diff --git a/vendor/github.com/pingcap/parser/ast/dml.go b/vendor/github.com/pingcap/parser/ast/dml.go
index eb452a994271c2ce492b24c14c4d79f64e9aa892..0a2e7fde77186e4455a23236c31ce74f3fab43ae 100644
--- a/vendor/github.com/pingcap/parser/ast/dml.go
+++ b/vendor/github.com/pingcap/parser/ast/dml.go
@@ -118,8 +118,8 @@ func (n *Join) Restore(ctx *RestoreCtx) error {
 	ctx.JoinLevel--
 
 	if n.On != nil {
-		ctx.WriteKeyWord(" ON ")
-		if err := n.On.Expr.Restore(ctx); err != nil {
+		ctx.WritePlain(" ")
+		if err := n.On.Restore(ctx); err != nil {
 			return errors.Annotate(err, "An error occurred while restore Join.On")
 		}
 	}
@@ -325,7 +325,11 @@ type OnCondition struct {
 
 // Restore implements Node interface.
 func (n *OnCondition) Restore(ctx *RestoreCtx) error {
-	return errors.New("Not implemented")
+	ctx.WriteKeyWord("ON ")
+	if err := n.Expr.Restore(ctx); err != nil {
+		return errors.Annotate(err, "An error occurred while restore OnCondition.Expr")
+	}
+	return nil
 }
 
 // Accept implements Node Accept interface.
@@ -551,7 +555,10 @@ type TableRefsClause struct {
 
 // Restore implements Node interface.
 func (n *TableRefsClause) Restore(ctx *RestoreCtx) error {
-	return errors.New("Not implemented")
+	if err := n.TableRefs.Restore(ctx); err != nil {
+		return errors.Annotate(err, "An error occurred while restore TableRefsClause.TableRefs")
+	}
+	return nil
 }
 
 // Accept implements Node Accept interface.
diff --git a/vendor/github.com/pingcap/parser/model/ddl.go b/vendor/github.com/pingcap/parser/model/ddl.go
index e9f0f7d9aad0c573e296104ff8eb6370dde15ff6..3c01dad230cd66da82914636900f4a3e99644301 100644
--- a/vendor/github.com/pingcap/parser/model/ddl.go
+++ b/vendor/github.com/pingcap/parser/model/ddl.go
@@ -53,6 +53,7 @@ const (
 	ActionCreateView                   ActionType = 21
 	ActionModifyTableCharsetAndCollate ActionType = 22
 	ActionTruncateTablePartition       ActionType = 23
+	ActionDropView                     ActionType = 24
 )
 
 // AddIndexStr is a string related to the operation of "add index".
@@ -82,6 +83,7 @@ var actionMap = map[ActionType]string{
 	ActionCreateView:                   "create view",
 	ActionModifyTableCharsetAndCollate: "modify table charset and collate",
 	ActionTruncateTablePartition:       "truncate partition",
+	ActionDropView:                     "drop view",
 }
 
