OCI fetch problem:

Question

I had a problem in using OCIStmtFetch
I wrote a class to realize the "select", but facing a problem, that is
A table have many fiels, an attribute of one of the fields was null,
I did the OCIStmtFetch (trying to select the field), I want to get the record whose field was null,but the record of that field (is null) and all the following records cannot to be got(read out).
connectiong and all the enviorment are ok, and no eroor was reported during the compiling and executing.
Thanks

Answer 1

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I have one query with results that needs to be reused in several parts of my website. I can't seem to find the equivalent of the mysql_data_seek in Oracle. I wanted to reset the cursor/pointer of oci_fetch($result) so that I can scroll the result again.
So far this are what I have come up:
A. On first fetch put the the results in a php array and call the array later on.
B. Do the query again.
C. Keep on looking for a mysql_data_seek equivalent and fail.
I'm leaning towards option 'A' but I just wanted to consult the experts.
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If option A works for you then use it. Oracle has no equivalent to mysql_data_seek.
The option to use depends on your business requirements. If you know you want exactly the same results you will have to cache the original results. If you redo the query you are NOT guaranteed to get the same results or even the same number of rows.
Someone could have inserted/deleted/updated rows after you began your first query. Then when you do your second query you would get different results. This means that if you query for the first 100 records a second query to get the next 100 may return some of the same records your first query retrieved and even those 'same' records (based on primary key) may be different if they have been updated.