Question

I’m trying to check if the value exists in a column. For example I want to check that column artId contains some numeric value. I’m using following code:

getStar = db.query(TABLE_NAME, new String[] { "artId" },
                        "artId = " + entryId, null, null,
                        null, null);
        getStar.moveToFirst();
        String star = getStar.toString();
        Log.w("ID COUNT", star);
        if(getStar != null) {
            // do something
        }

Where entryId is some number.

But I always get something like this:

W/ID COUNT(11303): android.database.sqlite.SQLiteCursor@41aa4c80.

Also I tried to use:

getStar = db.rawQuery("SELECT count(*) FROM "
+ TABLE_NAME + " WHERE artId = '" + entryId + "'", null);

But I got the same result.

So I hope for your help.

Answer 1

The Cursor is valid (non-null), yes, because it has no errors. Check if it has any data, instead.

getStar = db.rawQuery("SELECT count(*) FROM " + TABLE_NAME + " WHERE artId = '" + entryId + "'", null);
getStar.moveToFirst();
if (getStar.getInt(0)) { // This will get the integer value of the COUNT(*)
    // It has data
}

I’m a bit unsure of the results of the above; instead, you could query the number of results:

getStar = db.rawQuery("SELECT * FROM " + TABLE_NAME + " WHERE artId = '" + entryId + "'", null);
if (getStar.getCount() > 0) { // This will get the number of rows
    // It has data
}