diff --git a/cmd/importer/parser.go b/cmd/importer/parser.go
index a1b0d4f2a4..4b7ee01b84 100644
--- a/cmd/importer/parser.go
+++ b/cmd/importer/parser.go
@@ -275,7 +275,7 @@ func parseIndex(table *table, stmt *ast.CreateIndexStmt) error {
 	if table.name != stmt.Table.Name.L {
 		return errors.Errorf("mismatch table name for create index - %s : %s", table.name, stmt.Table.Name.L)
 	}
-	for _, indexCol := range stmt.IndexColNames {
+	for _, indexCol := range stmt.IndexPartSpecifications {
 		name := indexCol.Column.Name.L
 		if stmt.KeyType == ast.IndexKeyTypeUnique {
 			table.uniqIndices[name] = table.findCol(table.columns, name)
diff --git a/ddl/column.go b/ddl/column.go
index 8662369216..743f742231 100644
--- a/ddl/column.go
+++ b/ddl/column.go
@@ -609,7 +609,7 @@ func generateOriginDefaultValue(col *model.ColumnInfo) (interface{}, error) {
 	return odValue, nil
 }
 
-func findColumnInIndexCols(c string, cols []*ast.IndexColName) bool {
+func findColumnInIndexCols(c string, cols []*ast.IndexPartSpecification) bool {
 	for _, c1 := range cols {
 		if c == c1.Column.Name.L {
 			return true
diff --git a/ddl/db_integration_test.go b/ddl/db_integration_test.go
index 4fabc86e74..277524ff32 100644
--- a/ddl/db_integration_test.go
+++ b/ddl/db_integration_test.go
@@ -1010,7 +1010,7 @@ func (s *testIntegrationSuite5) TestBackwardCompatibility(c *C) {
 
 	unique := false
 	indexName := model.NewCIStr("idx_b")
-	idxColName := &ast.IndexColName{
+	idxColName := &ast.IndexPartSpecification{
 		Column: &ast.ColumnName{
 			Schema: schemaName,
 			Table:  tableName,
@@ -1018,7 +1018,7 @@ func (s *testIntegrationSuite5) TestBackwardCompatibility(c *C) {
 		},
 		Length: types.UnspecifiedLength,
 	}
-	idxColNames := []*ast.IndexColName{idxColName}
+	idxColNames := []*ast.IndexPartSpecification{idxColName}
 	var indexOption *ast.IndexOption
 	job := &model.Job{
 		SchemaID:   schema.ID,
diff --git a/ddl/ddl.go b/ddl/ddl.go
index fcacfbb6b1..f791c02d1b 100644
--- a/ddl/ddl.go
+++ b/ddl/ddl.go
@@ -237,7 +237,7 @@ type DDL interface {
 	RecoverTable(ctx sessionctx.Context, tbInfo *model.TableInfo, schemaID, autoID, dropJobID int64, snapshotTS uint64) (err error)
 	DropView(ctx sessionctx.Context, tableIdent ast.Ident) (err error)
 	CreateIndex(ctx sessionctx.Context, tableIdent ast.Ident, keyType ast.IndexKeyType, indexName model.CIStr,
-		columnNames []*ast.IndexColName, indexOption *ast.IndexOption, ifNotExists bool) error
+		columnNames []*ast.IndexPartSpecification, indexOption *ast.IndexOption, ifNotExists bool) error
 	DropIndex(ctx sessionctx.Context, tableIdent ast.Ident, indexName model.CIStr, ifExists bool) error
 	AlterTable(ctx sessionctx.Context, tableIdent ast.Ident, spec []*ast.AlterTableSpec) error
 	TruncateTable(ctx sessionctx.Context, tableIdent ast.Ident) error
diff --git a/ddl/ddl_api.go b/ddl/ddl_api.go
index db16bcb555..923fd2bdfa 100644
--- a/ddl/ddl_api.go
+++ b/ddl/ddl_api.go
@@ -514,7 +514,7 @@ func columnDefToCol(ctx sessionctx.Context, offset int, colDef *ast.ColumnDef, o
 	if colDef.Options != nil {
 		length := types.UnspecifiedLength
 
