Properly update field's ENUM/SET type when binary collation is used

Signed-off-by: Matt Lord <mattalord@gmail.com>

go/mysql/binlog/rbr.go

@@ -697,8 +697,11 @@ func CellValue(data []byte, pos int, typ byte, metadata uint16, field *querypb.F
  // metadata. If it's a string, then there will be more bits.
  t := metadata >> 8
  if t == TypeEnum {
- // We don't know the string values. So just use the
- // numbers.
+ // Update the field's type to ensure proper handling in
+ // upper layers.
+ field.Type = querypb.Type_ENUM
+ // We don't know the string values. Those will be filled
+ // in upper layers.
  switch metadata & 0xff {
  case 1:
  // One byte storage.
@@ -714,6 +717,9 @@ func CellValue(data []byte, pos int, typ byte, metadata uint16, field *querypb.F
  }
  }
  if t == TypeSet {
+ // Update the field's type to ensure proper handling in
+ // upper layers.
+ field.Type = querypb.Type_SET
  // We don't know the set values. So just use the
  // numbers.
  l := int(metadata & 0xff)