add Find ints support & split session into multiple files

session_delete.go

@@ -0,0 +1,234 @@
+package xorm
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+
+	"github.com/xormplus/core"
+)
+
+func (session *Session) cacheDelete(sqlStr string, args ...interface{}) error {
+	if session.Statement.RefTable == nil ||
+		session.Tx != nil {
+		return ErrCacheFailed
+	}
+
+	for _, filter := range session.Engine.dialect.Filters() {
+		sqlStr = filter.Do(sqlStr, session.Engine.dialect, session.Statement.RefTable)
+	}
+
+	newsql := session.Statement.convertIDSQL(sqlStr)
+	if newsql == "" {
+		return ErrCacheFailed
+	}
+
+	cacher := session.Engine.getCacher2(session.Statement.RefTable)
+	tableName := session.Statement.TableName()
+	ids, err := core.GetCacheSql(cacher, tableName, newsql, args)
+	if err != nil {
+		resultsSlice, err := session.query(newsql, args...)
+		if err != nil {
+			return err
+		}
+		ids = make([]core.PK, 0)
+		if len(resultsSlice) > 0 {
+			for _, data := range resultsSlice {
+				var id int64
+				var pk core.PK = make([]interface{}, 0)
+				for _, col := range session.Statement.RefTable.PKColumns() {
+					if v, ok := data[col.Name]; !ok {
+						return errors.New("no id")
+					} else if col.SQLType.IsText() {
+						pk = append(pk, string(v))
+					} else if col.SQLType.IsNumeric() {
+						id, err = strconv.ParseInt(string(v), 10, 64)
+						if err != nil {
+							return err
+						}
+						pk = append(pk, id)
+					} else {
+						return errors.New("not supported primary key type")
+					}
+				}
+				ids = append(ids, pk)
+			}
+		}
+	} /*else {
+	    session.Engine.LogDebug("delete cache sql %v", newsql)
+	    cacher.DelIds(tableName, genSqlKey(newsql, args))
+	}*/
+
+	for _, id := range ids {
+		session.Engine.logger.Debug("[cacheDelete] delete cache obj", tableName, id)
+		sid, err := id.ToString()
+		if err != nil {
+			return err
+		}
+		cacher.DelBean(tableName, sid)
+	}
+	session.Engine.logger.Debug("[cacheDelete] clear cache sql", tableName)
+	cacher.ClearIds(tableName)
+	return nil
+}
+
+// Delete records, bean's non-empty fields are conditions
+func (session *Session) Delete(bean interface{}) (int64, error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	session.Statement.setRefValue(rValue(bean))
+	var table = session.Statement.RefTable
+
+	// handle before delete processors
+	for _, closure := range session.beforeClosures {
+		closure(bean)
+	}
+	cleanupProcessorsClosures(&session.beforeClosures)
+
+	if processor, ok := interface{}(bean).(BeforeDeleteProcessor); ok {
+		processor.BeforeDelete()
+	}
+
+	// --
+	condSQL, condArgs, _ := session.Statement.genConds(bean)
+	if len(condSQL) == 0 && session.Statement.LimitN == 0 {
+		return 0, ErrNeedDeletedCond
+	}
+
+	var tableName = session.Engine.Quote(session.Statement.TableName())
+	var deleteSQL string
+	if len(condSQL) > 0 {
+		deleteSQL = fmt.Sprintf("DELETE FROM %v WHERE %v", tableName, condSQL)
+	} else {
+		deleteSQL = fmt.Sprintf("DELETE FROM %v", tableName)
+	}
+
+	var orderSQL string
+	if len(session.Statement.OrderStr) > 0 {
+		orderSQL += fmt.Sprintf(" ORDER BY %s", session.Statement.OrderStr)
+	}
+	if session.Statement.LimitN > 0 {
+		orderSQL += fmt.Sprintf(" LIMIT %d", session.Statement.LimitN)
+	}
+
+	if len(orderSQL) > 0 {
+		switch session.Engine.dialect.DBType() {
+		case core.POSTGRES:
+			inSQL := fmt.Sprintf("ctid IN (SELECT ctid FROM %s%s)", tableName, orderSQL)
+			if len(condSQL) > 0 {
+				deleteSQL += " AND " + inSQL
+			} else {
+				deleteSQL += " WHERE " + inSQL
+			}
+		case core.SQLITE:
+			inSQL := fmt.Sprintf("rowid IN (SELECT rowid FROM %s%s)", tableName, orderSQL)
+			if len(condSQL) > 0 {
+				deleteSQL += " AND " + inSQL
+			} else {
+				deleteSQL += " WHERE " + inSQL
+			}
+		// TODO: how to handle delete limit on mssql?
+		case core.MSSQL:
+			return 0, ErrNotImplemented
+		default:
+			deleteSQL += orderSQL
+		}
+	}
+
+	var realSQL string
+	argsForCache := make([]interface{}, 0, len(condArgs)*2)
+	if session.Statement.unscoped || table.DeletedColumn() == nil { // tag "deleted" is disabled
+		realSQL = deleteSQL
+		copy(argsForCache, condArgs)
+		argsForCache = append(condArgs, argsForCache...)
+	} else {
+		// !oinume! sqlStrForCache and argsForCache is needed to behave as executing "DELETE FROM ..." for cache.
+		copy(argsForCache, condArgs)
+		argsForCache = append(condArgs, argsForCache...)
+
+		deletedColumn := table.DeletedColumn()
+		realSQL = fmt.Sprintf("UPDATE %v SET %v = ? WHERE %v",
+			session.Engine.Quote(session.Statement.TableName()),
+			session.Engine.Quote(deletedColumn.Name),
+			condSQL)
+
+		if len(orderSQL) > 0 {
+			switch session.Engine.dialect.DBType() {
+			case core.POSTGRES:
+				inSQL := fmt.Sprintf("ctid IN (SELECT ctid FROM %s%s)", tableName, orderSQL)
+				if len(condSQL) > 0 {
+					realSQL += " AND " + inSQL
+				} else {
+					realSQL += " WHERE " + inSQL
+				}
+			case core.SQLITE:
+				inSQL := fmt.Sprintf("rowid IN (SELECT rowid FROM %s%s)", tableName, orderSQL)
+				if len(condSQL) > 0 {
+					realSQL += " AND " + inSQL
+				} else {
+					realSQL += " WHERE " + inSQL
+				}
+			// TODO: how to handle delete limit on mssql?
+			case core.MSSQL:
+				return 0, ErrNotImplemented
+			default:
+				realSQL += orderSQL
+			}
+		}
+
+		// !oinume! Insert NowTime to the head of session.Statement.Params
+		condArgs = append(condArgs, "")
+		paramsLen := len(condArgs)
+		copy(condArgs[1:paramsLen], condArgs[0:paramsLen-1])
+
+		val, t := session.Engine.NowTime2(deletedColumn.SQLType.Name)
+		condArgs[0] = val
+
+		var colName = deletedColumn.Name
+		session.afterClosures = append(session.afterClosures, func(bean interface{}) {
+			col := table.GetColumn(colName)
+			setColumnTime(bean, col, t)
+		})
+	}
+
+	if cacher := session.Engine.getCacher2(session.Statement.RefTable); cacher != nil && session.Statement.UseCache {
+		session.cacheDelete(deleteSQL, argsForCache...)
+	}
+
+	res, err := session.exec(realSQL, condArgs...)
+	if err != nil {
+		return 0, err
+	}
+
+	// handle after delete processors
+	if session.IsAutoCommit {
+		for _, closure := range session.afterClosures {
+			closure(bean)
+		}
+		if processor, ok := interface{}(bean).(AfterDeleteProcessor); ok {
+			processor.AfterDelete()
+		}
+	} else {
+		lenAfterClosures := len(session.afterClosures)
+		if lenAfterClosures > 0 {
+			if value, has := session.afterDeleteBeans[bean]; has && value != nil {
+				*value = append(*value, session.afterClosures...)
+			} else {
+				afterClosures := make([]func(interface{}), lenAfterClosures)
+				copy(afterClosures, session.afterClosures)
+				session.afterDeleteBeans[bean] = &afterClosures
+			}
+		} else {
+			if _, ok := interface{}(bean).(AfterInsertProcessor); ok {
+				session.afterDeleteBeans[bean] = nil
+			}
+		}
+	}
+	cleanupProcessorsClosures(&session.afterClosures)
+	// --
+
+	return res.RowsAffected()
+}