-		keys := []*ast.IndexColName{
+		keys := []*ast.IndexPartSpecification{
 			{
 				Column: colDef.Name,
 				Length: length,
@@ -3300,7 +3300,7 @@ func getAnonymousIndex(t table.Table, colName model.CIStr) model.CIStr {
 }
 
 func (d *ddl) CreatePrimaryKey(ctx sessionctx.Context, ti ast.Ident, indexName model.CIStr,
-	idxColNames []*ast.IndexColName, indexOption *ast.IndexOption) error {
+	idxColNames []*ast.IndexPartSpecification, indexOption *ast.IndexOption) error {
 	if !config.GetGlobalConfig().AlterPrimaryKey {
 		return ErrUnsupportedModifyPrimaryKey.GenWithStack("Unsupported add primary key, alter-primary-key is false")
 	}
@@ -3362,7 +3362,7 @@ func (d *ddl) CreatePrimaryKey(ctx sessionctx.Context, ti ast.Ident, indexName m
 }
 
 func (d *ddl) CreateIndex(ctx sessionctx.Context, ti ast.Ident, keyType ast.IndexKeyType, indexName model.CIStr,
-	idxColNames []*ast.IndexColName, indexOption *ast.IndexOption, ifNotExists bool) error {
+	idxColNames []*ast.IndexPartSpecification, indexOption *ast.IndexOption, ifNotExists bool) error {
 
 	// not support Spatial and FullText index
 	if keyType == ast.IndexKeyTypeFullText || keyType == ast.IndexKeyTypeSpatial {
@@ -3432,8 +3432,8 @@ func (d *ddl) CreateIndex(ctx sessionctx.Context, ti ast.Ident, keyType ast.Inde
 	return errors.Trace(err)
 }
 
-func buildFKInfo(fkName model.CIStr, keys []*ast.IndexColName, refer *ast.ReferenceDef, cols []*table.Column, tbInfo *model.TableInfo) (*model.FKInfo, error) {
-	if len(keys) != len(refer.IndexColNames) {
+func buildFKInfo(fkName model.CIStr, keys []*ast.IndexPartSpecification, refer *ast.ReferenceDef, cols []*table.Column, tbInfo *model.TableInfo) (*model.FKInfo, error) {
+	if len(keys) != len(refer.IndexPartSpecifications) {
 		return nil, infoschema.ErrForeignKeyNotMatch.GenWithStackByArgs("foreign key without name")
 	}
 
@@ -3495,8 +3495,8 @@ func buildFKInfo(fkName model.CIStr, keys []*ast.IndexColName, refer *ast.Refere
 		fkInfo.Cols[i] = key.Column.Name
 	}
 
-	fkInfo.RefCols = make([]model.CIStr, len(refer.IndexColNames))
-	for i, key := range refer.IndexColNames {
+	fkInfo.RefCols = make([]model.CIStr, len(refer.IndexPartSpecifications))
+	for i, key := range refer.IndexPartSpecifications {
 		fkInfo.RefCols[i] = key.Column.Name
 	}
 
@@ -3506,7 +3506,7 @@ func buildFKInfo(fkName model.CIStr, keys []*ast.IndexColName, refer *ast.Refere
 	return fkInfo, nil
 }
 
