Incorrect cast date to int

[overvenus]

1. What version of Go are you using (go version)?

   go version go1.5.3 linux/amd64

2. What operating system and processor architecture are you using (go env)?

   $ go env
   GOARCH="amd64"
   GOBIN=""
   GOEXE=""
   GOHOSTARCH="amd64"
   GOHOSTOS="linux"
   GOOS="linux"
   GOPATH="/home/neil/repo/gopath"
   GORACE=""
   GOROOT="/usr/local/go"
   GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
   GO15VENDOREXPERIMENT=""
   CC="gcc"
   GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0"
   CXX="g++"
   CGO_ENABLED="1"
   
   $ tidb-server/tidb-server -h
   Welcome to the TiDB.
   Version:
   Git Commit Hash: 8aa1055ceb3db20785957056375787be7cf73709
   UTC Build Time:  2016-04-02 07:26:11
   ...

3. What did you do?

   tidb> select current_date, current_date+1;
   +--------------+----------------+
   | current_date | current_date+1 |
   +--------------+----------------+
   | 2016-04-02   | 20160402000001 |
   +--------------+----------------+
   1 row in set (0.00 sec)
   

4. What did you expect to see?

   mysql> select current_date, current_date+1;
   +--------------+----------------+
   | current_date | current_date+1 |
   +--------------+----------------+
   | 2016-04-02   |       20160403 |
   +--------------+----------------+
   1 row in set (0.00 sec)
   

5. What did you see instead?

   see Q.3

[overvenus]

Fixed. See #1047