Android：sqlite_master总是返回空光标

Question

I am trying to get a list of all of the tables in a database at runtime in my app, so I am using this command:

select * from sqlite_master;

However, no matter what, the resulting Cursor is empty. I know there are tables in the database because I can read and write from them, and this very same query returns what I expect when run it in the adb shell.

What could I be missing?

Answer 1

I had a similar problem that I was scratching my head about for a while, but it simply turned out that I hadn't opened the database. Just a reminder for whomever else looks at this question.

Answer 2

Just a guess. Do you maybe use the same sqlite connection from two seperated threads? If you do, that's the problem .

Good luck.

Answer 3

How about this.

SELECT name FROM 
   (SELECT * FROM sqlite_master UNION ALL
    SELECT * FROM sqlite_temp_master)
WHERE type='table'
ORDER BY name