session_find.go

@@ -0,0 +1,475 @@
+package xorm
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+	"strconv"
+	"strings"
+
+	"github.com/go-xorm/builder"
+	"github.com/xormplus/core"
+)
+
+const (
+	tpStruct = iota
+	tpNonStruct
+)
+
+// Find retrieve records from table, condiBeans's non-empty fields
+// are conditions. beans could be []Struct, []*Struct, map[int64]Struct
+// map[int64]*Struct
+func (session *Session) Find(rowsSlicePtr interface{}, condiBean ...interface{}) error {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	sliceValue := reflect.Indirect(reflect.ValueOf(rowsSlicePtr))
+	if sliceValue.Kind() != reflect.Slice && sliceValue.Kind() != reflect.Map {
+		return errors.New("needs a pointer to a slice or a map")
+	}
+
+	sliceElementType := sliceValue.Type().Elem()
+
+	var tp = tpStruct
+	if session.Statement.RefTable == nil {
+		if sliceElementType.Kind() == reflect.Ptr {
+			if sliceElementType.Elem().Kind() == reflect.Struct {
+				pv := reflect.New(sliceElementType.Elem())
+				session.Statement.setRefValue(pv.Elem())
+			} else {
+				//return errors.New("slice type")
+				tp = tpNonStruct
+			}
+		} else if sliceElementType.Kind() == reflect.Struct {
+			pv := reflect.New(sliceElementType)
+			session.Statement.setRefValue(pv.Elem())
+		} else {
+			//return errors.New("slice type")
+			tp = tpNonStruct
+		}
+	}
+
+	var table = session.Statement.RefTable
+
+	var addedTableName = (len(session.Statement.JoinStr) > 0)
+	var autoCond builder.Cond
+	if tp == tpStruct {
+		if !session.Statement.noAutoCondition && len(condiBean) > 0 {
+			var err error
+			autoCond, err = session.Statement.buildConds(table, condiBean[0], true, true, false, true, addedTableName)
+			if err != nil {
+				panic(err)
+			}
+		} else {
+			// !oinume! Add "<col> IS NULL" to WHERE whatever condiBean is given.
+			// See https://github.com/go-xorm/xorm/issues/179
+			if col := table.DeletedColumn(); col != nil && !session.Statement.unscoped { // tag "deleted" is enabled
+				var colName = session.Engine.Quote(col.Name)
+				if addedTableName {
+					var nm = session.Statement.TableName()
+					if len(session.Statement.TableAlias) > 0 {
+						nm = session.Statement.TableAlias
+					}
+					colName = session.Engine.Quote(nm) + "." + colName
+				}
+				if session.Engine.dialect.DBType() == core.MSSQL {
+					autoCond = builder.IsNull{colName}
+				} else {
+					autoCond = builder.IsNull{colName}.Or(builder.Eq{colName: "0001-01-01 00:00:00"})
+				}
+			}
+		}
+	}
+
+	var sqlStr string
+	var args []interface{}
+	if session.Statement.RawSQL == "" {
+		if len(session.Statement.TableName()) <= 0 {
+			return ErrTableNotFound
+		}
+
+		var columnStr = session.Statement.ColumnStr
+		if len(session.Statement.selectStr) > 0 {
+			columnStr = session.Statement.selectStr
+		} else {
+			if session.Statement.JoinStr == "" {
+				if columnStr == "" {
+					if session.Statement.GroupByStr != "" {
+						columnStr = session.Statement.Engine.Quote(strings.Replace(session.Statement.GroupByStr, ",", session.Engine.Quote(","), -1))
+					} else {
+						columnStr = session.Statement.genColumnStr()
+					}
+				}
+			} else {
+				if columnStr == "" {
+					if session.Statement.GroupByStr != "" {
+						columnStr = session.Statement.Engine.Quote(strings.Replace(session.Statement.GroupByStr, ",", session.Engine.Quote(","), -1))
+					} else {
+						columnStr = "*"
+					}
+				}
+			}
+			if columnStr == "" {
+				columnStr = "*"
+			}
+		}
+
+		condSQL, condArgs, _ := builder.ToSQL(session.Statement.cond.And(autoCond))
+
+		args = append(session.Statement.joinArgs, condArgs...)
+		sqlStr = session.Statement.genSelectSQL(columnStr, condSQL)
+		// for mssql and use limit
+		qs := strings.Count(sqlStr, "?")
+		if len(args)*2 == qs {
+			args = append(args, args...)
+		}
+	} else {
+		sqlStr = session.Statement.RawSQL
+		args = session.Statement.RawParams
+	}
+
+	var err error
+	if session.canCache() {
+		if cacher := session.Engine.getCacher2(table); cacher != nil &&
+			!session.Statement.IsDistinct &&
+			!session.Statement.unscoped {
+			err = session.cacheFind(sliceElementType, sqlStr, rowsSlicePtr, args...)
+			if err != ErrCacheFailed {
+				return err
+			}
+			err = nil // !nashtsai! reset err to nil for ErrCacheFailed
+			session.Engine.logger.Warn("Cache Find Failed")
+		}
+	}
+
+	if sliceValue.Kind() != reflect.Map {
+		if session.IsSqlFuc {
+			var dialect = session.Statement.Engine.Dialect()
+			rownumber := "xorm" + NewShortUUID().String()
+			sql := session.genSelectSql(dialect, rownumber)
+
+			params := session.Statement.RawParams
+			i := len(params)
+			if i == 1 {
+				vv := reflect.ValueOf(params[0])
+				if vv.Kind() != reflect.Ptr || vv.Elem().Kind() != reflect.Map {
+					sqlStr = sql
+					args = params
+				} else {
+					sqlStr, args, _ = core.MapToSlice(sqlStr, params[0])
+				}
+			} else {
+				sqlStr = sql
+				args = params
+			}
+		}
+
+		return session.noCacheFind(sliceValue, sqlStr, args...)
+	}
+
+	resultsSlice, err := session.query(sqlStr, args...)
+	if err != nil {
+		return err
+	}
+
+	keyType := sliceValue.Type().Key()
+
+	for _, results := range resultsSlice {
+		var newValue reflect.Value
+		if sliceElementType.Kind() == reflect.Ptr {
+			newValue = reflect.New(sliceElementType.Elem())
+		} else {
+			newValue = reflect.New(sliceElementType)
+		}
+		err := session.scanMapIntoStruct(newValue.Interface(), results)
+		if err != nil {
+			return err
+		}
+		var key interface{}
+		// if there is only one pk, we can put the id as map key.
+		if len(table.PrimaryKeys) == 1 {
+			key, err = str2PK(string(results[table.PrimaryKeys[0]]), keyType)
+			if err != nil {
+				return err
+			}
+		} else {
+			if keyType.Kind() != reflect.Slice {
+				panic("don't support multiple primary key's map has non-slice key type")
+			} else {
+				var keys core.PK = make([]interface{}, 0, len(table.PrimaryKeys))
+				for _, pk := range table.PrimaryKeys {
+					skey, err := str2PK(string(results[pk]), keyType)
+					if err != nil {
+						return err
+					}
+					keys = append(keys, skey)
+				}
+				key = keys
+			}
+		}
+
+		if sliceElementType.Kind() == reflect.Ptr {
+			sliceValue.SetMapIndex(reflect.ValueOf(key), reflect.ValueOf(newValue.Interface()))
+		} else {
+			sliceValue.SetMapIndex(reflect.ValueOf(key), reflect.Indirect(reflect.ValueOf(newValue.Interface())))
+		}
+	}
+
+	return nil
+}
+
+func (session *Session) noCacheFind(sliceValue reflect.Value, sqlStr string, args ...interface{}) error {
+	var rawRows *core.Rows
+	var err error
+
+	session.queryPreprocess(&sqlStr, args...)
+	if session.IsAutoCommit {
+		_, rawRows, err = session.innerQuery(sqlStr, args...)
+	} else {
+		rawRows, err = session.Tx.Query(sqlStr, args...)
+	}
+	if err != nil {
+		return err
+	}
+	defer rawRows.Close()
+
+	fields, err := rawRows.Columns()
+	if err != nil {
+		return err
+	}
+
+	var newElemFunc func() reflect.Value
+	sliceElementType := sliceValue.Type().Elem()
+	if sliceElementType.Kind() == reflect.Ptr {
+		newElemFunc = func() reflect.Value {
+			return reflect.New(sliceElementType.Elem())
+		}
+	} else {
+		newElemFunc = func() reflect.Value {
+			return reflect.New(sliceElementType)
+		}
+	}
+
+	var sliceValueSetFunc func(*reflect.Value)
+
+	if sliceValue.Kind() == reflect.Slice {
+		if sliceElementType.Kind() == reflect.Ptr {
+			sliceValueSetFunc = func(newValue *reflect.Value) {
+				sliceValue.Set(reflect.Append(sliceValue, reflect.ValueOf(newValue.Interface())))
+			}
+		} else {
+			sliceValueSetFunc = func(newValue *reflect.Value) {
+				sliceValue.Set(reflect.Append(sliceValue, reflect.Indirect(reflect.ValueOf(newValue.Interface()))))
+			}
+		}
+	}
+
+	var newValue = newElemFunc()
+	dataStruct := rValue(newValue.Interface())
+	if dataStruct.Kind() == reflect.Struct {
+		return session.rows2Beans(rawRows, fields, len(fields), session.Engine.autoMapType(dataStruct), newElemFunc, sliceValueSetFunc)
+	}
+
+	for rawRows.Next() {
+		var newValue = newElemFunc()
+		bean := newValue.Interface()
+
+		if err := rawRows.Scan(bean); err != nil {
+			return err
+		}
+
+		sliceValueSetFunc(&newValue)
+	}
+	return nil
+}
+
+func (session *Session) cacheFind(t reflect.Type, sqlStr string, rowsSlicePtr interface{}, args ...interface{}) (err error) {
+	if !session.canCache() ||
+		indexNoCase(sqlStr, "having") != -1 ||
+		indexNoCase(sqlStr, "group by") != -1 {
+		return ErrCacheFailed
+	}
+
+	for _, filter := range session.Engine.dialect.Filters() {
+		sqlStr = filter.Do(sqlStr, session.Engine.dialect, session.Statement.RefTable)
+	}
+
+	newsql := session.Statement.convertIDSQL(sqlStr)
+	if newsql == "" {
+		return ErrCacheFailed
+	}
+
+	tableName := session.Statement.TableName()
+
+	table := session.Statement.RefTable
+	cacher := session.Engine.getCacher2(table)
+	ids, err := core.GetCacheSql(cacher, tableName, newsql, args)
+	if err != nil {
+		rows, err := session.DB().Query(newsql, args...)
+		if err != nil {
+			return err
+		}
+		defer rows.Close()
+
+		var i int
+		ids = make([]core.PK, 0)
+		for rows.Next() {
+			i++
+			if i > 500 {
+				session.Engine.logger.Debug("[cacheFind] ids length > 500, no cache")
+				return ErrCacheFailed
+			}
+			var res = make([]string, len(table.PrimaryKeys))
+			err = rows.ScanSlice(&res)
+			if err != nil {
+				return err
+			}
+
+			var pk core.PK = make([]interface{}, len(table.PrimaryKeys))
+			for i, col := range table.PKColumns() {
+				if col.SQLType.IsNumeric() {
+					n, err := strconv.ParseInt(res[i], 10, 64)
+					if err != nil {
+						return err
+					}
+					pk[i] = n
+				} else if col.SQLType.IsText() {
+					pk[i] = res[i]
+				} else {
+					return errors.New("not supported")
+				}
+			}
+
+			ids = append(ids, pk)
+		}
+
+		session.Engine.logger.Debug("[cacheFind] cache sql:", ids, tableName, newsql, args)
+		err = core.PutCacheSql(cacher, ids, tableName, newsql, args)
+		if err != nil {
+			return err
+		}
+	} else {
+		session.Engine.logger.Debug("[cacheFind] cache hit sql:", newsql, args)
+	}
+
+	sliceValue := reflect.Indirect(reflect.ValueOf(rowsSlicePtr))
+
+	ididxes := make(map[string]int)
+	var ides []core.PK
+	var temps = make([]interface{}, len(ids))
+
+	for idx, id := range ids {
+		sid, err := id.ToString()
+		if err != nil {
+			return err
+		}
+		bean := cacher.GetBean(tableName, sid)
+		if bean == nil {
+			ides = append(ides, id)
+			ididxes[sid] = idx
+		} else {
+			session.Engine.logger.Debug("[cacheFind] cache hit bean:", tableName, id, bean)
+
+			pk := session.Engine.IdOf(bean)
+			xid, err := pk.ToString()
+			if err != nil {
+				return err
+			}
+
+			if sid != xid {
+				session.Engine.logger.Error("[cacheFind] error cache", xid, sid, bean)
+				return ErrCacheFailed
+			}
+			temps[idx] = bean
+		}
+	}
+
+	if len(ides) > 0 {
+		newSession := session.Engine.NewSession()
+		defer newSession.Close()
+
+		slices := reflect.New(reflect.SliceOf(t))
+		beans := slices.Interface()
+
+		if len(table.PrimaryKeys) == 1 {
+			ff := make([]interface{}, 0, len(ides))
+			for _, ie := range ides {
+				ff = append(ff, ie[0])
+			}
+
+			newSession.In("`"+table.PrimaryKeys[0]+"`", ff...)
+		} else {
+			for _, ie := range ides {
+				cond := builder.NewCond()
+				for i, name := range table.PrimaryKeys {
+					cond = cond.And(builder.Eq{"`" + name + "`": ie[i]})
+				}
+				newSession.Or(cond)
+			}
+		}
+
+		err = newSession.NoCache().Find(beans)
+		if err != nil {
+			return err
+		}
+
+		vs := reflect.Indirect(reflect.ValueOf(beans))
+		for i := 0; i < vs.Len(); i++ {
+			rv := vs.Index(i)
+			if rv.Kind() != reflect.Ptr {
+				rv = rv.Addr()
+			}
+			id := session.Engine.IdOfV(rv)
+			sid, err := id.ToString()
+			if err != nil {
+				return err
+			}
+
+			bean := rv.Interface()
+			temps[ididxes[sid]] = bean
+			session.Engine.logger.Debug("[cacheFind] cache bean:", tableName, id, bean, temps)
+			cacher.PutBean(tableName, sid, bean)
+		}
+	}
+
+	for j := 0; j < len(temps); j++ {
+		bean := temps[j]
+		if bean == nil {
+			session.Engine.logger.Warn("[cacheFind] cache no hit:", tableName, ids[j], temps)
+			// return errors.New("cache error") // !nashtsai! no need to return error, but continue instead
+			continue
+		}
+		if sliceValue.Kind() == reflect.Slice {
+			if t.Kind() == reflect.Ptr {
+				sliceValue.Set(reflect.Append(sliceValue, reflect.ValueOf(bean)))
+			} else {
+				sliceValue.Set(reflect.Append(sliceValue, reflect.Indirect(reflect.ValueOf(bean))))
+			}
+		} else if sliceValue.Kind() == reflect.Map {
+			var key = ids[j]
+			keyType := sliceValue.Type().Key()
+			var ikey interface{}
+			if len(key) == 1 {
+				ikey, err = str2PK(fmt.Sprintf("%v", key[0]), keyType)
+				if err != nil {
+					return err
+				}
+			} else {
+				if keyType.Kind() != reflect.Slice {
+					return errors.New("table have multiple primary keys, key is not core.PK or slice")
+				}
+				ikey = key
+			}
+
+			if t.Kind() == reflect.Ptr {
+				sliceValue.SetMapIndex(reflect.ValueOf(ikey), reflect.ValueOf(bean))
+			} else {
+				sliceValue.SetMapIndex(reflect.ValueOf(ikey), reflect.Indirect(reflect.ValueOf(bean)))
+			}
+		}
+	}
+
+	return nil
+}

