diff --git a/engine.go b/engine.go
index 51d750aa..cdb2b541 100644
--- a/engine.go
+++ b/engine.go
@@ -1116,19 +1116,22 @@ func (engine *Engine) Sync2(beans ...interface{}) error {
 				}
 
 				if oriCol != nil {
-					if col.SQLType.Name != oriCol.SQLType.Name {
-						if col.SQLType.Name == core.Text &&
-							oriCol.SQLType.Name == core.Varchar {
+					expectedType := engine.dialect.SqlType(col)
+					//curType := oriCol.SQLType.Name
+					curType := engine.dialect.SqlType(oriCol)
+					if expectedType != curType {
+						if expectedType == core.Text &&
+							curType == core.Varchar {
 							// currently only support mysql
 							if engine.dialect.DBType() == core.MYSQL {
 								_, err = engine.Exec(engine.dialect.ModifyColumnSql(table.Name, col))
 							} else {
 								engine.LogWarnf("Table %s Column %s db type is %s, struct type is %s\n",
-									table.Name, col.Name, oriCol.SQLType.Name, col.SQLType.Name)
+									table.Name, col.Name, curType, expectedType)
 							}
 						} else {
 							engine.LogWarnf("Table %s Column %s db type is %s, struct type is %s",
-								table.Name, col.Name, oriCol.SQLType.Name, col.SQLType.Name)
+								table.Name, col.Name, curType, expectedType)
 						}
 					}
 					if col.Default != oriCol.Default {
diff --git a/mysql_dialect.go b/mysql_dialect.go
index 479e6347..b7fdb01b 100644
--- a/mysql_dialect.go
+++ b/mysql_dialect.go
@@ -60,7 +60,7 @@ func (db *mysql) SqlType(c *core.Column) string {
 		for v, _ := range c.EnumOptions {
 			opts += fmt.Sprintf(",'%v'", v)
 		}
-		res += strings.TrimLeft(opts,",")
+		res += strings.TrimLeft(opts, ",")
 		res += ")"
 	case core.Set: //mysql set
 		res = core.Set
@@ -69,7 +69,7 @@ func (db *mysql) SqlType(c *core.Column) string {
 		for v, _ := range c.SetOptions {
 			opts += fmt.Sprintf(",'%v'", v)
 		}
-		res += strings.TrimLeft(opts,",")
+		res += strings.TrimLeft(opts, ",")
 		res += ")"
 	default:
 		res = t
@@ -78,6 +78,11 @@ func (db *mysql) SqlType(c *core.Column) string {
 	var hasLen1 bool = (c.Length > 0)
 	var hasLen2 bool = (c.Length2 > 0)
 
+	if res == core.BigInt && !hasLen1 && !hasLen2 {
+		c.Length = 20
+		hasLen1 = true
+	}
+
 	if hasLen2 {
 		res += "(" + strconv.Itoa(c.Length) + "," + strconv.Itoa(c.Length2) + ")"
 	} else if hasLen1 {
diff --git a/postgres_dialect.go b/postgres_dialect.go
index 61d4f1e2..eec9989b 100644
--- a/postgres_dialect.go
+++ b/postgres_dialect.go
@@ -177,7 +177,8 @@ WHERE c.relkind = 'r'::char AND c.relname = $1 AND f.attnum > 0 ORDER BY f.attnu
 		if err != nil {
 			return nil, nil, err
 		}
-		//fmt.Println(args,colName, isNullable, dataType,maxLenStr, colDefault, numPrecision, numRadix,isPK ,isUnique)
+
+		//fmt.Println(args, colName, isNullable, dataType, maxLenStr, colDefault, numPrecision, numRadix, isPK, isUnique)
 		var maxLen int
 		if maxLenStr != nil {
 			maxLen, err = strconv.Atoi(*maxLenStr)
@@ -220,7 +221,7 @@ WHERE c.relkind = 'r'::char AND c.relname = $1 AND f.attnum > 0 ORDER BY f.attnu
 
 		col.Length = maxLen
 
-		if col.SQLType.IsText() {
+		if col.SQLType.IsText() || col.SQLType.IsTime() {
 			if col.Default != "" {
 				col.Default = "'" + col.Default + "'"
 			} else {
diff --git a/session.go b/session.go
index 009a758a..5d127c74 100644
--- a/session.go
+++ b/session.go
@@ -996,9 +996,8 @@ func (session *Session) Get(bean interface{}) (bool, error) {
 			err = session.row2Bean(rawRows, fields, len(fields), bean)
 		}
 		return true, err
-	} else {
-		return false, nil
 	}
+	return false, nil
 }
 
 // Count counts the records. bean's non-empty fields