Database System Lock Operation Method and Device

A database system lock operation method, comprising:

• acquiring, by a first processing node, a lock operand of a target lock, wherein the lock operand is used to record a current state of the target lock on each processing node in the database system, and the current state of the target lock on each processing node in the database system is represented by one or more data bits in the lock operand;
• using, by the first processing node, the target lock to perform a lock releasing operation on a target data object;
• and
• updating, by the first processing node, a value of a data bit that is in the lock operand and used to indicate a state of the target lock on the first processing node to a value that is used to indicate that the state of the target lock on the first processing node is No lock held such that a processing node in the database system knows, according to the lock operand, that the state of the target lock on the first processing node is No lock held.

A node device, comprising:

• an acquiring unit;
• an operation unit;
• and
• a determining unit,
• wherein the acquiring unit is configured to acquire a lock operand of a target lock, the lock operand is used to record a current state of the target lock on each processing node in a database system, the database system is a database system in which the node device locates, and the current state of the target lock on each processing node in the database system is represented by one or more data bits in the lock operand,
• wherein the operating unit is configured to use the target lock to perform a lock acquiring operation on a target data object on the node device, and update a value of a data bit that is in the lock operand and used to indicate a state of the target lock on a first processing node to a value that is used to indicate that the state of the target lock on the first processing node is lock held, and
• wherein the determining unit is configured to determine, according to the lock operand, whether the lock acquiring operation is successful.

A node device, comprising:

• an acquiring unit;
• an operation unit;
• and
• an updating unit,
• wherein the acquiring unit is configured to acquire a lock operand of a target lock, the lock operand is used to record a current state of the target lock on each processing node in a database system, the database system is a database system in which the node device locates, and the current state of the target lock on each processing node in the database system is represented by one or more data bits in the lock operand,
• wherein the operating unit is configured to use the target lock to perform a lock releasing operation on a target data object, and
• wherein the updating unit is configured to update a value of a data bit that is in the lock operand and used to indicate a state of the target lock on the node device to a value that is used to indicate that the state of the target lock on the node device is No lock held such that a processing node in the database system knows, according to the lock operand, that the state of the target lock on the node device is No lock held.