-func (d *ddl) CreateForeignKey(ctx sessionctx.Context, ti ast.Ident, fkName model.CIStr, keys []*ast.IndexColName, refer *ast.ReferenceDef) error {
+func (d *ddl) CreateForeignKey(ctx sessionctx.Context, ti ast.Ident, fkName model.CIStr, keys []*ast.IndexPartSpecification, refer *ast.ReferenceDef) error {
 	is := d.infoHandle.Get()
 	schema, ok := is.SchemaByName(ti.Schema)
 	if !ok {
diff --git a/ddl/ddl_test.go b/ddl/ddl_test.go
index 6eb35c41a6..4b6abc5f7f 100644
--- a/ddl/ddl_test.go
+++ b/ddl/ddl_test.go
@@ -186,7 +186,7 @@ func buildCreateIdxJob(dbInfo *model.DBInfo, tblInfo *model.TableInfo, unique bo
 		Type:       model.ActionAddIndex,
 		BinlogInfo: &model.HistoryInfo{},
 		Args: []interface{}{unique, model.NewCIStr(indexName),
-			[]*ast.IndexColName{{
+			[]*ast.IndexPartSpecification{{
 				Column: &ast.ColumnName{Name: model.NewCIStr(colName)},
 				Length: types.UnspecifiedLength}}},
 	}
diff --git a/ddl/ddl_worker_test.go b/ddl/ddl_worker_test.go
index b202009ab8..75ef3bd29d 100644
--- a/ddl/ddl_worker_test.go
+++ b/ddl/ddl_worker_test.go
@@ -252,14 +252,14 @@ func (s *testDDLSuite) TestIndexError(c *C) {
 	doDDLJobErr(c, dbInfo.ID, tblInfo.ID, model.ActionAddIndex, []interface{}{1}, ctx, d)
 	doDDLJobErr(c, dbInfo.ID, tblInfo.ID, model.ActionAddIndex,
 		[]interface{}{false, model.NewCIStr("t"), 1,
-			[]*ast.IndexColName{{Column: &ast.ColumnName{Name: model.NewCIStr("c")}, Length: 256}}}, ctx, d)
+			[]*ast.IndexPartSpecification{{Column: &ast.ColumnName{Name: model.NewCIStr("c")}, Length: 256}}}, ctx, d)
 	doDDLJobErr(c, dbInfo.ID, tblInfo.ID, model.ActionAddIndex,
 		[]interface{}{false, model.NewCIStr("c1_index"), 1,
-			[]*ast.IndexColName{{Column: &ast.ColumnName{Name: model.NewCIStr("c")}, Length: 256}}}, ctx, d)
+			[]*ast.IndexPartSpecification{{Column: &ast.ColumnName{Name: model.NewCIStr("c")}, Length: 256}}}, ctx, d)
 	testCreateIndex(c, ctx, d, dbInfo, tblInfo, false, "c1_index", "c1")
 	doDDLJobErr(c, dbInfo.ID, tblInfo.ID, model.ActionAddIndex,
 		[]interface{}{false, model.NewCIStr("c1_index"), 1,
-			[]*ast.IndexColName{{Column: &ast.ColumnName{Name: model.NewCIStr("c1")}, Length: 256}}}, ctx, d)
+			[]*ast.IndexPartSpecification{{Column: &ast.ColumnName{Name: model.NewCIStr("c1")}, Length: 256}}}, ctx, d)
 
 	// for dropping index
 	doDDLJobErr(c, dbInfo.ID, tblInfo.ID, model.ActionDropIndex, []interface{}{1}, ctx, d)
@@ -592,7 +592,7 @@ func (s *testDDLSuite) TestCancelJob(c *C) {
 	updateTest(&tests[0])
 	idxOrigName := "idx"
 	validArgs := []interface{}{false, model.NewCIStr(idxOrigName),
-		[]*ast.IndexColName{{
+		[]*ast.IndexPartSpecification{{
 			Column: &ast.ColumnName{Name: model.NewCIStr("c1")},
 			Length: -1,
 		}}, nil}
@@ -814,7 +814,7 @@ func (s *testDDLSuite) TestCancelJob(c *C) {
 	updateTest(&tests[28])
 	idxOrigName = "primary"
 	validArgs = []interface{}{false, model.NewCIStr(idxOrigName),
-		[]*ast.IndexColName{{
+		[]*ast.IndexPartSpecification{{
 			Column: &ast.ColumnName{Name: model.NewCIStr("c1")},
 			Length: -1,
 		}}, nil}
diff --git a/ddl/index.go b/ddl/index.go
index 31b565e812..5a9e8aed23 100644
--- a/ddl/index.go
+++ b/ddl/index.go
@@ -53,7 +53,7 @@ const (
 	MaxCommentLength = 1024
 )
 
-func buildIndexColumns(columns []*model.ColumnInfo, idxColNames []*ast.IndexColName) ([]*model.IndexColumn, error) {
+func buildIndexColumns(columns []*model.ColumnInfo, idxColNames []*ast.IndexPartSpecification) ([]*model.IndexColumn, error) {
 	// Build offsets.
 	idxColumns := make([]*model.IndexColumn, 0, len(idxColNames))
 
