Synchronization code

Src/Asp.Net/SqlSugar/Realization/MySql/DbMaintenance/MySqlDbMaintenance.cs

@@ -586,10 +586,8 @@ namespace SqlSugar
             }
             if (defaultValue.ToLower().IsIn("now()", "current_timestamp","null") || defaultValue.ToLower().Contains("current_timestamp")|| defaultValue.Contains("()"))
             {
-                string template = "ALTER table {0} CHANGE COLUMN {1} {1} {3} {4} default {2} COMMENT '{5}'";
-                var dbColumnInfo = this.Context.DbMaintenance.GetColumnInfosByTableName(tableName,false).First(it => it.DbColumnName.Equals(columnName, StringComparison.CurrentCultureIgnoreCase));
-                var value = Regex.Match(defaultValue, @"\(\d\)$").Value;
-                string sql = string.Format(template, tableName, columnName, defaultValue, dbColumnInfo.DataType + value, dbColumnInfo.IsNullable ? " NULL " : " NOT NULL ", dbColumnInfo.ColumnDescription);
+                defaultValue = "(" + defaultValue + ")";
+                string sql = string.Format(AddDefaultValueSql.Replace("'", ""), tableName, columnName, defaultValue);
                 this.Context.Ado.ExecuteCommand(sql);
                 return true;
             }