session_get.go

@@ -0,0 +1,172 @@
+package xorm
+
+import (
+	"errors"
+	"reflect"
+	"strconv"
+
+	"github.com/xormplus/core"
+)
+
+// Get retrieve one record from database, bean's non-empty fields
+// will be as conditions
+func (session *Session) Get(bean interface{}) (bool, error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	session.Statement.setRefValue(rValue(bean))
+
+	var sqlStr string
+	var args []interface{}
+
+	if session.Statement.RawSQL == "" {
+		if len(session.Statement.TableName()) <= 0 {
+			return false, ErrTableNotFound
+		}
+		session.Statement.Limit(1)
+		sqlStr, args = session.Statement.genGetSQL(bean)
+	} else {
+		sqlStr = session.Statement.RawSQL
+		args = session.Statement.RawParams
+	}
+
+	if session.canCache() {
+		if cacher := session.Engine.getCacher2(session.Statement.RefTable); cacher != nil &&
+			!session.Statement.unscoped {
+			has, err := session.cacheGet(bean, sqlStr, args...)
+			if err != ErrCacheFailed {
+				return has, err
+			}
+		}
+	}
+
+	return session.nocacheGet(bean, sqlStr, args...)
+}
+
+func (session *Session) nocacheGet(bean interface{}, sqlStr string, args ...interface{}) (bool, error) {
+	var rawRows *core.Rows
+	var err error
+	session.queryPreprocess(&sqlStr, args...)
+	if session.IsAutoCommit {
+		_, rawRows, err = session.innerQuery(sqlStr, args...)
+	} else {
+		rawRows, err = session.Tx.Query(sqlStr, args...)
+	}
+	if err != nil {
+		return false, err
+	}
+
+	defer rawRows.Close()
+
+	if rawRows.Next() {
+		if fields, err := rawRows.Columns(); err == nil {
+			err = session.row2Bean(rawRows, fields, len(fields), bean)
+		}
+		return true, err
+	}
+	return false, nil
+}
+
+func (session *Session) cacheGet(bean interface{}, sqlStr string, args ...interface{}) (has bool, err error) {
+	// if has no reftable, then don't use cache currently
+	if !session.canCache() {
+		return false, ErrCacheFailed
+	}
+
+	for _, filter := range session.Engine.dialect.Filters() {
+		sqlStr = filter.Do(sqlStr, session.Engine.dialect, session.Statement.RefTable)
+	}
+	newsql := session.Statement.convertIDSQL(sqlStr)
+	if newsql == "" {
+		return false, ErrCacheFailed
+	}
+
+	cacher := session.Engine.getCacher2(session.Statement.RefTable)
+	tableName := session.Statement.TableName()
+	session.Engine.logger.Debug("[cacheGet] find sql:", newsql, args)
+	ids, err := core.GetCacheSql(cacher, tableName, newsql, args)
+	table := session.Statement.RefTable
+	if err != nil {
+		var res = make([]string, len(table.PrimaryKeys))
+		rows, err := session.DB().Query(newsql, args...)
+		if err != nil {
+			return false, err
+		}
+		defer rows.Close()
+
+		if rows.Next() {
+			err = rows.ScanSlice(&res)
+			if err != nil {
+				return false, err
+			}
+		} else {
+			return false, ErrCacheFailed
+		}
+
+		var pk core.PK = make([]interface{}, len(table.PrimaryKeys))
+		for i, col := range table.PKColumns() {
+			if col.SQLType.IsText() {
+				pk[i] = res[i]
+			} else if col.SQLType.IsNumeric() {
+				n, err := strconv.ParseInt(res[i], 10, 64)
+				if err != nil {
+					return false, err
+				}
+				pk[i] = n
+			} else {
+				return false, errors.New("unsupported")
+			}
+		}
+
+		ids = []core.PK{pk}
+		session.Engine.logger.Debug("[cacheGet] cache ids:", newsql, ids)
+		err = core.PutCacheSql(cacher, ids, tableName, newsql, args)
+		if err != nil {
+			return false, err
+		}
+	} else {
+		session.Engine.logger.Debug("[cacheGet] cache hit sql:", newsql)
+	}
+
+	if len(ids) > 0 {
+		structValue := reflect.Indirect(reflect.ValueOf(bean))
+		id := ids[0]
+		session.Engine.logger.Debug("[cacheGet] get bean:", tableName, id)
+		sid, err := id.ToString()
+		if err != nil {
+			return false, err
+		}
+		cacheBean := cacher.GetBean(tableName, sid)
+		if cacheBean == nil {
+			/*newSession := session.Engine.NewSession()
+			defer newSession.Close()
+			cacheBean = reflect.New(structValue.Type()).Interface()
+			newSession.Id(id).NoCache()
+			if session.Statement.AltTableName != "" {
+				newSession.Table(session.Statement.AltTableName)
+			}
+			if !session.Statement.UseCascade {
+				newSession.NoCascade()
+			}
+			has, err = newSession.Get(cacheBean)
+			*/
+			cacheBean = bean
+			has, err = session.nocacheGet(cacheBean, sqlStr, args...)
+			if err != nil || !has {
+				return has, err
+			}
+
+			session.Engine.logger.Debug("[cacheGet] cache bean:", tableName, id, cacheBean)
+			cacher.PutBean(tableName, sid, cacheBean)
+		} else {
+			session.Engine.logger.Debug("[cacheGet] cache hit bean:", tableName, id, cacheBean)
+			has = true
+		}
+		structValue.Set(reflect.Indirect(reflect.ValueOf(cacheBean)))
+
+		return has, nil
+	}
+	return false, nil
+}

