diff --git a/driver/mysql/def.go b/driver/mysql/def.go
index f116b2c..d888cca 100644
--- a/driver/mysql/def.go
+++ b/driver/mysql/def.go
@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	"github.com/things-go/ens"
+	"github.com/things-go/ens/schema"
 	"github.com/things-go/ens/utils"
 )
 
@@ -49,16 +50,46 @@ type Column struct {
 	ColumnDefault          *string `gorm:"column:COLUMN_DEFAULT"`   // column default value.null mean not set.
 	IsNullable             string  `gorm:"column:IS_NULLABLE"`      // column null or not, YEW/NO
 	DataType               string  `gorm:"column:DATA_TYPE"`        // column data type(varchar)
-	CharacterMaximumLength int64   `gorm:"column:CHARACTER_MAXIMUM_LENGTH"`
-	CharacterOctetLength   int64   `gorm:"column:CHARACTER_OCTET_LENGTH"`
-	NumericPrecision       int64   `gorm:"column:NUMERIC_PRECISION"`
-	NumericScale           int64   `gorm:"column:NUMERIC_SCALE"`
+	CharacterMaximumLength *int64  `gorm:"column:CHARACTER_MAXIMUM_LENGTH"`
+	CharacterOctetLength   *int64  `gorm:"column:CHARACTER_OCTET_LENGTH"`
+	NumericPrecision       *int64  `gorm:"column:NUMERIC_PRECISION"`
+	NumericScale           *int64  `gorm:"column:NUMERIC_SCALE"`
 	ColumnType             string  `gorm:"column:COLUMN_TYPE"`    // column type(varchar(64))
 	ColumnKey              string  `gorm:"column:COLUMN_KEY"`     // column key, PRI/MUL
 	Extra                  string  `gorm:"column:EXTRA"`          // extra (auto_increment)
 	ColumnComment          string  `gorm:"column:COLUMN_COMMENT"` // column comment
 }
 
+func (c *Column) IntoSchemaColumn(indexes []*schema.ColumnIndex) *schema.Column {
+	col := &schema.Column{
+		Name:              c.ColumnName,
+		DataType:          c.DataType,
+		ColumnType:        c.ColumnType,
+		Unique:            c.ColumnKey == columnKeyUnique,
+		Nullable:          strings.EqualFold(c.IsNullable, nullableTrue),
+		Default:           c.ColumnDefault,
+		IsPrimaryKey:      c.ColumnKey == columnKeyPrimary,
+		AutoIncrement:     c.Extra == extraAutoIncrement,
+		HasLength:         false,
+		Length:            0,
+		HasPrecisionScale: false,
+		Precision:         0,
+		Scale:             0,
+		Comment:           c.ColumnComment,
+		Indexes:           indexes,
+	}
+	if c.CharacterMaximumLength != nil {
+		col.HasLength = true
+		col.Length = *c.CharacterMaximumLength
+	}
+	if c.NumericPrecision != nil && c.NumericScale != nil {
+		col.HasPrecisionScale = true
+		col.Precision = *c.NumericPrecision
+		col.Scale = *c.NumericScale
+	}
+	return col
+}
+
 func (c *Column) IntoSqlDefinition() string {
 	nullable := strings.EqualFold(c.IsNullable, nullableTrue)
 	isAutoIncrement := c.Extra == extraAutoIncrement
diff --git a/driver/mysql/sql.go b/driver/mysql/sql.go
index 9972b0f..c14c6c8 100644
--- a/driver/mysql/sql.go
+++ b/driver/mysql/sql.go
@@ -227,10 +227,10 @@ func fromSqlColumnDefinition(ordinalPosition int, col *sqlparser.ColumnDefinitio
 		ColumnDefault:          nil,
 		IsNullable:             "",
 		DataType:               colType.Type,
-		CharacterMaximumLength: 0,
-		CharacterOctetLength:   0,
-		NumericPrecision:       0,
-		NumericScale:           0,
+		CharacterMaximumLength: nil,
+		CharacterOctetLength:   nil,
+		NumericPrecision:       nil,
+		NumericScale:           nil,
 		ColumnType:             "",
 		ColumnKey:              "",
 		Extra:                  "",
@@ -262,6 +262,16 @@ func fromSqlColumnDefinition(ordinalPosition int, col *sqlparser.ColumnDefinitio
 		}
 		return length
 	}
+	if colType.Length != nil {
+		v := toInt(colType.Length)
+		column.CharacterMaximumLength = &v
+	}
+	if colType.Scale != nil {
+		v := toInt(colType.Length)
+		sv := toInt(colType.Scale)
+		column.NumericPrecision = &v
+		column.NumericScale = &sv
+	}
 
 	isUnsigned := bool(colType.Unsigned)
 	switch colType.Type {
diff --git a/schema/column.go b/schema/column.go
index 5a691c9..6ae3b2c 100644
--- a/schema/column.go
+++ b/schema/column.go
@@ -7,6 +7,15 @@ import (
 	"github.com/things-go/ens/utils"
 )
 
+type ColumnIndex struct {
+	KeyName     string
+	PrimaryKey  bool
+	Unique      bool
+	IsComposite bool
+	Priority    int
+	IndexType   string
+}
+
 type Column struct {
 	Name              string
 	DataType          string // varchar
@@ -22,7 +31,7 @@ type Column struct {
 	Precision         int64
 	Scale             int64
 	Comment           string
-	Indexes           []*Index
+	Indexes           []*ColumnIndex
 }
 
 // column, type, not null, authIncrement, default, [primaryKey|index], comment