SQLite statement CREATE TABLE with binding rowid
Kofr last edited by Kofr
I am not a guru of SQL yet. So I come across with a problem:
I need to execute SQL statement in context of using Qt as follows:
CREATE TABLE IF NOT EXISTS tasks (taskId INTEGER PRIMARY KEY DEFAULT numeric_literal)
And I need to bind
numeric_literalto Value from C++ code/
It is not clear for me how to implement this.
Something like that:
int taskIdFromCppCode = valueForInitialization; QSqlQuery query; query.prepare("CREATE TABLE IF NOT EXISTS tasks (taskId INTEGER PRIMARY KEY DEFAULT taskid " "VALUES (:taskid)"); query.bindValue(":taskid", taskIdFromCppCode ); query.exec();
Is that right approach or how to fill the table with my own rowids?
Your SQL is incorrect. Create the table and then insert the rows.
QSqlQuery query("CREATE TABLE tasks (taskId INTEGER, PRIMARY KEY(taskId))"); if (!query.exec()) ; //< Handle error - table couldn't be created query.prepare("INSERT INTO tasks (taskId) VALUES (:id)"); // From here on you can have multiple calls to the same piece of code to insert multiple rows query.bindValue(":id", valueForInitialization); if (!query.exec()) ; //< Handle error - can't insert row
Additionally, I advise you to create the table once and for all. Then just fill it up, instead of trying to create it on every row insertion.