Flex: sqlite last_insert_rowid over multiple insert calls - apache-flex

Question

I have file with multiple SQL statements in it to be executed.
INSERT INTO reports (a,b,c) VALUES (1,2,3);
INSERT INTO units (report_id, e, f, g) VALUES ( (SELECT last_insert_rowid() FROM reports), 4, 5, 6);
INSERT INTO elements (report_id, h, i, j) VALUES ( (SELECT last_insert_rowid() FROM reports), 7, 8, 9);
The FROM reports section of the sub-selection does nothing.
What ends up happening is:
A row is inserted into reports and the reports.id field is autoincremented
A row is inserted into units with report_id being equal to the reports id
A row is inserted into elements with report_id being equal to units.id of the last row inserted
This is works as described in the sqlite documentation.
My issue is that I want all the queries subsequent to the report insert to use report.id.
Is there anyway I can get this to work on the database end without having to resort to a solution in as3?

Answer 1

There is a way to do this, but it is in AS3 using parameters.
What is done is instead of using the SELECT last_insert_row() function in each call, replace it with a parameter.
INSERT INTO elements (report_id, h, i, j) VALUES (#id, 7, 8, 9);
Now in my code I have to split the file into an array so that each individual queries is process separately (this is how AS3 implements sqlite's API).
var sqlArray:Array = sql.split(";\n\n");
Now what I do is execute the first statement for importing the report itself.
statement.text = sqlArray[0];
statement.execute();
Now the fun part. You need to get the id back out. So we run another query.
statement.text = "SELECT last_insert_rowid() as ID";
statement.execute();
var id:int = statement.getResult().data[0].id;
Now we can loop through the rest of the queries using the id as a parameter.
for(var i:int = 1; i < sqlArray.length - 1; i++) {
/**
* start at 1 because we already inserted the report
* end at length -1 because our last entry is empty because of how split works on our data
**/
statement.text = sqlArray[i];
statement.parameters['#ID'] = id;
statement.execute();
}
This is a little more complicated, but not much and it ends up working.
Everything rolled together into a single function (omitting a lot of class overhead) would be:
function importFromSQLString(sql:String):void {
try{
connection.begin();
var sqlArray:Array = sql.split(";\n\n");
statement.text = sqlArray[0];
statement.execute();
statement.text = "SELECT last_insert_rowid() as ID";
statement.execute();
var id:int = statement.getResult().data[0].id;
for(var i:int = 1; i < sqlArray.length - 1; i++) {
statement.text = sqlArray[i];
statement.parameters['#ID'] = id;
statement.execute();
}
connection.commit();
statement.clearParameters();
} catch (e:Error) {
connection.rollback(); //cleanup if there was a failure
}
}