record locking biases (+100, +200, +300, or +400). |