a couple of fixes for 64bit platforms

Author: brianmario

ext/mysql2/result.c

@@ -26,6 +26,12 @@ static rb_encoding *binaryEncoding;
  * (0*31557600) + (1*2592000) + (1*86400) + (0*3600) + (0*60) + 0
  */
 #define MYSQL2_MIN_TIME 2678400ULL
+#elif SIZEOF_INT < SIZEOF_LONG // 64bit Ruby 1.8
+/* 0139-1-1 00:00:00 UTC
+ *
+ * (139*31557600) + (1*2592000) + (1*86400) + (0*3600) + (0*60) + 0
+ */
+#define MYSQL2_MIN_TIME 4389184800ULL
 #elif defined(NEGATIVE_TIME_T)
 /* 1901-12-13 20:45:52 UTC : The oldest time in 32-bit signed time_t.
  *

spec/mysql2/result_spec.rb

@@ -200,14 +200,31 @@
         r.first['test'].class.should eql(klass)
       end
     elsif 1.size == 8 # 64bit
-      it "should return Time when timestamp is < 1901-12-13 20:45:52" do
-        r = @client.query("SELECT CAST('1901-12-13 20:45:51' AS DATETIME) as test")
-        r.first['test'].class.should eql(Time)
-      end
+      if RUBY_VERSION =~ /1.9/
+        it "should return Time when timestamp is < 1901-12-13 20:45:52" do
+          r = @client.query("SELECT CAST('1901-12-13 20:45:51' AS DATETIME) as test")
+          r.first['test'].class.should eql(Time)
+        end
 
-      it "should return Time when timestamp is > 2038-01-19T03:14:07" do
-        r = @client.query("SELECT CAST('2038-01-19 03:14:08' AS DATETIME) as test")
-        r.first['test'].class.should eql(Time)
+        it "should return Time when timestamp is > 2038-01-19T03:14:07" do
+          r = @client.query("SELECT CAST('2038-01-19 03:14:08' AS DATETIME) as test")
+          r.first['test'].class.should eql(Time)
+        end
+      else
+        it "should return Time when timestamp is > 0138-12-31 11:59:59" do
+          r = @client.query("SELECT CAST('0139-1-1 00:00:00' AS DATETIME) as test")
+          r.first['test'].class.should eql(Time)
+        end
+
+        it "should return DateTime when timestamp is < 0139-1-1T00:00:00" do
+          r = @client.query("SELECT CAST('0138-12-31 11:59:59' AS DATETIME) as test")
+          r.first['test'].class.should eql(DateTime)
+        end
+
+        it "should return Time when timestamp is > 2038-01-19T03:14:07" do
+          r = @client.query("SELECT CAST('2038-01-19 03:14:08' AS DATETIME) as test")
+          r.first['test'].class.should eql(Time)
+        end
       end
     end