Question

I am trying to update my database to have another column called Visible. I want the entire column to be filled with false values. When I run the code, it gets to the update function and kicks out the following error:

android.database.sqlite.SQLiteException: no such column: true: UPDATE Themes2 SET Visibility = true;

private static final String TABLE_THEMES_V2 = "Themes2";
public static final String KEY_VISIBLE = "Visibility";

if (oldVersion < 8) {

            db.execSQL("ALTER TABLE " + TABLE_THEMES_V2 + " ADD COLUMN " + KEY_VISIBLE + " text");
            db.execSQL("UPDATE " + TABLE_THEMES_V2 + " SET " + KEY_VISIBLE + " = true;");

            db.setTransactionSuccessful();
        }

Does anyone know what’s wrong? I used this same function a long time ago to input “1”s in the columns…

Answer 1

Your KEY_VISIBLE column is having Text data-type so you should update it with following syntax,

db.execSQL("UPDATE " + TABLE_THEMES_V2 + " SET " + KEY_VISIBLE + " = 'true';");

You are just missing ' single inverted mark in String value.

The alternate way you can try is as follows, by making your KEY_VISIBLE column to integer type

db.execSQL("ALTER TABLE " + TABLE_THEMES_V2 + " ADD COLUMN " + KEY_VISIBLE + " INTEGER");
db.execSQL("UPDATE " + TABLE_THEMES_V2 + " SET " + KEY_VISIBLE + " = 1;"); // for True
db.execSQL("UPDATE " + TABLE_THEMES_V2 + " SET " + KEY_VISIBLE + " = 0;"); // for False