For update of

CLOSE cur;. After a TCL operation is performed, the cursor pointer gets reset and the cursor will be no longer accessible, thus results in an error when fetched further as shown below. Thus, any TCL operation on the cursor record set has to be done only after fetching all the rows from the cursor context area using a loop process similar to the above listing example. Error report —. ORA fetch out of sequence. ORA at line The row limiting clause introduced in the Oracle version 12c, Fetch First..

In this scenario, the cursor result set can be limited using the traditional rownum pseudo column. This scenario is portrayed in the below listing.

ORA at line 4. AND d. Oracle Training from Don Burleson The best on site " Oracle training classes " are just a phone call away! You can get personalized Oracle training by Donald Burleson, right at your shop!

The other transactions that want to update the same row are effectively put into a queue based on when they first try to read the value of the row. This example assumes you are running a local unsecured cluster. Next, we'll start a transaction and lock the row we want to operate on:. Hit enter twice in the SQL client to send the input so far to be evaluated.

This will result in the following output:. Now let's open another terminal and connect to the database from a second client we'll call this Terminal 2 :. From Terminal 2, start a transaction and try to lock the same row for updates that is already being accessed by the transaction we opened in Terminal Hit enter twice to send the input so far to be evaluated. Now that the transaction in Terminal 1 has committed, the transaction in Terminal 2 will be "unblocked", generating the following output, which shows the value left by the transaction in Terminal The transaction in Terminal 2 can now receive input, so let's update the row in question again:.

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