Thanks for your patch, @danzel !

@glenebob , can you please check if it is ok? It seems brackets are being used when not using prepared statements which is giving errors. Maybe those brackets were there to be used with array constructor syntax? http://www.postgresql.org/docs/9.1/static/sql-expressions.html#SQL-SYNTAX-ARRAY-CONSTRUCTORS

After checking the documentation, http://www.postgresql.org/docs/8.4/static/arrays.html the bracket notation is only used when the string ARRAY is written before the array. i.e.: (from postgresql documentation)

INSERT INTO sal_emp
    VALUES ('Bill',
    ARRAY[10000, 10000, 10000, 10000],
    ARRAY[['meeting', 'lunch'], ['training', 'presentation']]);

I think this notation format was left there by mistake because we used to use this notation but we don't use it anymore.

I conclude then that the fix proposed is correct. Merging now...

While doing the tests, I noticed another bug in Npgsql with prepared statements and IEnumerable