1 <?xml version="1.0" encoding="utf-8"?>

     2 <!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->

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     7     Nokia Corporation - initial contribution.

     8 Contributors: 

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    10 <!DOCTYPE concept

    11   PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

    12 <concept xml:lang="en" id="GUID-580471E3-7DFD-5325-A8B9-B3E7FABF872D"><title>Using TDbColSetIter</title><prolog><metadata><keywords/></metadata></prolog><conbody><section><title>Using the iterator</title> <p><codeph>TDbColSetIter</codeph> provides a useful way to iterate over the contents of a column set. Given a <codeph>CDbColSet* set</codeph>, we can count the number of nullable columns like this:</p> <codeblock id="GUID-14CED4FF-C2A4-54E4-B089-A97EA9503AE6" xml:space="preserve">TInt nullable=0;

    13 for (TDbColSetIter iter(*set);iter;++iter)

    14     {

    15     if ((iter->iAttributes&TDbCol::ENotNull)==0)

    16         ++nullable;

    17     }</codeblock> </section> </conbody></concept>