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Question by MZGS · Mar 21, 2012 at 03:56 PM · c#databasesqlitesqlattach

SQLite3 AttachDatabase command won't work

I'm attempting to connect two SQLite databases in a Unity3d project and I am running into some trouble.

My database paths and file names are correct (checked and confirmed), and I am able to query/insert/etc... from each of the databases individually. However, when I run the ATTACH command, it returns an error stating that my SQL logic is invalid. I have looked at many references and examples, all of which indicate that my command should run as anticipated.


Here is some relevant code:

 //open TEMP database
 DBAccess.OpenOrCreateDB("/Resources/Data/SaveGames/" + GameController.user.username +   
     "/", GameController.user.username + "_TEMP");
 
 //attach SAVEGAME database and transfer data from TEMP database
 DBAccess.NonQuery("ATTACH DATABASE '" + Application.dataPath + "/Resources/GameData/" 
     + GameController.user.username + "/" + GameController.user.username + DBAccess.DBEXT 
     + "' AS LOAD_DB;");
 
 //copy records from TEMP database to save game database 
 (omitted because not relevant to issue)    
 
 //detach SAVEGAME database
 DBAccess.NonQuery("PRAGMA LOAD_DB.journal_mode=delete; DETACH DATABASE LOAD_DB;");  
 
 //close database
 DBAccess.CloseDB();
 The goal with this is to copy the in-game changes database to the player's save game database file.


My error debugging prints out the following:

 DBAccess -- Cannot perform command with statement: <ATTACH '/Users/scottwindsor/ADITL/
 Assets/Resources/GameData/New User/New User.db' AS LOAD_DB;>


It would seem that my SQL command should work... Has anyone tried to do this inside Unity? Any help would be appreciated.

Tech Specs:

  • Language: C#

  • SQL: SQLite3.dll

  • Using IDBCommand.ExecuteNonQuery() to send non-query commands to the database.

  • Using IDBCommand.ExecuteReader() to send all other commands/queries to the database.

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