New Tests (#13)

* Return missing text description for numeric column types.

* Add new setup and teardown features to make it easier to add more
complex tests.

In error messages, don't print Vertica's internal method name anymore.

* Externalized a few more setup/teardown test sql scripts to make
the code a cleaner.

Changed TZ connection log message from INFO to DEBUG.

* Added value type test coverage.

Changed so binary, varbinary, long varbinary now return hex-encoded
strings instead as it is more readable.

Changed so null binary, varbinary, long varbinary return objects
of sql.NullString type instead of "".

Changed so null time and timeTZ return objects of sql.NullString type
instead of nil.

* Removed non-working test.

Author: huebnerr

common/types.go

@@ -91,6 +91,8 @@ func ColumnTypeString(typeOID uint32) string {
 		return "long varbinary"
 	case ColTypeBinary:
 		return "binary"
+	case ColTypeNumeric:
+		return "numeric"
 	}
 
 	return fmt.Sprintf("unknown column type oid: %d", typeOID)

connection.go

@@ -303,7 +303,7 @@ func (v *connection) handshake() error {
 	}
 }
 
-// We have to be tricky here since we're inside of a connection, but tring to use interfaces of the
+// We have to be tricky here since we're inside of a connection, but trying to use interfaces of the
 // driver class.
 func (v *connection) initializeSession() error {
 
@@ -332,7 +332,7 @@ func (v *connection) initializeSession() error {
 
 	v.serverTZOffset = str[len(str)-3:]
 
-	connectionLogger.Info("Setting server timezone offset to %s", str[len(str)-3:])
+	connectionLogger.Debug("Setting server timezone offset to %s", str[len(str)-3:])
 
 	return nil
 }