future proofing the sqlite3 adapter code

Signed-off-by: Yehuda Katz <wycats@Yehuda-Katz.local>

activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb

@@ -193,20 +193,20 @@ module ActiveRecord
         SQL
 
         execute(sql, name).map do |row|
-          row[0]
+          row['name']
         end
       end
 
       def columns(table_name, name = nil) #:nodoc:
         table_structure(table_name).map do |field|
-          SQLiteColumn.new(field['name'], field['dflt_value'], field['type'], field['notnull'] == "0")
+          SQLiteColumn.new(field['name'], field['dflt_value'], field['type'], field['notnull'].to_i == 0)
         end
       end
 
       def indexes(table_name, name = nil) #:nodoc:
         execute("PRAGMA index_list(#{quote_table_name(table_name)})", name).map do |row|
           index = IndexDefinition.new(table_name, row['name'])
-          index.unique = row['unique'] != '0'
+          index.unique = row['unique'].to_i != 0
           index.columns = execute("PRAGMA index_info('#{index.name}')").map { |col| col['name'] }
           index
         end

activerecord/test/cases/calculations_test.rb

@@ -288,6 +288,9 @@ class CalculationsTest < ActiveRecord::TestCase
     # Oracle adapter returns floating point value 636.0 after SUM
     if current_adapter?(:OracleAdapter)
       assert_equal 636, Account.sum("2 * credit_limit")
+    elsif current_adapter?(:SQLite3Adapter)
+      # Future versions of the SQLite3 adapter will return a number
+      assert_equal 636, Account.sum("2 * credit_limit").to_i
     else
       assert_equal '636', Account.sum("2 * credit_limit")
     end

activerecord/test/cases/query_cache_test.rb

@@ -49,10 +49,16 @@ class QueryCacheTest < ActiveRecord::TestCase
   end
 
   def test_cache_does_not_wrap_string_results_in_arrays
+    require 'sqlite3/version' if current_adapter?(:SQLite3Adapter)
+
     Task.cache do
       # Oracle adapter returns count() as Fixnum or Float
       if current_adapter?(:OracleAdapter)
         assert Task.connection.select_value("SELECT count(*) AS count_all FROM tasks").is_a?(Numeric)
+      elsif current_adapter?(:SQLite3Adapter) && SQLite3::Version::VERSION > '1.2.5'
+        # Future versions of the sqlite3 adapter will return numeric
+        assert_instance_of Fixnum,
+         Task.connection.select_value("SELECT count(*) AS count_all FROM tasks")
       else
         assert_instance_of String, Task.connection.select_value("SELECT count(*) AS count_all FROM tasks")
       end