I think this syntax wouldn't be supported in SQLite based on this SO answer: 
http://stackoverflow.com/questions/1474964/using-tuples-in-sql-in-clause


Maybe there is a better way to write this query?

On Tue, May 21, 2013 at 12:13 PM, Rafael Almeida <[email protected]>
wrote:

> I would very much be able to do this query with ActiveRecord:
>     SELECT `phones`.* FROM `phones` WHERE (ddd, number) in 
> ((31,32310512),(31,96438112))
> Unfortunately, ActiveRecord gives me no way to do so with a prepared 
> statement. The intuitive way to do it would be:
>     Phone.where('(ddd, number) in (?)',  [[31,32310512],[31,96438112]])
> that does not work, as it yields:
> SELECT `phones`.* FROM `phones`  WHERE ((ddd, number) in ('---\n- 31\n- 
> 32310512\n','---\n- 31\n- 96438112\n'))
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