diff --git a/go.mod b/go.mod
index deab68d7d..dac646cdf 100644
--- a/go.mod
+++ b/go.mod
@@ -2,54 +2,34 @@ module github.com/pingcap/tidb-lightning
 
 require (
 	github.com/BurntSushi/toml v0.3.1
-	github.com/boltdb/bolt v1.3.1 // indirect
-	github.com/coreos/bbolt v1.3.0 // indirect
 	github.com/coreos/go-semver v0.2.0
 	github.com/coreos/go-systemd v0.0.0-20181031085051-9002847aa142 // indirect
 	github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f // indirect
-	github.com/cznic/golex v0.0.0-20160422121650-da5a7153a510 // indirect
 	github.com/cznic/mathutil v0.0.0-20181021201202-eba54fb065b7
-	github.com/cznic/parser v0.0.0-20181122101858-d773202d5b1f
-	github.com/cznic/sortutil v0.0.0-20150617083342-4c7342852e65
-	github.com/cznic/strutil v0.0.0-20181122101858-275e90344537
-	github.com/cznic/y v0.0.0-20181122101901-b05e8c2e8d7b
-	github.com/dgrijalva/jwt-go v3.2.0+incompatible // indirect
 	github.com/dustin/go-humanize v1.0.0 // indirect
-	github.com/eknkc/amber v0.0.0-20171010120322-cdade1c07385 // indirect
-	github.com/ghodss/yaml v1.0.0 // indirect
+	github.com/etcd-io/gofail v0.0.0-20180808172546-51ce9a71510a
 	github.com/go-sql-driver/mysql v1.4.1
 	github.com/gogo/protobuf v1.2.0
-	github.com/golang/groupcache v0.0.0-20181024230925-c65c006176ff // indirect
 	github.com/gorilla/context v1.1.1 // indirect
-	github.com/gorilla/websocket v1.4.0 // indirect
 	github.com/grpc-ecosystem/grpc-gateway v1.6.4 // indirect
 	github.com/joho/sqltocsv v0.0.0-20180904231936-b24deec2b806
-	github.com/jonboulle/clockwork v0.1.0 // indirect
 	github.com/kr/pretty v0.1.0 // indirect
 	github.com/montanaflynn/stats v0.5.0 // indirect
-	github.com/myesui/uuid v1.0.0 // indirect
-	github.com/onsi/ginkgo v1.7.0 // indirect
 	github.com/onsi/gomega v1.4.3 // indirect
 	github.com/pingcap/check v0.0.0-20171206051426-1c287c953996
 	github.com/pingcap/errors v0.11.0
-	github.com/pingcap/gofail v0.0.0-20181121072748-c3f835e5a7d8
-	github.com/pingcap/kvproto v0.0.0-20181105061835-1b5d69cd1d26
-	github.com/pingcap/parser v0.0.0-20181113072426-4a9a1b13b591
-	github.com/pingcap/tidb v0.0.0-20181120082053-012cb6da9443
-	github.com/pingcap/tidb-tools v2.1.3-0.20190115072802-b674be072353+incompatible
+	github.com/pingcap/gofail v0.0.0-20181217135706-6a951c1e42c3
+	github.com/pingcap/kvproto v0.0.0-20190226063853-f6c0b7ffff11
+	github.com/pingcap/parser v0.0.0-20190305073013-4f60445a0550
+	github.com/pingcap/tidb v0.0.0-20190309032432-ea9970968c73
+	github.com/pingcap/tidb-tools v2.1.3-0.20190116051332-34c808eef588+incompatible
 	github.com/prometheus/client_golang v0.9.2
 	github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910
+	github.com/remyoudompheng/bigfft v0.0.0-20170806203942-52369c62f446 // indirect
 	github.com/satori/go.uuid v1.2.0
 	github.com/sirupsen/logrus v1.3.0
-	github.com/soheilhy/cmux v0.1.4 // indirect
-	github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5 // indirect
-	github.com/uber-go/atomic v1.3.2 // indirect
-	github.com/ugorji/go/codec v0.0.0-20181209151446-772ced7fd4c2 // indirect
 	github.com/unrolled/render v0.0.0-20190117215946-449f39850074 // indirect
 	github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2 // indirect
-	go.uber.org/atomic v1.3.2 // indirect
-	go.uber.org/multierr v1.1.0 // indirect
-	go.uber.org/zap v1.9.1 // indirect
 	golang.org/x/text v0.3.0
 	golang.org/x/time v0.0.0-20181108054448-85acf8d2951c // indirect
 	google.golang.org/appengine v1.1.1-0.20180731164958-4216e58b9158 // indirect
diff --git a/go.sum b/go.sum
index f399ffde6..ee16472ac 100644
--- a/go.sum
+++ b/go.sum
