Updating records using cursors latest online dating for filipina

Posted by / 03-Sep-2018 08:33

A sensitive cursor picks up data modifications affecting the result set of the cursor, and an insensitive cursor does not.

One has to pay attention when using holdable cursors, however. Thus, once a transaction has been ended and committed, a subsequent transaction (running in a different application) could inherit existing holdable cursors.Thus, data modifications (insert, update, delete operations) from other transactions could affect the result set.A cursor can be SENSITIVE or INSENSITIVE to such data modifications.(Some DBMS deviate from this standard behavior and also keep holdable cursors open over ROLLBACK.) When a COMMIT occurs, a holdable cursor is positioned before the next row.Thus, a positioned UPDATE or positioned DELETE statement will only succeed after a FETCH operation occurred first in the transaction.

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By using the same mechanics, a SQL procedure can also define a result set and return it directly to the caller of the SQL procedure or to a client application.