Question

I need to update an ORA table with two CLOB columns.

I have found many solutions for this (one with select x, y into x_loc, y_loc from table for update and then do a dbms_lob.write() + commit) but I realized that this one is as simple as it should be:

UPDATE table SET
    clob1 = TO_CLOB(VARCHAR2_VALUE),
    clob2 = TO_CLOB(VARCHAR2_VALUE)
WHERE condition

After executing this query from PHP application I encounter strange behavior when I cannot execute any other update on that table (and/or concrete row) – the application just hangs on right on another update (confirmed by debugging). When trying to do update query using sqldeveloper it seems there is no lock issue.

Is there any possibility that the table/row remained locked after the CLOB update?
Should I did/do a commit after the CLOB update using the given update query?
How can I release this lock if it is there?

Many thanks for Your answers!

Answer 1

You must commit every DML query (INSERT,UPDATE,DELETE) .

It does not matter whether you use CLOB or no.