NODE_NAME

VARCHAR

Name of the node that is reporting the requested information on which lock interaction occurs.

SESSION_ID

VARCHAR

Identifier for this session. This identifier is unique within the cluster at any point in time but can be reused when the session closes.

OBJECT_NAME

VARCHAR

Name of object being locked; can be a table or an internal structure (projection, global catalog, or local catalog).

MODE

VARCHAR

Intended operations of the transaction:

• S — Share lock needed for select operations.
• I — Insert lock needed for insert operations.
• SI — Share+Insert lock needed for operations that read and query the table. Distinguished from X because SI mode disallows delete/update operations. SI is also the result of lock promotion (see Table 2).
• X — Exclusive lock is always needed for delete operations. X lock is also the result of lock promotion (see Table 2).
• T — Tuple Mover lock used by the Tuple Mover and also used for COPY into pre-join projections.
• U — Usage lock needed for moveout and mergeout operations in the first phase; they then upgrade their U lock to a T lock for the second phase. U locks conflicts with no other locks but O.
• O — Owner lock needed for DROP_PARTITION, TRUNCATE TABLE, and ADD COLUMN. O locks conflict with all locks. O locks never promote.
• NONE

S - 选择操作所需的共享锁。
I - 插入操作所需的插入锁定。
SI - 共享+读取和查询表的操作所需的插入锁。 区别于X，因为SI模式不允许删除/更新操作。 SI也是锁升级的结果（见表2）。
X - 独占锁定总是需要删除操作。 X锁也是锁升级的结果（见表2）。
Tuple Mover使用的T - Tuple Mover锁，也用于COPY预连接投影。
U - 第一阶段时差和合并操作所需的使用锁定; 然后他们将U锁升级为第二阶段的T锁。 U锁不和其他锁冲突，除了O.
O - DROP_PARTITION，TRUNCATE TABLE和ADD COLUMN所需的所有者锁定。 O锁与所有锁冲突。 O锁永远不会升级。
没有

共享（S)锁：多个事务可封锁一个共享页；任何事务都不能修改该页； 通常是该页被读取完毕，S锁立即被释放。 
排它（X)锁：仅允许一个事务封锁此页；其他任何事务必须等到X锁被释放才能对该页进行访问；X锁一直到事务结束才能被释放。 
更新（U)锁：用来预定要对此页施加X锁，它允许其他事务读，但不允许再施加U锁或X锁；当被读取的页将要被更新时，则升级为X锁；U锁一直到事务结束时才能被释放。

AVG_HOLD_TIME

INTERVAL

Average time (measured in intervals) that HP Vertica holds a lock.

MAX_HOLD_TIME

INTERVAL

Maximum time (measured in intervals) that HP Vertica holds a lock.

HOLD_COUNT

INTEGER

Total number of times lock was taken in the given mode.

AVG_WAIT_TIME

INTERVAL

Average time (measured in intervals) that HP Vertica waits on the lock

MAX_WAIT_TIME

INTERVAL

Maximum time (measured in intervals) that HP Vertica waits on a lock

WAIT_COUNT

INTEGER

Total number of times lock was unavailable at the time it was first requested.