This is used when the caller knows that logical locks are already obtained so need not be requested again. For instance when inserting a row into an index, a X row lock has already been obtained when the row was inserted into the base table, so there is no need to get another lock in the secondary index.
This class overrides all interfaces of BTreeLockingPolicy making them no-ops.
| Access | Constructor and Description |
|---|---|
| public | B2INoLocking(Transaction rawtran, int lock_level, LockingPolicy locking_policy, ConglomerateController base_cc, OpenBTree open_btree)
Constructors for This class: |
| protected |
| Modifier and Type | Method and Description |
|---|---|
| public boolean | lockNonScanPreviousRow(LeafControlRow
Latched current leaf where "current" key is. current_leaf, int The slot of row on "current_leaf" current_slot, FetchDescriptor lock_fetch_desc, DataValueDescriptor[] Empty full template row, to read row into. lock_template, RowLocation lock_row_loc, OpenBTree The open_btree to associate latches with -
used if routine has to scan backward. open_btree, int For what operation are we requesting the lock,
this should be one of the following 4 options:
LOCK_READ [read lock],
(LOCK_INS | LOCK_UPD) [ lock for insert],
(LOCK_INSERT_PREVKEY | LOCK_UPD) [lock for
previous key to insert],
(LOCK_UPD) [lock for delete or replace] lock_operation, int For what duration should the lock be held,
if INSTANT_DURATION, then the routine will
guarantee that lock was acquired while holding
the latch, but then immediately release the
lock. If COMMIT_DURATION or MANUAL_DURATION
then the lock be held when routine returns
successfully. lock_duration)Implements org. Lock the row previous to the input row. |
| public boolean | lockNonScanRow(BTree
The conglomerate we are locking. btree, LeafControlRow If non-null, this leaf is unlatched if the
routine has to wait on the lock. current_leaf, LeafControlRow If non-null, this leaf is unlatched if the
routine has to wait on the lock. aux_leaf, DataValueDescriptor[] In memory, objectified "current" row. current_row, int For what operation are we requesting the lock,
this should be one of the following 4 options:
LOCK_READ [read lock],
(LOCK_INS | LOCK_UPD) [ lock for insert],
(LOCK_INSERT_PREVKEY | LOCK_UPD) [lock for
previous key to insert],
(LOCK_UPD) [lock for delete or replace] lock_operation)Implements org. Lock the in memory row. |
| public boolean | lockNonScanRowOnPage(LeafControlRow
The control row of the current leaf to lock. current_leaf, int The slot position of the row to lock. current_slot, FetchDescriptor lock_fetch_desc, DataValueDescriptor[] A scratch area to use to read in rows. lock_template, RowLocation lock_row_loc, int For what operation are we requesting the lock,
this should be one of the following 4 options:
LOCK_READ [read lock],
(LOCK_INS | LOCK_UPD) [ lock for insert],
(LOCK_INSERT_PREVKEY | LOCK_UPD) [lock for
previous key to insert],
(LOCK_UPD) [lock for delete or replace] lock_operation)Implements org. Lock the row at the given slot. |
| public boolean | lockScanCommittedDeletedRow(OpenBTree
The conglomerate we are locking. open_btree, LeafControlRow The leaf page with the row to lock. leaf, DataValueDescriptor[] A scratch area to use to read in RowLocation. template, FetchDescriptor lock_fetch_desc, int The slot of row on "current_leaf" slot_no)Implements org. Lock a btree row to determine if it is a committed deleted row. |
| public boolean | Returns: Whether locks were acquired without releasing latch on leaf.The open_btree to associate latches with -
used if routine has to scan backward. open_btree, BTreeRowPosition The position of the row to lock. pos, FetchDescriptor lock_fetch_desc, DataValueDescriptor[] A scratch area to use to read in rows. lock_template, RowLocation lock_row_loc, boolean Is this a previous key lock call? previous_key_lock, boolean Is the scan for update or for read only. forUpdate, int For what operation are we requesting the lock,
this should be one of the following 4 options:
LOCK_READ [read lock],
(LOCK_INS | LOCK_UPD) [ lock for insert],
(LOCK_INSERT_PREVKEY | LOCK_UPD) [lock for
previous key to insert],
(LOCK_UPD) [lock for delete or replace] lock_operation)Implements org. Lock a row as part of doing the scan. |
| public void | unlockScanRecordAfterRead(BTreeRowPosition
Data structure that defines the current position
in the scan to be unlocked. pos, boolean Is the scan for update or for read only. forUpdate)Implements org. Release read lock on a row. |
| B2INoLocking | back to summary |
|---|---|
| public B2INoLocking(Transaction rawtran, int lock_level, LockingPolicy locking_policy, ConglomerateController base_cc, OpenBTree open_btree) Constructors for This class: | |
| B2INoLocking | back to summary |
|---|---|
| protected B2INoLocking() | |
| lockNonScanPreviousRow | back to summary |
|---|---|
| public boolean lockNonScanPreviousRow(LeafControlRow current_leaf, int current_slot, FetchDescriptor lock_fetch_desc, DataValueDescriptor[] lock_template, RowLocation lock_row_loc, OpenBTree open_btree, int lock_operation, int lock_duration) throws StandardException Implements org. Lock the row previous to the input row. See BTree.lockPreviousRow() for more info.
| |
| lockNonScanRow | back to summary |
|---|---|
| public boolean lockNonScanRow(BTree btree, LeafControlRow current_leaf, LeafControlRow aux_leaf, DataValueDescriptor[] current_row, int lock_operation) throws StandardException Implements org. Lock the in memory row. See BTree.lockRow() for more info.
| |
| lockNonScanRowOnPage | back to summary |
|---|---|
| public boolean lockNonScanRowOnPage(LeafControlRow current_leaf, int current_slot, FetchDescriptor lock_fetch_desc, DataValueDescriptor[] lock_template, RowLocation lock_row_loc, int lock_operation) throws StandardException Implements org. Doc from org. Lock the row at the given slot. If this routine returns true all locks were acquired while maintaining the latch on leaf. If this routine returns false, locks may or may not have been acquired, and the routine should be called again after the client has researched the tree to reget the latch on the appropriate page.
| |
| lockScanCommittedDeletedRow | back to summary |
|---|---|
| public boolean lockScanCommittedDeletedRow(OpenBTree open_btree, LeafControlRow leaf, DataValueDescriptor[] template, FetchDescriptor lock_fetch_desc, int slot_no) throws StandardException Implements org. Lock a btree row to determine if it is a committed deleted row. Request an exclusive lock on the row located at the given slot, NOWAIT. Return true if the lock is granted, otherwise false.
| |
| lockScanRow | back to summary |
|---|---|
| public boolean lockScanRow(OpenBTree open_btree, BTreeRowPosition pos, FetchDescriptor lock_fetch_desc, DataValueDescriptor[] lock_template, RowLocation lock_row_loc, boolean previous_key_lock, boolean forUpdate, int lock_operation) throws StandardException Implements org. Lock a row as part of doing the scan. Lock the row at the given slot (or the previous row if slot is 0). If this routine returns true all locks were acquired while maintaining the latch on leaf. If this routine returns false, locks may or may not have been acquired, and the routine should be called again after the client has researched the tree to reget the latch on the appropriate page.
| |
| unlockScanRecordAfterRead | back to summary |
|---|---|
| public void unlockScanRecordAfterRead(BTreeRowPosition pos, boolean forUpdate) throws StandardException Implements org. Release read lock on a row.
| |