Saturday 22 February 2014

"Pseudo Table" Locks Meaning in Teradata


 What does” Pseudo Table” Locks mean in EXPLAIN Plan in Teradata?

It is a false lock which is applied on the table to prevent  two users from getting conflicting locks with all-AMP requests.
PE will determine an particular AMP to manage all AMP LOCK requests for given table and Put Pseudo lock on the table.


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