write lock is compatiable with which type of lock?
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Answer / yuvaevergreen
EXCLUSIVE LOCK - NONE
WRITE LOCK - ACCESS
READ - READ, ACCESS
ACCESS - READ,WRITE,ACCESS
| Is This Answer Correct ? | 8 Yes | 0 No |
Answer / yuvaevergreen
Adding to above, teradata locks objects on first come first
serve basis. write locks are generally used for dmls like
insert,update,delete. select statement uses access lock.
exclusive locks are used for ddls like create,alter. Pseudo
lock is a concept by which teradata assigns one amp to take
care of locking the rows of the table in other amps. This
amp makes sure that other amps lock the table.
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / tdguy
exclusive lock - not compatible with other locks.
write lock - compatible with access lock
read - compatible with read,access
access - compatible with write,read,access
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / etlguy
exclusive lock - none.
write lock - access lock
read - read,access
access - write,read,access
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / shaik mahamad rafi
write lock applying on table level ,we don't have read and exclusive .... both are in queue .
| Is This Answer Correct ? | 0 Yes | 0 No |
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