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7 Nokia Corporation - initial contribution. |
7 Nokia Corporation - initial contribution. |
8 Contributors: |
8 Contributors: |
9 --> |
9 --> |
10 <!DOCTYPE concept |
10 <!DOCTYPE concept |
11 PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
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; |
12 <concept id="GUID-580471E3-7DFD-5325-A8B9-B3E7FABF872D" xml:lang="en"><title>Using |
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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> |
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14 <section id="GUID-3A50A4D7-B6BD-40AB-B413-167BE7DE6DE9"><title>Using the iterator</title> <p><codeph>TDbColSetIter</codeph> provides |
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15 a useful way to iterate over the contents of a column set. Given a <codeph>CDbColSet* |
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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; |
13 for (TDbColSetIter iter(*set);iter;++iter) |
17 for (TDbColSetIter iter(*set);iter;++iter) |
14 { |
18 { |
15 if ((iter->iAttributes&TDbCol::ENotNull)==0) |
19 if ((iter->iAttributes&TDbCol::ENotNull)==0) |
16 ++nullable; |
20 ++nullable; |
17 }</codeblock> </section> </conbody></concept> |
21 }</codeblock> </section> |
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22 </conbody></concept> |