@@ -90,7 +90,7 @@ func buildIndexColumns(columns []*model.ColumnInfo, idxColNames []*ast.IndexColN
 	return idxColumns, nil
 }
 
-func checkPKOnGeneratedColumn(tblInfo *model.TableInfo, idxColNames []*ast.IndexColName) (*model.ColumnInfo, error) {
+func checkPKOnGeneratedColumn(tblInfo *model.TableInfo, idxColNames []*ast.IndexPartSpecification) (*model.ColumnInfo, error) {
 	var lastCol *model.ColumnInfo
 	for _, colName := range idxColNames {
 		lastCol = getColumnInfoByName(tblInfo, colName.Column.Name.L)
@@ -128,7 +128,7 @@ func checkIndexPrefixLength(columns []*model.ColumnInfo, idxColumns []*model.Ind
 	return nil
 }
 
-func checkIndexColumn(col *model.ColumnInfo, ic *ast.IndexColName) error {
+func checkIndexColumn(col *model.ColumnInfo, ic *ast.IndexPartSpecification) error {
 	if col.Flen == 0 && (types.IsTypeChar(col.FieldType.Tp) || types.IsTypeVarchar(col.FieldType.Tp)) {
 		return errors.Trace(errWrongKeyColumn.GenWithStackByArgs(ic.Column.Name))
 	}
@@ -203,7 +203,7 @@ func calcBytesLengthForDecimal(m int) int {
 	return (m / 9 * 4) + ((m%9)+1)/2
 }
 
-func buildIndexInfo(tblInfo *model.TableInfo, indexName model.CIStr, idxColNames []*ast.IndexColName, state model.SchemaState) (*model.IndexInfo, error) {
+func buildIndexInfo(tblInfo *model.TableInfo, indexName model.CIStr, idxColNames []*ast.IndexPartSpecification, state model.SchemaState) (*model.IndexInfo, error) {
 	if err := checkTooLongIndex(indexName); err != nil {
 		return nil, errors.Trace(err)
 	}
@@ -356,7 +356,7 @@ func (w *worker) onCreateIndex(d *ddlCtx, t *meta.Meta, job *model.Job, isPK boo
 	var (
 		unique      bool
 		indexName   model.CIStr
-		idxColNames []*ast.IndexColName
+		idxColNames []*ast.IndexPartSpecification
 		indexOption *ast.IndexOption
 		sqlMode     mysql.SQLMode
 		warnings    []string
diff --git a/ddl/partition.go b/ddl/partition.go
index 75241571f6..8249281836 100644
--- a/ddl/partition.go
+++ b/ddl/partition.go
@@ -687,7 +687,7 @@ func checkRangePartitioningKeysConstraints(sctx sessionctx.Context, s *ast.Creat
 	return nil
 }
 
-func checkPartitionKeysConstraint(pi *model.PartitionInfo, idxColNames []*ast.IndexColName, tblInfo *model.TableInfo, isPK bool) error {
+func checkPartitionKeysConstraint(pi *model.PartitionInfo, idxColNames []*ast.IndexPartSpecification, tblInfo *model.TableInfo, isPK bool) error {
 	var (
 		partCols []*model.ColumnInfo
 		err      error
@@ -772,7 +772,7 @@ type stringSlice interface {
 }
 
