I’m using Ruby 1.9.1 and sqlite3 with sqlite3-Ruby (1.2.5)
Doing the following query:
pc1 = db.execute(“select count(*) from mytab where(n2=n1)”)
I get say: pc1 = [[“123”]]
A SQL select in general returns multiple rows, each of which has
So it’s returning an array of rows, with one member, which is an array
of columns, with one member.
and when using:
pc1 = db.get_first_row(“select count(*) from mytab where(n2=n1)”)
I get say: pc1 = [“123”]
Here you explicitly asked only for the first row, so you get an array of
columns, with one member.
What I really want is the numeric value alone without the
square brackets, quotes, and the like, as several queries are
‘chained’ and this gets really annoying.
Pull it out, using
pc1 = db.execute(…).to_i
pc1 = db.execute(…).first.first.to_i
Note this will raise an exception if you get zero rows returned for some
reason, but in this particular query you shouldn’t.
to_i is required because sqlite only implements text types.
Ruby 1.8.7 doesn’t exibit that behaviour and work as expected.
You need to show exactly what code you are running under both 1.9.1 and
1.8.7, and exactly what return values you get in both cases (p pc1, or
puts pc1.inspect), and also show exactly what versions of the sqlite3
gem you have in both cases.