@@ -1,246 +1,183 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/apache/thrift v0.0.0-20161221203622-b2a4d4ae21c7 h1:Fv9bK1Q+ly/ROk4aJsVMeuIwPel4bEnD8EPiI91nZMg=
+github.com/apache/thrift v0.0.0-20161221203622-b2a4d4ae21c7/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
+github.com/beorn7/perks v0.0.0-20160229213445-3ac7bf7a47d1/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 h1:xJ4a3vCFaGF/jqvzLMYoU8P317H5OQ+Via4RmuPwCS0=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
-github.com/blacktear23/go-proxyprotocol v0.0.0-20171102103907-62e368e1c470/go.mod h1:VKt7CNAQxpFpSDz3sXyj9hY/GbVsQCr0sB3w59nE7lU=
-github.com/boltdb/bolt v1.3.1 h1:JQmyP4ZBrce+ZQu0dY660FMfatumYDLun9hBCUVIkF4=
-github.com/boltdb/bolt v1.3.1/go.mod h1:clJnj/oiGkjum5o1McbSZDSLxVThjynRyGBgiAx27Ps=
+github.com/blacktear23/go-proxyprotocol v0.0.0-20180807104634-af7a81e8dd0d/go.mod h1:VKt7CNAQxpFpSDz3sXyj9hY/GbVsQCr0sB3w59nE7lU=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd h1:qMd81Ts1T2OTKmB4acZcyKaMtRnY5Y44NuXGX2GFJ1w=
-github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd/go.mod h1:sE/e/2PUdi/liOCUjSTXgM1o87ZssimdTWN964YiIeI=
-github.com/coreos/bbolt v1.3.0 h1:HIgH5xUWXT914HCI671AxuTTqjj64UOFr7pHn48LUTI=
-github.com/coreos/bbolt v1.3.0/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
-github.com/coreos/etcd v3.3.10+incompatible h1:KjVWqrZ5U0wa3CxY2AxlH6/UcB+PK2td1DcsYhA+HRs=
-github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/cockroachdb/cmux v0.0.0-20170110192607-30d10be49292/go.mod h1:qRiX68mZX1lGBkTWyp3CLcenw9I94W2dLeRvMzcn9N4=
+github.com/codahale/hdrhistogram v0.0.0-20160425231609-f8ad88b59a58 h1:hHWif/4GirK3P5uvCyyj941XSVIQDzuJhbEguCICdPE=
+github.com/codahale/hdrhistogram v0.0.0-20160425231609-f8ad88b59a58/go.mod h1:sE/e/2PUdi/liOCUjSTXgM1o87ZssimdTWN964YiIeI=
+github.com/coreos/bbolt v1.3.1-coreos.6/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
+github.com/coreos/etcd v3.2.18+incompatible h1:E8oIF72eom0bDAB74G/H31rAe1JVoiLE5NMn+WUCNLc=
+github.com/coreos/etcd v3.2.18+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-semver v0.2.0 h1:3Jm3tLmsgAYcjC+4Up7hJrFBPr+n7rAqYeSw/SZazuY=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
-github.com/coreos/go-systemd v0.0.0-20181031085051-9002847aa142 h1:3jFq2xL4ZajGK4aZY8jz+DAF0FHjI51BXjjSwCzS1Dk=
+github.com/coreos/go-systemd v0.0.0-20180202092358-40e2722dffea/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/go-systemd v0.0.0-20181031085051-9002847aa142/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
-github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f h1:lBNOc5arjvs8E5mO2tbpBpLoyyu8B6e44T7hJy6potg=
+github.com/coreos/pkg v0.0.0-20160727233714-3ac0863d7acf/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
-github.com/cznic/golex v0.0.0-20160422121650-da5a7153a510 h1:540MS5d1ysdAXqgQ78+n6sSK+v3h6Iwnx+Sj4H+rQ4I=
-github.com/cznic/golex v0.0.0-20160422121650-da5a7153a510/go.mod h1:+bmmJDNmKlhWNG+gwWCkaBoTy39Fs+bzRxVBzoTQbIc=
+github.com/cznic/mathutil v0.0.0-20160613104831-78ad7f262603/go.mod h1:e6NPNENfs9mPDVNRekM7lKScauxd5kXTr1Mfyig6TDM=
 github.com/cznic/mathutil v0.0.0-20181021201202-eba54fb065b7 h1:y+DH9ARrWiiNBV+6waYP2IPcsRbxdU1qsnycPfShF4c=
 github.com/cznic/mathutil v0.0.0-20181021201202-eba54fb065b7/go.mod h1:e6NPNENfs9mPDVNRekM7lKScauxd5kXTr1Mfyig6TDM=
-github.com/cznic/parser v0.0.0-20181122101858-d773202d5b1f h1:DUtr2TvhM9rmiHKVJWoLqDY2+MdxljW9hlaS/oYoi1c=
-github.com/cznic/parser v0.0.0-20181122101858-d773202d5b1f/go.mod h1:2B43mz36vGZNZEwkWi8ayRSSUXLfjL8OkbzwW4NcPMM=
 github.com/cznic/sortutil v0.0.0-20150617083342-4c7342852e65 h1:hxuZop6tSoOi0sxFzoGGYdRqNrPubyaIf9KoBG9tPiE=