session_insert.go

@@ -0,0 +1,527 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package xorm
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+	"strconv"
+	"strings"
+
+	"github.com/xormplus/core"
+)
+
+// Insert insert one or more beans
+func (session *Session) Insert(beans ...interface{}) (int64, error) {
+	var affected int64
+	var err error
+
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+	defer session.resetStatement()
+
+	for _, bean := range beans {
+		sliceValue := reflect.Indirect(reflect.ValueOf(bean))
+		if sliceValue.Kind() == reflect.Slice {
+			size := sliceValue.Len()
+			if size > 0 {
+				if session.Engine.SupportInsertMany() {
+					cnt, err := session.innerInsertMulti(bean)
+					if err != nil {
+						return affected, err
+					}
+					affected += cnt
+				} else {
+					for i := 0; i < size; i++ {
+						cnt, err := session.innerInsert(sliceValue.Index(i).Interface())
+						if err != nil {
+							return affected, err
+						}
+						affected += cnt
+					}
+				}
+			}
+		} else {
+			cnt, err := session.innerInsert(bean)
+			if err != nil {
+				return affected, err
+			}
+			affected += cnt
+		}
+	}
+
+	return affected, err
+}
+
+func (session *Session) innerInsertMulti(rowsSlicePtr interface{}) (int64, error) {
+	sliceValue := reflect.Indirect(reflect.ValueOf(rowsSlicePtr))
+	if sliceValue.Kind() != reflect.Slice {
+		return 0, errors.New("needs a pointer to a slice")
+	}
+
+	if sliceValue.Len() <= 0 {
+		return 0, errors.New("could not insert a empty slice")
+	}
+
+	session.Statement.setRefValue(sliceValue.Index(0))
+
+	if len(session.Statement.TableName()) <= 0 {
+		return 0, ErrTableNotFound
+	}
+
+	table := session.Statement.RefTable
+	size := sliceValue.Len()
+
+	var colNames []string
+	var colMultiPlaces []string
+	var args []interface{}
+	var cols []*core.Column
+
+	for i := 0; i < size; i++ {
+		v := sliceValue.Index(i)
+		vv := reflect.Indirect(v)
+		elemValue := v.Interface()
+		var colPlaces []string
+
+		// handle BeforeInsertProcessor
+		// !nashtsai! does user expect it's same slice to passed closure when using Before()/After() when insert multi??
+		for _, closure := range session.beforeClosures {
+			closure(elemValue)
+		}
+
+		if processor, ok := interface{}(elemValue).(BeforeInsertProcessor); ok {
+			processor.BeforeInsert()
+		}
+		// --
+
+		if i == 0 {
+			for _, col := range table.Columns() {
+				ptrFieldValue, err := col.ValueOfV(&vv)
+				if err != nil {
+					return 0, err
+				}
+				fieldValue := *ptrFieldValue
+				if col.IsAutoIncrement && isZero(fieldValue.Interface()) {
+					continue
+				}
+				if col.MapType == core.ONLYFROMDB {
+					continue
+				}
+				if col.IsDeleted {
+					continue
+				}
+				if session.Statement.ColumnStr != "" {
+					if _, ok := getFlagForColumn(session.Statement.columnMap, col); !ok {
+						continue
+					}
+				}
+				if session.Statement.OmitStr != "" {
+					if _, ok := getFlagForColumn(session.Statement.columnMap, col); ok {
+						continue
+					}
+				}
+				if (col.IsCreated || col.IsUpdated) && session.Statement.UseAutoTime {
+					val, t := session.Engine.NowTime2(col.SQLType.Name)
+					args = append(args, val)
+
+					var colName = col.Name
+					session.afterClosures = append(session.afterClosures, func(bean interface{}) {
+						col := table.GetColumn(colName)
+						setColumnTime(bean, col, t)
+					})
+				} else if col.IsVersion && session.Statement.checkVersion {
+					args = append(args, 1)
+					var colName = col.Name
+					session.afterClosures = append(session.afterClosures, func(bean interface{}) {
+						col := table.GetColumn(colName)
+						setColumnInt(bean, col, 1)
+					})
+				} else {
+					arg, err := session.value2Interface(col, fieldValue)
+					if err != nil {
+						return 0, err
+					}
+					args = append(args, arg)
+				}
+
+				colNames = append(colNames, col.Name)
+				cols = append(cols, col)
+				colPlaces = append(colPlaces, "?")
+			}
+		} else {
+			for _, col := range cols {
+				ptrFieldValue, err := col.ValueOfV(&vv)
+				if err != nil {
+					return 0, err
+				}
+				fieldValue := *ptrFieldValue
+
+				if col.IsAutoIncrement && isZero(fieldValue.Interface()) {
+					continue
+				}
+				if col.MapType == core.ONLYFROMDB {
+					continue
+				}
+				if col.IsDeleted {
+					continue
+				}
+				if session.Statement.ColumnStr != "" {
+					if _, ok := getFlagForColumn(session.Statement.columnMap, col); !ok {
+						continue
+					}
+				}
+				if session.Statement.OmitStr != "" {
+					if _, ok := getFlagForColumn(session.Statement.columnMap, col); ok {
+						continue
+					}
+				}
+				if (col.IsCreated || col.IsUpdated) && session.Statement.UseAutoTime {
+					val, t := session.Engine.NowTime2(col.SQLType.Name)
+					args = append(args, val)
+
+					var colName = col.Name
+					session.afterClosures = append(session.afterClosures, func(bean interface{}) {
+						col := table.GetColumn(colName)
+						setColumnTime(bean, col, t)
+					})
+				} else if col.IsVersion && session.Statement.checkVersion {
+					args = append(args, 1)
+					var colName = col.Name
+					session.afterClosures = append(session.afterClosures, func(bean interface{}) {
+						col := table.GetColumn(colName)
+						setColumnInt(bean, col, 1)
+					})
+				} else {
+					arg, err := session.value2Interface(col, fieldValue)
+					if err != nil {
+						return 0, err
+					}
+					args = append(args, arg)
+				}
+
+				colPlaces = append(colPlaces, "?")
+			}
+		}
+		colMultiPlaces = append(colMultiPlaces, strings.Join(colPlaces, ", "))
+	}
+	cleanupProcessorsClosures(&session.beforeClosures)
+
+	statement := fmt.Sprintf("INSERT INTO %s (%v%v%v) VALUES (%v)",
+		session.Engine.Quote(session.Statement.TableName()),
+		session.Engine.QuoteStr(),
+		strings.Join(colNames, session.Engine.QuoteStr()+", "+session.Engine.QuoteStr()),
+		session.Engine.QuoteStr(),
+		strings.Join(colMultiPlaces, "),("))
+
+	res, err := session.exec(statement, args...)
+	if err != nil {
+		return 0, err
+	}
+
+	if cacher := session.Engine.getCacher2(table); cacher != nil && session.Statement.UseCache {
+		session.cacheInsert(session.Statement.TableName())
+	}
+
+	lenAfterClosures := len(session.afterClosures)
+	for i := 0; i < size; i++ {
+		elemValue := reflect.Indirect(sliceValue.Index(i)).Addr().Interface()
+
+		// handle AfterInsertProcessor
+		if session.IsAutoCommit {
+			// !nashtsai! does user expect it's same slice to passed closure when using Before()/After() when insert multi??
+			for _, closure := range session.afterClosures {
+				closure(elemValue)
+			}
+			if processor, ok := interface{}(elemValue).(AfterInsertProcessor); ok {
+				processor.AfterInsert()
+			}
+		} else {
+			if lenAfterClosures > 0 {
+				if value, has := session.afterInsertBeans[elemValue]; has && value != nil {
+					*value = append(*value, session.afterClosures...)
+				} else {
+					afterClosures := make([]func(interface{}), lenAfterClosures)
+					copy(afterClosures, session.afterClosures)
+					session.afterInsertBeans[elemValue] = &afterClosures
+				}
+			} else {
+				if _, ok := interface{}(elemValue).(AfterInsertProcessor); ok {
+					session.afterInsertBeans[elemValue] = nil
+				}
+			}
+		}
+	}
+
+	cleanupProcessorsClosures(&session.afterClosures)
+	return res.RowsAffected()
+}
+
+// InsertMulti insert multiple records
