ALTER TABLE ADD COLUMN IF NOT EXISTS in SQLite

Question

We\'ve recently had the need to add columns to a few of our existing SQLite database tables. This can be done with ALTER TABLE ADD COLUMN. Of course, if the table has alre

Answer 1

I took the answer above in C#/.Net, and rewrote it for Qt/C++, not to much changed, but I wanted to leave it here for anyone in the future looking for a C++'ish' answer.

    bool MainWindow::isColumnExisting(QString &table, QString &columnName){

    QSqlQuery q;

    try {
        if(q.exec("PRAGMA table_info("+ table +")"))
            while (q.next()) {
                QString name = q.value("name").toString();     
                if (columnName.toLower() == name.toLower())
                    return true;
            }

    } catch(exception){
        return false;
    }
    return false;
}