 github.com/cznic/sortutil v0.0.0-20150617083342-4c7342852e65/go.mod h1:q2w6Bg5jeox1B+QkJ6Wp/+Vn0G/bo3f1uY7Fn3vivIQ=
-github.com/cznic/strutil v0.0.0-20181122101858-275e90344537 h1:MZRmHqDBd0vxNwenEbKSQqRVT24d3C05ft8kduSwlqM=
-github.com/cznic/strutil v0.0.0-20181122101858-275e90344537/go.mod h1:AHHPPPXTw0h6pVabbcbyGRK1DckRn7r/STdZEeIDzZc=
-github.com/cznic/y v0.0.0-20181122101901-b05e8c2e8d7b h1:gvFsf4zJcnW6GRN+HPGTxwuw+7sTwzmoeoBQQCZDEnk=
-github.com/cznic/y v0.0.0-20181122101901-b05e8c2e8d7b/go.mod h1:1rk5VM7oSnA4vjp+hrLQ3HWHa+Y4yPCa3/CsJrcNnvs=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
-github.com/dustin/go-humanize v1.0.0 h1:VSnTsYCnlFHaM2/igO1h6X3HA71jcobQuxemgkq4zYo=
+github.com/dustin/go-humanize v0.0.0-20180421182945-02af3965c54e/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
 github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
-github.com/eknkc/amber v0.0.0-20171010120322-cdade1c07385 h1:clC1lXBpe2kTj2VHdaIu9ajZQe4kcEY9j0NsnDDBZ3o=
 github.com/eknkc/amber v0.0.0-20171010120322-cdade1c07385/go.mod h1:0vRUJqYpeSZifjYj7uP3BG/gKcuzL9xWVV/Y+cK33KM=
 github.com/etcd-io/gofail v0.0.0-20180808172546-51ce9a71510a h1:QNEenQIsGDEEfFNSnN+h6hE1OwnHqTg7Dl9gEk1Cko4=
 github.com/etcd-io/gofail v0.0.0-20180808172546-51ce9a71510a/go.mod h1:49H/RkXP8pKaZy4h0d+NW16rSLhyVBt4o6VLJbmOqDE=
-github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
-github.com/ghodss/yaml v1.0.0 h1:wQHKEahhL6wmXdzwWG11gIVCkOv05bNOh+Rxn0yngAk=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/go-sql-driver/mysql v0.0.0-20170715192408-3955978caca4/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
 github.com/go-sql-driver/mysql v1.4.1 h1:g24URVg0OFbNUTx9qqY1IRZ9D9z3iPyi5zKhQZpNwpA=
 github.com/go-sql-driver/mysql v1.4.1/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
-github.com/gogo/protobuf v1.1.1 h1:72R+M5VuhED/KujmZVcIquuo8mBgX4oVda//DQb3PXo=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.2.0 h1:xU6/SpYbvkNYiptHJYEDRseDLvYE7wSqhYYNy0QSUzI=
 github.com/gogo/protobuf v1.2.0/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
-github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
-github.com/golang/groupcache v0.0.0-20181024230925-c65c006176ff h1:kOkM9whyQYodu09SJ6W3NCsHG7crFaJILQ22Gozp3lg=
 github.com/golang/groupcache v0.0.0-20181024230925-c65c006176ff/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
-github.com/golang/lint v0.0.0-20180702182130-06c8688daad7/go.mod h1:tluoj9z5200jBnyusfRPU2LqT6J+DAorxEvtC7LHB+E=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/protobuf v1.0.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.1.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db h1:woRePGFeVFfLKN/pOkfl+p/TAqKOfFu+7KPlMVpok/w=
 github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
-github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c h1:964Od4U6p2jUkFxvCydnIczKteheJEzHRToSGK3Bnlw=
-github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
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 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
diff --git a/lightning/restore/restore_test.go b/lightning/restore/restore_test.go
index 9fec16a8e..5f161e117 100644
--- a/lightning/restore/restore_test.go
+++ b/lightning/restore/restore_test.go
@@ -30,6 +30,7 @@ func (s *restoreSuite) TestNewTableRestore(c *C) {
 	}{
 		{"t1", "CREATE TABLE `t1` (`c1` varchar(5) NOT NULL)", ""},
 		{"t2", "CREATE TABLE `t2` (`c1` varchar(30000) NOT NULL)", "failed to ExecDDLSQL `mockdb`.`t2`:.*"},
+		{"t3", "CREATE TABLE `t3-a` (`c1-a` varchar(5) NOT NULL)", ""},
 	}
 
 	dbInfo := &TidbDBInfo{Name: "mockdb", Tables: map[string]*TidbTableInfo{}}