 // checkUniqueKeyIncludePartKey checks that the partitioning key is included in the constraint.
-func checkUniqueKeyIncludePartKey(partCols stringSlice, idxCols []*ast.IndexColName) bool {
+func checkUniqueKeyIncludePartKey(partCols stringSlice, idxCols []*ast.IndexPartSpecification) bool {
 	for i := 0; i < partCols.Len(); i++ {
 		partCol := partCols.At(i)
 		if !findColumnInIndexCols(partCol, idxCols) {
diff --git a/ddl/rollingback.go b/ddl/rollingback.go
index 360743249b..3969805e4e 100644
--- a/ddl/rollingback.go
+++ b/ddl/rollingback.go
@@ -84,7 +84,7 @@ func convertNotStartAddIdxJob2RollbackJob(t *meta.Meta, job *model.Job, occuredE
 	var (
 		unique      bool
 		indexName   model.CIStr
-		idxColNames []*ast.IndexColName
+		idxColNames []*ast.IndexPartSpecification
 		indexOption *ast.IndexOption
 	)
 	err = job.DecodeArgs(&unique, &indexName, &idxColNames, &indexOption)
diff --git a/executor/ddl.go b/executor/ddl.go
index f897c060d9..2eef095dbb 100644
--- a/executor/ddl.go
+++ b/executor/ddl.go
@@ -195,7 +195,7 @@ func (e *DDLExec) executeCreateView(s *ast.CreateViewStmt) error {
 func (e *DDLExec) executeCreateIndex(s *ast.CreateIndexStmt) error {
 	ident := ast.Ident{Schema: s.Table.Schema, Name: s.Table.Name}
 	err := domain.GetDomain(e.ctx).DDL().CreateIndex(e.ctx, ident, s.KeyType, model.NewCIStr(s.IndexName),
-		s.IndexColNames, s.IndexOption, s.IfNotExists)
+		s.IndexPartSpecifications, s.IndexOption, s.IfNotExists)
 	return err
 }
 
