Collapse all Symbian^3 Application Developer Library

Using TDbColSetIter

Provides a code snippet to show you how to use the TDbColSetIter iterator.

Using the iterator

TDbColSetIter provides a useful way to iterate over the contents of a column set. Given a CDbColSet* set , we can count the number of nullable columns like this:

       
        
       
       TInt nullable=0;
for (TDbColSetIter iter(*set);iter;++iter)
    {
    if ((iter->iAttributes&TDbCol::ENotNull)==0)
        ++nullable;
    }

Parent topic: DBMS columns, column sets, and keys