 // String return current ddl action in string
diff --git a/vendor/vendor.json b/vendor/vendor.json
index 78b1d959d3a28b3dc54dd01aa072f62c4bdfb6c0..1e754296dcd124f216cfe02304a874ea89b4d55c 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -113,104 +113,104 @@
 		{
 			"checksumSHA1": "KLFQyY05NrGhQCM+Lthp/X9/YcE=",
 			"path": "github.com/pingcap/parser",
-			"revision": "60752e9154861ea1890cff3cdf84e75e67b02281",
-			"revisionTime": "2018-12-26T14:52:28Z"
+			"revision": "a4bdcab31117b4b4cbfbdb792307e3332534950d",
+			"revisionTime": "2018-12-28T02:29:38Z"
 		},
 		{
-			"checksumSHA1": "s7vZWQ/fyhgaPag6j8hQnZ3t3SY=",
+			"checksumSHA1": "IkdWWfeUBw+gwiERRCMHYSBb8aA=",
 			"path": "github.com/pingcap/parser/ast",
-			"revision": "60752e9154861ea1890cff3cdf84e75e67b02281",
-			"revisionTime": "2018-12-26T14:52:28Z"
+			"revision": "a4bdcab31117b4b4cbfbdb792307e3332534950d",
+			"revisionTime": "2018-12-28T02:29:38Z"
 		},
 		{
 			"checksumSHA1": "skWGV4FNvD3vr+5olepaPPnylUw=",
 			"path": "github.com/pingcap/parser/auth",
-			"revision": "60752e9154861ea1890cff3cdf84e75e67b02281",
-			"revisionTime": "2018-12-26T14:52:28Z"
+			"revision": "a4bdcab31117b4b4cbfbdb792307e3332534950d",
+			"revisionTime": "2018-12-28T02:29:38Z"
 		},
 		{
 			"checksumSHA1": "t4UHo966WzU9Z0IJkyGHRp0loOk=",
 			"path": "github.com/pingcap/parser/charset",
-			"revision": "60752e9154861ea1890cff3cdf84e75e67b02281",
-			"revisionTime": "2018-12-26T14:52:28Z"
+			"revision": "a4bdcab31117b4b4cbfbdb792307e3332534950d",
+			"revisionTime": "2018-12-28T02:29:38Z"
 		},
 		{
 			"checksumSHA1": "SInoXbsRe0tnBwmatmtZYfSFbdk=",
 			"path": "github.com/pingcap/parser/format",
-			"revision": "60752e9154861ea1890cff3cdf84e75e67b02281",
-			"revisionTime": "2018-12-26T14:52:28Z"
+			"revision": "a4bdcab31117b4b4cbfbdb792307e3332534950d",
+			"revisionTime": "2018-12-28T02:29:38Z"
 		},
 		{
-			"checksumSHA1": "WZYTGDMnc1UfTdjdZoBbISsnpRY=",
+			"checksumSHA1": "fMXmawvMELfwCuO/vrNtkUjQN/0=",
 			"path": "github.com/pingcap/parser/model",
-			"revision": "60752e9154861ea1890cff3cdf84e75e67b02281",
-			"revisionTime": "2018-12-26T14:52:28Z"
+			"revision": "a4bdcab31117b4b4cbfbdb792307e3332534950d",
+			"revisionTime": "2018-12-28T02:29:38Z"
 		},
 		{
 			"checksumSHA1": "QBa9yiMDQNl2cLLwqlRoNTpCPNg=",
 			"path": "github.com/pingcap/parser/mysql",
-			"revision": "60752e9154861ea1890cff3cdf84e75e67b02281",
-			"revisionTime": "2018-12-26T14:52:28Z"
+			"revision": "a4bdcab31117b4b4cbfbdb792307e3332534950d",
+			"revisionTime": "2018-12-28T02:29:38Z"
 		},
 		{
 			"checksumSHA1": "mxpiJJ3b08I0o0Sd2rJLYMwz7uw=",
 			"path": "github.com/pingcap/parser/opcode",
-			"revision": "60752e9154861ea1890cff3cdf84e75e67b02281",
-			"revisionTime": "2018-12-26T14:52:28Z"
+			"revision": "a4bdcab31117b4b4cbfbdb792307e3332534950d",
+			"revisionTime": "2018-12-28T02:29:38Z"
 		},
 		{