diff --git a/go.mod b/go.mod
index 1f690691ae..a3fe566444 100644
--- a/go.mod
+++ b/go.mod
@@ -24,6 +24,7 @@ require (
 	github.com/grpc-ecosystem/go-grpc-middleware v1.0.1-0.20190118093823-f849b5445de4
 	github.com/jeremywohl/flatten v0.0.0-20190921043622-d936035e55cf
 	github.com/klauspost/cpuid v0.0.0-20170728055534-ae7887de9fa5
+	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/montanaflynn/stats v0.0.0-20180911141734-db72e6cae808 // indirect
 	github.com/ngaut/pools v0.0.0-20180318154953-b7bc8c42aac7
 	github.com/ngaut/sync2 v0.0.0-20141008032647-7a24ed77b2ef
@@ -36,7 +37,7 @@ require (
 	github.com/pingcap/goleveldb v0.0.0-20171020122428-b9ff6c35079e
 	github.com/pingcap/kvproto v0.0.0-20191202044712-32be31591b03
 	github.com/pingcap/log v0.0.0-20191012051959-b742a5d432e9
-	github.com/pingcap/parser v0.0.0-20191205103532-f9aa02863ec0
+	github.com/pingcap/parser v0.0.0-20191210055545-753e13bfdbf0
 	github.com/pingcap/pd v1.1.0-beta.0.20190923032047-5c648dc365e0
 	github.com/pingcap/sysutil v0.0.0-20191126040022-986c5b3ed9a3
 	github.com/pingcap/tidb-tools v3.0.6-0.20191106033616-90632dda3863+incompatible
@@ -60,9 +61,9 @@ require (
 	go.uber.org/atomic v1.5.0
 	go.uber.org/automaxprocs v1.2.0
 	go.uber.org/zap v1.12.0
-	golang.org/x/crypto v0.0.0-20191122220453-ac88ee75c92c // indirect
+	golang.org/x/crypto v0.0.0-20191206172530-e9b2fee46413 // indirect
 	golang.org/x/net v0.0.0-20190909003024-a7b16738d86b
-	golang.org/x/sys v0.0.0-20190909082730-f460065e899a
+	golang.org/x/sys v0.0.0-20191210023423-ac6580df4449
 	golang.org/x/text v0.3.2
 	golang.org/x/time v0.0.0-20190308202827-9d24e82272b4 // indirect
 	golang.org/x/tools v0.0.0-20191107010934-f79515f33823
diff --git a/go.sum b/go.sum
index b4bb8c9d93..82abb15b88 100644
--- a/go.sum
+++ b/go.sum
@@ -128,8 +128,9 @@ github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvW
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/klauspost/cpuid v0.0.0-20170728055534-ae7887de9fa5 h1:2U0HzY8BJ8hVwDKIzp7y4voR9CX/nvcfymLmg2UiOio=
 github.com/klauspost/cpuid v0.0.0-20170728055534-ae7887de9fa5/go.mod h1:Pj4uuM528wm8OyEC2QMXAi2YiTZ96dNQPGgoMS4s3ek=
-github.com/konsorten/go-windows-terminal-sequences v1.0.1 h1:mweAR1A6xJ3oS2pRaGiHgQ4OO8tzTaLawm8vnODuwDk=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/konsorten/go-windows-terminal-sequences v1.0.2 h1:DB17ag19krx9CFsz4o3enTrPXyIXCl+2iCXH/aMAp9s=
+github.com/konsorten/go-windows-terminal-sequences v1.0.2/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
@@ -187,8 +188,10 @@ github.com/pingcap/kvproto v0.0.0-20191202044712-32be31591b03/go.mod h1:WWLmULLO
 github.com/pingcap/log v0.0.0-20190715063458-479153f07ebd/go.mod h1:WpHUKhNZ18v116SvGrmjkA9CBhYmuUTKL+p8JC9ANEw=
 github.com/pingcap/log v0.0.0-20191012051959-b742a5d432e9 h1:AJD9pZYm72vMgPcQDww9rkZ1DnWfl0pXV3BOWlkYIjA=
 github.com/pingcap/log v0.0.0-20191012051959-b742a5d432e9/go.mod h1:4rbK1p9ILyIfb6hU7OG2CiWSqMXnp3JMbiaVJ6mvoY8=
-github.com/pingcap/parser v0.0.0-20191205103532-f9aa02863ec0 h1:gIBYyKaqynsMUZeo/HxW8OG0V4Kl8UsgKEr/QlnjykQ=
-github.com/pingcap/parser v0.0.0-20191205103532-f9aa02863ec0/go.mod h1:1FNvfp9+J0wvc4kl8eGNh7Rqrxveg15jJoWo/a0uHwA=
+github.com/pingcap/parser v0.0.0-20191209191717-b26f24ac026c h1:YS+2VBeqf5w+MTjdhnmOd937fd5P6zs/zwzKVOT3Xnk=
+github.com/pingcap/parser v0.0.0-20191209191717-b26f24ac026c/go.mod h1:1FNvfp9+J0wvc4kl8eGNh7Rqrxveg15jJoWo/a0uHwA=
+github.com/pingcap/parser v0.0.0-20191210055545-753e13bfdbf0 h1:BmayUSQpOj05pzVprTZ9HCoarUlap4gYNjlHijNxx8w=
+github.com/pingcap/parser v0.0.0-20191210055545-753e13bfdbf0/go.mod h1:1FNvfp9+J0wvc4kl8eGNh7Rqrxveg15jJoWo/a0uHwA=
 github.com/pingcap/pd v1.1.0-beta.0.20190923032047-5c648dc365e0 h1:GIEq+wZfrl2bcJxpuSrEH4H7/nlf5YdmpS+dU9lNIt8=
 github.com/pingcap/pd v1.1.0-beta.0.20190923032047-5c648dc365e0/go.mod h1:G/6rJpnYwM0LKMec2rI82/5Kg6GaZMvlfB+e6/tvYmI=
 github.com/pingcap/sysutil v0.0.0-20191126040022-986c5b3ed9a3 h1:HCNif3lukL83gNC2EBAoh2Qbz36+2p0bm0LjgnNfl1s=
@@ -237,7 +240,6 @@ github.com/shurcooL/httpfs v0.0.0-20171119174359-809beceb2371/go.mod h1:ZY1cvUeJ
 github.com/shurcooL/vfsgen v0.0.0-20181020040650-a97a25d856ca h1:3fECS8atRjByijiI8yYiuwLwQ2ZxXobW7ua/8GRB3pI=
 github.com/shurcooL/vfsgen v0.0.0-20181020040650-a97a25d856ca/go.mod h1:TrYk7fJVaAttu97ZZKrO9UbRa8izdowaMIZcxYMbVaw=
 github.com/sirupsen/logrus v1.0.5/go.mod h1:pMByvHTf9Beacp5x1UXfOR9xyW/9antXMhjMPG0dEzc=
-github.com/sirupsen/logrus v1.2.0 h1:juTguoYk5qI21pwyTXY3B3Y5cOTH3ZUyZCg1v/mihuo=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
 github.com/soheilhy/cmux v0.1.4 h1:0HKaf1o97UwFjHH9o5XsHUOF+tqmdA7KEzXLpiyaw0E=
 github.com/soheilhy/cmux v0.1.4/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4kGIyLM=
@@ -305,8 +307,9 @@ golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnf
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190909091759-094676da4a83/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20191122220453-ac88ee75c92c h1:/nJuwDLoL/zrqY6gf57vxC+Pi+pZ8bfhpPkicO5H7W4=
 golang.org/x/crypto v0.0.0-20191122220453-ac88ee75c92c/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20191206172530-e9b2fee46413 h1:ULYEB3JvPRE/IfO+9uO7vKV/xzVTO7XPAwm8xbf4w2g=
+golang.org/x/crypto v0.0.0-20191206172530-e9b2fee46413/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
@@ -339,9 +342,11 @@ golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190826190057-c7b8b68b1456/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190909082730-f460065e899a h1:mIzbOulag9/gXacgxKlFVwpCOWSfBT3/pDyyCwGA9as=
 golang.org/x/sys v0.0.0-20190909082730-f460065e899a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191210023423-ac6580df4449 h1:gSbV7h1NRL2G1xTg/owz62CST1oJBmxy4QpMMregXVQ=
+golang.org/x/sys v0.0.0-20191210023423-ac6580df4449/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
diff --git a/planner/core/preprocess.go b/planner/core/preprocess.go
index 8c2b192c17..111c10d378 100644
--- a/planner/core/preprocess.go
+++ b/planner/core/preprocess.go
@@ -500,7 +500,7 @@ func (p *preprocessor) checkCreateIndexGrammar(stmt *ast.CreateIndexStmt) {
 		p.err = ddl.ErrWrongTableName.GenWithStackByArgs(tName)
 		return
 	}
-	p.err = checkIndexInfo(stmt.IndexName, stmt.IndexColNames)
+	p.err = checkIndexInfo(stmt.IndexName, stmt.IndexPartSpecifications)
 }
 