+func (session *Session) InsertMulti(rowsSlicePtr interface{}) (int64, error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	sliceValue := reflect.Indirect(reflect.ValueOf(rowsSlicePtr))
+	if sliceValue.Kind() != reflect.Slice {
+		return 0, ErrParamsType
+
+	}
+
+	if sliceValue.Len() <= 0 {
+		return 0, nil
+	}
+
+	return session.innerInsertMulti(rowsSlicePtr)
+}
+
+func (session *Session) innerInsert(bean interface{}) (int64, error) {
+	session.Statement.setRefValue(rValue(bean))
+	if len(session.Statement.TableName()) <= 0 {
+		return 0, ErrTableNotFound
+	}
+
+	table := session.Statement.RefTable
+
+	// handle BeforeInsertProcessor
+	for _, closure := range session.beforeClosures {
+		closure(bean)
+	}
+	cleanupProcessorsClosures(&session.beforeClosures) // cleanup after used
+
+	if processor, ok := interface{}(bean).(BeforeInsertProcessor); ok {
+		processor.BeforeInsert()
+	}
+	// --
+	colNames, args, err := genCols(session.Statement.RefTable, session, bean, false, false)
+	if err != nil {
+		return 0, err
+	}
+	// insert expr columns, override if exists
+	exprColumns := session.Statement.getExpr()
+	exprColVals := make([]string, 0, len(exprColumns))
+	for _, v := range exprColumns {
+		// remove the expr columns
+		for i, colName := range colNames {
+			if colName == v.colName {
+				colNames = append(colNames[:i], colNames[i+1:]...)
+				args = append(args[:i], args[i+1:]...)
+			}
+		}
+
+		// append expr column to the end
+		colNames = append(colNames, v.colName)
+		exprColVals = append(exprColVals, v.expr)
+	}
+
+	colPlaces := strings.Repeat("?, ", len(colNames)-len(exprColumns))
+	if len(exprColVals) > 0 {
+		colPlaces = colPlaces + strings.Join(exprColVals, ", ")
+	} else {
+		colPlaces = colPlaces[0 : len(colPlaces)-2]
+	}
+
+	sqlStr := fmt.Sprintf("INSERT INTO %s (%v%v%v) VALUES (%v)",
+		session.Engine.Quote(session.Statement.TableName()),
+		session.Engine.QuoteStr(),
+		strings.Join(colNames, session.Engine.Quote(", ")),
+		session.Engine.QuoteStr(),
+		colPlaces)
+
+	handleAfterInsertProcessorFunc := func(bean interface{}) {
+		if session.IsAutoCommit {
+			for _, closure := range session.afterClosures {
+				closure(bean)
+			}
+			if processor, ok := interface{}(bean).(AfterInsertProcessor); ok {
+				processor.AfterInsert()
+			}
+		} else {
+			lenAfterClosures := len(session.afterClosures)
+			if lenAfterClosures > 0 {
+				if value, has := session.afterInsertBeans[bean]; has && value != nil {
+					*value = append(*value, session.afterClosures...)
+				} else {
+					afterClosures := make([]func(interface{}), lenAfterClosures)
+					copy(afterClosures, session.afterClosures)
+					session.afterInsertBeans[bean] = &afterClosures
+				}
+
+			} else {
+				if _, ok := interface{}(bean).(AfterInsertProcessor); ok {
+					session.afterInsertBeans[bean] = nil
+				}
+			}
+		}
+		cleanupProcessorsClosures(&session.afterClosures) // cleanup after used
+	}
+
+	// for postgres, many of them didn't implement lastInsertId, so we should
+	// implemented it ourself.
+	if session.Engine.dialect.DBType() == core.ORACLE && len(table.AutoIncrement) > 0 {
+		//assert table.AutoIncrement != ""
+		res, err := session.query("select seq_atable.currval from dual", args...)
+		if err != nil {
+			return 0, err
+		}
+
+		handleAfterInsertProcessorFunc(bean)
+
+		if cacher := session.Engine.getCacher2(table); cacher != nil && session.Statement.UseCache {
+			session.cacheInsert(session.Statement.TableName())
+		}
+
+		if table.Version != "" && session.Statement.checkVersion {
+			verValue, err := table.VersionColumn().ValueOf(bean)
+			if err != nil {
+				session.Engine.logger.Error(err)
+			} else if verValue.IsValid() && verValue.CanSet() {
+				verValue.SetInt(1)
+			}
+		}
+
+		if len(res) < 1 {
+			return 0, errors.New("insert no error but not returned id")
+		}
+
+		idByte := res[0][table.AutoIncrement]
+		id, err := strconv.ParseInt(string(idByte), 10, 64)
+		if err != nil || id <= 0 {
+			return 1, err
+		}
+
+		aiValue, err := table.AutoIncrColumn().ValueOf(bean)
+		if err != nil {
+			session.Engine.logger.Error(err)
+		}
+
+		if aiValue == nil || !aiValue.IsValid() || !aiValue.CanSet() {
+			return 1, nil
+		}
+
+		aiValue.Set(int64ToIntValue(id, aiValue.Type()))
+
+		return 1, nil
+	} else if session.Engine.dialect.DBType() == core.POSTGRES && len(table.AutoIncrement) > 0 {
+		//assert table.AutoIncrement != ""
+		sqlStr = sqlStr + " RETURNING " + session.Engine.Quote(table.AutoIncrement)
+		res, err := session.query(sqlStr, args...)
+
+		if err != nil {
+			return 0, err
+		}
+		handleAfterInsertProcessorFunc(bean)
+
+		if cacher := session.Engine.getCacher2(table); cacher != nil && session.Statement.UseCache {
+			session.cacheInsert(session.Statement.TableName())
+		}
+
+		if table.Version != "" && session.Statement.checkVersion {
+			verValue, err := table.VersionColumn().ValueOf(bean)
+			if err != nil {
+				session.Engine.logger.Error(err)
+			} else if verValue.IsValid() && verValue.CanSet() {
+				verValue.SetInt(1)
+			}
+		}
+
+		if len(res) < 1 {
+			return 0, errors.New("insert no error but not returned id")
+		}
+
+		idByte := res[0][table.AutoIncrement]
+		id, err := strconv.ParseInt(string(idByte), 10, 64)
+		if err != nil || id <= 0 {
+			return 1, err
+		}
+
+		aiValue, err := table.AutoIncrColumn().ValueOf(bean)
+		if err != nil {
+			session.Engine.logger.Error(err)
+		}
+
+		if aiValue == nil || !aiValue.IsValid() || !aiValue.CanSet() {
+			return 1, nil
+		}
+
+		aiValue.Set(int64ToIntValue(id, aiValue.Type()))
+
+		return 1, nil
+	} else {
+		res, err := session.exec(sqlStr, args...)
+		if err != nil {
+			return 0, err
+		}
+
+		defer handleAfterInsertProcessorFunc(bean)
+
+		if cacher := session.Engine.getCacher2(table); cacher != nil && session.Statement.UseCache {
+			session.cacheInsert(session.Statement.TableName())
+		}
+
+		if table.Version != "" && session.Statement.checkVersion {
+			verValue, err := table.VersionColumn().ValueOf(bean)
+			if err != nil {
+				session.Engine.logger.Error(err)
+			} else if verValue.IsValid() && verValue.CanSet() {
+				verValue.SetInt(1)
+			}
+		}
+
+		if table.AutoIncrement == "" {
+			return res.RowsAffected()
+		}
+
+		var id int64
+		id, err = res.LastInsertId()
+		if err != nil || id <= 0 {
+			return res.RowsAffected()
+		}
+
+		aiValue, err := table.AutoIncrColumn().ValueOf(bean)
+		if err != nil {
+			session.Engine.logger.Error(err)
+		}
+
+		if aiValue == nil || !aiValue.IsValid() || !aiValue.CanSet() {
+			return res.RowsAffected()
+		}
+
+		aiValue.Set(int64ToIntValue(id, aiValue.Type()))
+
+		return res.RowsAffected()
+	}
+}
+
+// InsertOne insert only one struct into database as a record.
+// The in parameter bean must a struct or a point to struct. The return
+// parameter is inserted and error
+func (session *Session) InsertOne(bean interface{}) (int64, error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	return session.innerInsert(bean)
+}
+
+func (session *Session) cacheInsert(tables ...string) error {
+	if session.Statement.RefTable == nil {
+		return ErrCacheFailed
+	}
+
+	table := session.Statement.RefTable
+	cacher := session.Engine.getCacher2(table)
+
+	for _, t := range tables {
+		session.Engine.logger.Debug("[cache] clear sql:", t)
+		cacher.ClearIds(t)
+	}
+
+	return nil
+}

