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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     4 "Eclipse Public License v1.0" which accompanies this distribution, 

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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 id="GUID-580471E3-7DFD-5325-A8B9-B3E7FABF872D" xml:lang="en"><title>Using

    13 TDbColSetIter</title><shortdesc>Provides a code snippet to show you how to use the <codeph>TDbColSetIter</codeph> iterator.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

    14 <section id="GUID-3A50A4D7-B6BD-40AB-B413-167BE7DE6DE9"><title>Using the iterator</title> <p><codeph>TDbColSetIter</codeph> provides

    15 a useful way to iterate over the contents of a column set. Given a <codeph>CDbColSet*

    16 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;

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

    18     {

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

    20         ++nullable;

    21     }</codeblock> </section>

    22 </conbody></concept>