 			"checksumSHA1": "XvnUllvwMYd6HrMvMiKnn4cGN2M=",
 			"path": "github.com/pingcap/parser/terror",
-			"revision": "60752e9154861ea1890cff3cdf84e75e67b02281",
-			"revisionTime": "2018-12-26T14:52:28Z"
+			"revision": "a4bdcab31117b4b4cbfbdb792307e3332534950d",
+			"revisionTime": "2018-12-28T02:29:38Z"
 		},
 		{
 			"checksumSHA1": "YoDiJ3sniNqxkP5X/BDkx6efteA=",
 			"path": "github.com/pingcap/parser/types",
-			"revision": "60752e9154861ea1890cff3cdf84e75e67b02281",
-			"revisionTime": "2018-12-26T14:52:28Z"
+			"revision": "a4bdcab31117b4b4cbfbdb792307e3332534950d",
+			"revisionTime": "2018-12-28T02:29:38Z"
 		},
 		{
 			"checksumSHA1": "Uv9aqrZqzNFUgUferYPfNGUxOmM=",
 			"path": "github.com/pingcap/tidb/sessionctx/stmtctx",
-			"revision": "e45e6999cbd29fbd14cf8c93669b2e45907b4154",
-			"revisionTime": "2018-12-27T06:12:19Z"
+			"revision": "71088815e7c5121e069d7ec10595d176a44b9bea",
+			"revisionTime": "2018-12-27T09:14:04Z"
 		},
 		{
 			"checksumSHA1": "kXyszfR2fQ6bHvuCCFlHRkt1mF0=",
 			"path": "github.com/pingcap/tidb/types",
-			"revision": "e45e6999cbd29fbd14cf8c93669b2e45907b4154",
-			"revisionTime": "2018-12-27T06:12:19Z"
+			"revision": "71088815e7c5121e069d7ec10595d176a44b9bea",
+			"revisionTime": "2018-12-27T09:14:04Z"
 		},
 		{
 			"checksumSHA1": "DWVD7+ygtT66IQ+cqXmMJ5OVqUk=",
 			"path": "github.com/pingcap/tidb/types/json",
-			"revision": "e45e6999cbd29fbd14cf8c93669b2e45907b4154",
-			"revisionTime": "2018-12-27T06:12:19Z"
+			"revision": "71088815e7c5121e069d7ec10595d176a44b9bea",
+			"revisionTime": "2018-12-27T09:14:04Z"
 		},
 		{
 			"checksumSHA1": "6vi/eCZXqNTa5eAUpxDZet4LPlY=",
 			"path": "github.com/pingcap/tidb/types/parser_driver",
-			"revision": "e45e6999cbd29fbd14cf8c93669b2e45907b4154",
-			"revisionTime": "2018-12-27T06:12:19Z"
+			"revision": "71088815e7c5121e069d7ec10595d176a44b9bea",
+			"revisionTime": "2018-12-27T09:14:04Z"
 		},
 		{
 			"checksumSHA1": "SS7twHZofFKr8w/pwIKmkp3u5qU=",
 			"path": "github.com/pingcap/tidb/util/execdetails",
-			"revision": "e45e6999cbd29fbd14cf8c93669b2e45907b4154",
-			"revisionTime": "2018-12-27T06:12:19Z"
+			"revision": "71088815e7c5121e069d7ec10595d176a44b9bea",
+			"revisionTime": "2018-12-27T09:14:04Z"
 		},
 		{
 			"checksumSHA1": "nUC7zVoAMNR2a+z2iGqHoN2AkFE=",
 			"path": "github.com/pingcap/tidb/util/hack",
-			"revision": "e45e6999cbd29fbd14cf8c93669b2e45907b4154",
-			"revisionTime": "2018-12-27T06:12:19Z"
+			"revision": "71088815e7c5121e069d7ec10595d176a44b9bea",
+			"revisionTime": "2018-12-27T09:14:04Z"
 		},
 		{
 			"checksumSHA1": "xSyepiuqsoaaeDch7cXeumvVHKM=",
 			"path": "github.com/pingcap/tidb/util/memory",
-			"revision": "e45e6999cbd29fbd14cf8c93669b2e45907b4154",
-			"revisionTime": "2018-12-27T06:12:19Z"
+			"revision": "71088815e7c5121e069d7ec10595d176a44b9bea",
+			"revisionTime": "2018-12-27T09:14:04Z"
 		},
 		{
 			"checksumSHA1": "SmYeIK/fIYXNu8IKxD6HOVQVTuU=",