session_iterate.go

@@ -0,0 +1,42 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package xorm
+
+import "reflect"
+
+// IterFunc only use by Iterate
+type IterFunc func(idx int, bean interface{}) error
+
+// Rows return sql.Rows compatible Rows obj, as a forward Iterator object for iterating record by record, bean's non-empty fields
+// are conditions.
+func (session *Session) Rows(bean interface{}) (*Rows, error) {
+	return newRows(session, bean)
+}
+
+// Iterate record by record handle records from table, condiBeans's non-empty fields
+// are conditions. beans could be []Struct, []*Struct, map[int64]Struct
+// map[int64]*Struct
+func (session *Session) Iterate(bean interface{}, fun IterFunc) error {
+	rows, err := session.Rows(bean)
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+
+	i := 0
+	for rows.Next() {
+		b := reflect.New(rows.beanType).Interface()
+		err = rows.Scan(b)
+		if err != nil {
+			return err
+		}
+		err = fun(i, b)
+		if err != nil {
+			return err
+		}
+		i++
+	}
+	return err
+}

session_raw.go

@@ -0,0 +1,145 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package xorm
+
+import (
+	"database/sql"
+
+	"github.com/xormplus/core"
+)
+
+func (session *Session) query(sqlStr string, paramStr ...interface{}) (resultsSlice []map[string][]byte, err error) {
+
+	session.queryPreprocess(&sqlStr, paramStr...)
+
+	if session.IsAutoCommit {
+		return session.innerQuery2(sqlStr, paramStr...)
+	}
+	return session.txQuery(session.Tx, sqlStr, paramStr...)
+}
+
+func (session *Session) txQuery(tx *core.Tx, sqlStr string, params ...interface{}) (resultsSlice []map[string][]byte, err error) {
+	rows, err := tx.Query(sqlStr, params...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	return rows2maps(rows)
+}
+
+func (session *Session) innerQuery(sqlStr string, params ...interface{}) (*core.Stmt, *core.Rows, error) {
+	var callback func() (*core.Stmt, *core.Rows, error)
+	if session.prepareStmt {
+		callback = func() (*core.Stmt, *core.Rows, error) {
+			stmt, err := session.doPrepare(sqlStr)
+			if err != nil {
+				return nil, nil, err
+			}
+			rows, err := stmt.Query(params...)
+			if err != nil {
+				return nil, nil, err
+			}
+			return stmt, rows, nil
+		}
+	} else {
+		callback = func() (*core.Stmt, *core.Rows, error) {
+			rows, err := session.DB().Query(sqlStr, params...)
+			if err != nil {
+				return nil, nil, err
+			}
+			return nil, rows, err
+		}
+	}
+	stmt, rows, err := session.Engine.logSQLQueryTime(sqlStr, params, callback)
+	if err != nil {
+		return nil, nil, err
+	}
+	return stmt, rows, nil
+}
+
+func (session *Session) innerQuery2(sqlStr string, params ...interface{}) ([]map[string][]byte, error) {
+	_, rows, err := session.innerQuery(sqlStr, params...)
+	if rows != nil {
+		defer rows.Close()
+	}
+	if err != nil {
+		return nil, err
+	}
+	return rows2maps(rows)
+}
+
+// Exec a raw sql and return records as []map[string][]byte
+func (session *Session) query1(sqlStr string, paramStr ...interface{}) (resultsSlice []map[string][]byte, err error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	return session.query(sqlStr, paramStr...)
+}
+
+// =============================
+// for string
+// =============================
+func (session *Session) query2(sqlStr string, paramStr ...interface{}) (resultsSlice []map[string]string, err error) {
+	session.queryPreprocess(&sqlStr, paramStr...)
+
+	if session.IsAutoCommit {
+		return query2(session.DB(), sqlStr, paramStr...)
+	}
+	return txQuery2(session.Tx, sqlStr, paramStr...)
+}
+
+// Execute sql
+func (session *Session) innerExec(sqlStr string, args ...interface{}) (sql.Result, error) {
+	if session.prepareStmt {
+		stmt, err := session.doPrepare(sqlStr)
+		if err != nil {
+			return nil, err
+		}
+
+		res, err := stmt.Exec(args...)
+		if err != nil {
+			return nil, err
+		}
+		return res, nil
+	}
+
+	return session.DB().Exec(sqlStr, args...)
+}
+
+func (session *Session) exec(sqlStr string, args ...interface{}) (sql.Result, error) {
+	for _, filter := range session.Engine.dialect.Filters() {
+		// TODO: for table name, it's no need to RefTable
+		sqlStr = filter.Do(sqlStr, session.Engine.dialect, session.Statement.RefTable)
+	}
+
+	session.saveLastSQL(sqlStr, args...)
+
+	return session.Engine.logSQLExecutionTime(sqlStr, args, func() (sql.Result, error) {
+		if session.IsAutoCommit {
+			// FIXME: oci8 can not auto commit (github.com/mattn/go-oci8)
+			if session.Engine.dialect.DBType() == core.ORACLE {
+				session.begin()
+				r, err := session.Tx.Exec(sqlStr, args...)
+				session.commit()
+				return r, err
+			}
+			return session.innerExec(sqlStr, args...)
+		}
+		return session.Tx.Exec(sqlStr, args...)
+	})
+}
+
+// Exec raw sql
+func (session *Session) Exec(sqlStr string, args ...interface{}) (sql.Result, error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	return session.exec(sqlStr, args...)
+}