 func (p *preprocessor) checkRenameTableGrammar(stmt *ast.RenameTableStmt) {
@@ -578,10 +578,10 @@ func (p *preprocessor) checkAlterTableGrammar(stmt *ast.AlterTableStmt) {
 }
 
 // checkDuplicateColumnName checks if index exists duplicated columns.
-func checkDuplicateColumnName(indexColNames []*ast.IndexColName) error {
-	colNames := make(map[string]struct{}, len(indexColNames))
-	for _, indexColName := range indexColNames {
-		name := indexColName.Column.Name
+func checkDuplicateColumnName(IndexPartSpecifications []*ast.IndexPartSpecification) error {
+	colNames := make(map[string]struct{}, len(IndexPartSpecifications))
+	for _, IndexColNameWithExpr := range IndexPartSpecifications {
+		name := IndexColNameWithExpr.Column.Name
 		if _, ok := colNames[name.L]; ok {
 			return infoschema.ErrColumnExists.GenWithStackByArgs(name)
 		}
@@ -591,14 +591,14 @@ func checkDuplicateColumnName(indexColNames []*ast.IndexColName) error {
 }
 
 // checkIndexInfo checks index name and index column names.
-func checkIndexInfo(indexName string, indexColNames []*ast.IndexColName) error {
+func checkIndexInfo(indexName string, IndexPartSpecifications []*ast.IndexPartSpecification) error {
 	if strings.EqualFold(indexName, mysql.PrimaryKeyName) {
 		return ddl.ErrWrongNameForIndex.GenWithStackByArgs(indexName)
 	}
-	if len(indexColNames) > mysql.MaxKeyParts {
+	if len(IndexPartSpecifications) > mysql.MaxKeyParts {
 		return infoschema.ErrTooManyKeyParts.GenWithStackByArgs(mysql.MaxKeyParts)
 	}
-	return checkDuplicateColumnName(indexColNames)
+	return checkDuplicateColumnName(IndexPartSpecifications)
 }
 
 // checkColumn checks if the column definition is valid.