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What steps server process has to take to execute an update statement.

Total Answers and Comments: 2

Last Update: February 02, 2008 Asked by: Rohit Mathur

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Submitted by: ajaymore

During the execution of an update statement, the server process looks into library cache whether same kind of query is recently executed or not i.e. explain plan is ready for execution or not in shared pool and then search for that record block in the database buffer cache if it finds the block in the buffer then it modifies the block else it fetches the same from datafile to database buffer and then modifies it.

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razahaq

December 09, 2007 23:23:47

kishore.giri

Member Since: December 2007 Contribution: 15

RE: What steps server process has to take to execute an update statement.

During the execution of an update statement, the server process prepares its parsing,execution plan in shared pool and then search for that record in the database buffer cache if it finds the record in the buffer then it updates the record else it goes to the datafile to read the record to the database buffer cache and then updates it.

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February 02, 2008 06:38:28

ajaymore

Member Since: January 2008 Contribution: 2

RE: What steps server process has to take to execute an update statement.

During the execution of an update statement, the server process looks into library cache whether same kind of query is recently executed or not i.e. explain plan is ready for execution or not in shared pool and then search for that record block in the database buffer cache if it finds the block in the buffer then it modifies the block else it fetches the same from datafile to database buffer and then modifies it.

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