session_schema.go

@@ -0,0 +1,486 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package xorm
+
+import (
+	"database/sql"
+	"errors"
+	"fmt"
+	"reflect"
+	"strings"
+
+	"github.com/xormplus/core"
+)
+
+// Ping test if database is ok
+func (session *Session) Ping() error {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	return session.DB().Ping()
+}
+
+// CreateTable create a table according a bean
+func (session *Session) CreateTable(bean interface{}) error {
+	v := rValue(bean)
+	session.Statement.setRefValue(v)
+
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	return session.createOneTable()
+}
+
+// CreateIndexes create indexes
+func (session *Session) CreateIndexes(bean interface{}) error {
+	v := rValue(bean)
+	session.Statement.setRefValue(v)
+
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	sqls := session.Statement.genIndexSQL()
+	for _, sqlStr := range sqls {
+		_, err := session.exec(sqlStr)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// CreateUniques create uniques
+func (session *Session) CreateUniques(bean interface{}) error {
+	v := rValue(bean)
+	session.Statement.setRefValue(v)
+
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	sqls := session.Statement.genUniqueSQL()
+	for _, sqlStr := range sqls {
+		_, err := session.exec(sqlStr)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (session *Session) createOneTable() error {
+	sqlStr := session.Statement.genCreateTableSQL()
+	_, err := session.exec(sqlStr)
+	return err
+}
+
+// to be deleted
+func (session *Session) createAll() error {
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	for _, table := range session.Engine.Tables {
+		session.Statement.RefTable = table
+		session.Statement.tableName = table.Name
+		err := session.createOneTable()
+		session.resetStatement()
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// DropIndexes drop indexes
+func (session *Session) DropIndexes(bean interface{}) error {
+	v := rValue(bean)
+	session.Statement.setRefValue(v)
+
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	sqls := session.Statement.genDelIndexSQL()
+	for _, sqlStr := range sqls {
+		_, err := session.exec(sqlStr)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// DropTable drop table will drop table if exist, if drop failed, it will return error
+func (session *Session) DropTable(beanOrTableName interface{}) error {
+	tableName, err := session.Engine.tableName(beanOrTableName)
+	if err != nil {
+		return err
+	}
+
+	var needDrop = true
+	if !session.Engine.dialect.SupportDropIfExists() {
+		sqlStr, args := session.Engine.dialect.TableCheckSql(tableName)
+		results, err := session.query(sqlStr, args...)
+		if err != nil {
+			return err
+		}
+		needDrop = len(results) > 0
+	}
+
+	if needDrop {
+		sqlStr := session.Engine.Dialect().DropTableSql(tableName)
+		_, err = session.exec(sqlStr)
+		return err
+	}
+	return nil
+}
+
+// IsTableExist if a table is exist
+func (session *Session) IsTableExist(beanOrTableName interface{}) (bool, error) {
+	tableName, err := session.Engine.tableName(beanOrTableName)
+	if err != nil {
+		return false, err
+	}
+
+	return session.isTableExist(tableName)
+}
+
+func (session *Session) isTableExist(tableName string) (bool, error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+	sqlStr, args := session.Engine.dialect.TableCheckSql(tableName)
+	results, err := session.query(sqlStr, args...)
+	return len(results) > 0, err
+}
+
+// IsTableEmpty if table have any records
+func (session *Session) IsTableEmpty(bean interface{}) (bool, error) {
+	v := rValue(bean)
+	t := v.Type()
+
+	if t.Kind() == reflect.String {
+		return session.isTableEmpty(bean.(string))
+	} else if t.Kind() == reflect.Struct {
+		rows, err := session.Count(bean)
+		return rows == 0, err
+	}
+	return false, errors.New("bean should be a struct or struct's point")
+}
+
+func (session *Session) isTableEmpty(tableName string) (bool, error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	var total int64
+	sqlStr := fmt.Sprintf("select count(*) from %s", session.Engine.Quote(tableName))
+	err := session.DB().QueryRow(sqlStr).Scan(&total)
+	session.saveLastSQL(sqlStr)
+	if err != nil {
+		if err == sql.ErrNoRows {
+			err = nil
+		}
+		return true, err
+	}
+
+	return total == 0, nil
+}
+
+func (session *Session) isIndexExist(tableName, idxName string, unique bool) (bool, error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+	var idx string
+	if unique {
+		idx = uniqueName(tableName, idxName)
+	} else {
+		idx = indexName(tableName, idxName)
+	}
+	sqlStr, args := session.Engine.dialect.IndexCheckSql(tableName, idx)
+	results, err := session.query(sqlStr, args...)
+	return len(results) > 0, err
+}
+
+// find if index is exist according cols
+func (session *Session) isIndexExist2(tableName string, cols []string, unique bool) (bool, error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	indexes, err := session.Engine.dialect.GetIndexes(tableName)
+	if err != nil {
+		return false, err
+	}
+
+	for _, index := range indexes {
+		if sliceEq(index.Cols, cols) {
+			if unique {
+				return index.Type == core.UniqueType, nil
+			}
+			return index.Type == core.IndexType, nil
+		}
+	}
+	return false, nil
+}
+
+func (session *Session) addColumn(colName string) error {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	col := session.Statement.RefTable.GetColumn(colName)
+	sql, args := session.Statement.genAddColumnStr(col)
+	_, err := session.exec(sql, args...)
+	return err
+}
+
+func (session *Session) addIndex(tableName, idxName string) error {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+	index := session.Statement.RefTable.Indexes[idxName]
+	sqlStr := session.Engine.dialect.CreateIndexSql(tableName, index)
+
+	_, err := session.exec(sqlStr)
+	return err
+}
+
+func (session *Session) addUnique(tableName, uqeName string) error {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+	index := session.Statement.RefTable.Indexes[uqeName]
+	sqlStr := session.Engine.dialect.CreateIndexSql(tableName, index)
+	_, err := session.exec(sqlStr)
+	return err
+}
+
+// To be deleted
+func (session *Session) dropAll() error {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	for _, table := range session.Engine.Tables {
+		session.Statement.Init()
+		session.Statement.RefTable = table
+		sqlStr := session.Engine.Dialect().DropTableSql(session.Statement.TableName())
+		_, err := session.exec(sqlStr)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// Sync2 synchronize structs to database tables
+func (session *Session) Sync2(beans ...interface{}) error {
+	engine := session.Engine
+
+	tables, err := engine.DBMetas()
+	if err != nil {
+		return err
+	}
+
+	var structTables []*core.Table
+
+	for _, bean := range beans {
+		v := rValue(bean)
+		table := engine.mapType(v)
+		structTables = append(structTables, table)
+		var tbName = session.tbNameNoSchema(table)
+
+		var oriTable *core.Table
+		for _, tb := range tables {
+			if strings.EqualFold(tb.Name, tbName) {
+				oriTable = tb
+				break
+			}
+		}
+
+		if oriTable == nil {
+			err = session.StoreEngine(session.Statement.StoreEngine).CreateTable(bean)
+			if err != nil {
+				return err
+			}
+
+			err = session.CreateUniques(bean)
+			if err != nil {
+				return err
+			}
+
+			err = session.CreateIndexes(bean)
+			if err != nil {
+				return err
+			}
+		} else {
+			for _, col := range table.Columns() {
+				var oriCol *core.Column
+				for _, col2 := range oriTable.Columns() {
+					if strings.EqualFold(col.Name, col2.Name) {
+						oriCol = col2
+						break
+					}
+				}
+
+				if oriCol != nil {
+					expectedType := engine.dialect.SqlType(col)
+					curType := engine.dialect.SqlType(oriCol)
+					if expectedType != curType {
+						if expectedType == core.Text &&
+							strings.HasPrefix(curType, core.Varchar) {
+							// currently only support mysql & postgres
+							if engine.dialect.DBType() == core.MYSQL ||
+								engine.dialect.DBType() == core.POSTGRES {
+								engine.logger.Infof("Table %s column %s change type from %s to %s\n",
+									tbName, col.Name, curType, expectedType)
+								_, err = engine.Exec(engine.dialect.ModifyColumnSql(table.Name, col))
+							} else {
+								engine.logger.Warnf("Table %s column %s db type is %s, struct type is %s\n",
+									tbName, col.Name, curType, expectedType)
+							}
+						} else if strings.HasPrefix(curType, core.Varchar) && strings.HasPrefix(expectedType, core.Varchar) {
+							if engine.dialect.DBType() == core.MYSQL {
+								if oriCol.Length < col.Length {
+									engine.logger.Infof("Table %s column %s change type from varchar(%d) to varchar(%d)\n",
+										tbName, col.Name, oriCol.Length, col.Length)
+									_, err = engine.Exec(engine.dialect.ModifyColumnSql(table.Name, col))
+								}
+							}
+						} else {
+							if !(strings.HasPrefix(curType, expectedType) && curType[len(expectedType)] == '(') {
+								engine.logger.Warnf("Table %s column %s db type is %s, struct type is %s",
+									tbName, col.Name, curType, expectedType)
+							}
+						}
+					} else if expectedType == core.Varchar {
+						if engine.dialect.DBType() == core.MYSQL {
+							if oriCol.Length < col.Length {
+								engine.logger.Infof("Table %s column %s change type from varchar(%d) to varchar(%d)\n",
+									tbName, col.Name, oriCol.Length, col.Length)
+								_, err = engine.Exec(engine.dialect.ModifyColumnSql(table.Name, col))
+							}
+						}
+					}
+					if col.Default != oriCol.Default {
+						engine.logger.Warnf("Table %s Column %s db default is %s, struct default is %s",
+							tbName, col.Name, oriCol.Default, col.Default)
+					}
+					if col.Nullable != oriCol.Nullable {
+						engine.logger.Warnf("Table %s Column %s db nullable is %v, struct nullable is %v",
+							tbName, col.Name, oriCol.Nullable, col.Nullable)
+					}
+				} else {
+					session := engine.NewSession()
+					session.Statement.RefTable = table
+					session.Statement.tableName = tbName
+					defer session.Close()
+					err = session.addColumn(col.Name)
+				}
+				if err != nil {
+					return err
+				}
+			}
+
+			var foundIndexNames = make(map[string]bool)
+			var addedNames = make(map[string]*core.Index)
+
+			for name, index := range table.Indexes {
+				var oriIndex *core.Index
+				for name2, index2 := range oriTable.Indexes {
+					if index.Equal(index2) {
+						oriIndex = index2
+						foundIndexNames[name2] = true
+						break
+					}
+				}
+
+				if oriIndex != nil {
+					if oriIndex.Type != index.Type {
+						sql := engine.dialect.DropIndexSql(tbName, oriIndex)
+						_, err = engine.Exec(sql)
+						if err != nil {
+							return err
+						}
+						oriIndex = nil
+					}
+				}
+
+				if oriIndex == nil {
+					addedNames[name] = index
+				}
+			}
+
+			for name2, index2 := range oriTable.Indexes {
+				if _, ok := foundIndexNames[name2]; !ok {
+					sql := engine.dialect.DropIndexSql(tbName, index2)
+					_, err = engine.Exec(sql)
+					if err != nil {
+						return err
+					}
+				}
+			}
+
+			for name, index := range addedNames {
+				if index.Type == core.UniqueType {
+					session := engine.NewSession()
+					session.Statement.RefTable = table
+					session.Statement.tableName = tbName
+					defer session.Close()
+					err = session.addUnique(tbName, name)
+				} else if index.Type == core.IndexType {
+					session := engine.NewSession()
+					session.Statement.RefTable = table
+					session.Statement.tableName = tbName
+					defer session.Close()
+					err = session.addIndex(tbName, name)
+				}
+				if err != nil {
+					return err
+				}
+			}
+		}
+	}
+
+	for _, table := range tables {
+		var oriTable *core.Table
+		for _, structTable := range structTables {
+			if strings.EqualFold(table.Name, session.tbNameNoSchema(structTable)) {
+				oriTable = structTable
+				break
+			}
+		}
+
+		if oriTable == nil {
+			//engine.LogWarnf("Table %s has no struct to mapping it", table.Name)
+			continue
+		}
+
+		for _, colName := range table.ColumnsSeq() {
+			if oriTable.GetColumn(colName) == nil {
+				engine.logger.Warnf("Table %s has column %s but struct has not related field", table.Name, colName)
+			}
+		}
+	}
+	return nil
+}

session_sum.go

@@ -0,0 +1,137 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package xorm
+
+import "database/sql"
+
+// Count counts the records. bean's non-empty fields
+// are conditions.
+func (session *Session) Count(bean interface{}) (int64, error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	var sqlStr string
+	var args []interface{}
+	if session.Statement.RawSQL == "" {
+		sqlStr, args = session.Statement.genCountSQL(bean)
+	} else {
+		sqlStr = session.Statement.RawSQL
+		args = session.Statement.RawParams
+	}
+
+	session.queryPreprocess(&sqlStr, args...)
+
+	var err error
+	var total int64
+	if session.IsAutoCommit {
+		err = session.DB().QueryRow(sqlStr, args...).Scan(&total)
+	} else {
+		err = session.Tx.QueryRow(sqlStr, args...).Scan(&total)
+	}
+
+	if err == sql.ErrNoRows || err == nil {
+		return total, nil
+	}
+
+	return 0, err
+}
+
+// Sum call sum some column. bean's non-empty fields are conditions.
+func (session *Session) Sum(bean interface{}, columnName string) (float64, error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	var sqlStr string
+	var args []interface{}
+	if len(session.Statement.RawSQL) == 0 {
+		sqlStr, args = session.Statement.genSumSQL(bean, columnName)
+	} else {
+		sqlStr = session.Statement.RawSQL
+		args = session.Statement.RawParams
+	}
+
+	session.queryPreprocess(&sqlStr, args...)
+
+	var err error
+	var res float64
+	if session.IsAutoCommit {
+		err = session.DB().QueryRow(sqlStr, args...).Scan(&res)
+	} else {
+		err = session.Tx.QueryRow(sqlStr, args...).Scan(&res)
+	}
+
+	if err == sql.ErrNoRows || err == nil {
+		return res, nil
+	}
+	return 0, err
+}
+
+// Sums call sum some columns. bean's non-empty fields are conditions.
+func (session *Session) Sums(bean interface{}, columnNames ...string) ([]float64, error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	var sqlStr string
+	var args []interface{}
+	if len(session.Statement.RawSQL) == 0 {
+		sqlStr, args = session.Statement.genSumSQL(bean, columnNames...)
+	} else {
+		sqlStr = session.Statement.RawSQL
+		args = session.Statement.RawParams
+	}
+
+	session.queryPreprocess(&sqlStr, args...)
+
+	var err error
+	var res = make([]float64, len(columnNames), len(columnNames))
+	if session.IsAutoCommit {
+		err = session.DB().QueryRow(sqlStr, args...).ScanSlice(&res)
+	} else {
+		err = session.Tx.QueryRow(sqlStr, args...).ScanSlice(&res)
+	}
+
+	if err == sql.ErrNoRows || err == nil {
+		return res, nil
+	}
+	return nil, err
+}
+
+// SumsInt sum specify columns and return as []int64 instead of []float64
+func (session *Session) SumsInt(bean interface{}, columnNames ...string) ([]int64, error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	var sqlStr string
+	var args []interface{}
+	if len(session.Statement.RawSQL) == 0 {
+		sqlStr, args = session.Statement.genSumSQL(bean, columnNames...)
+	} else {
+		sqlStr = session.Statement.RawSQL
+		args = session.Statement.RawParams
+	}
+
+	session.queryPreprocess(&sqlStr, args...)
+
+	var err error
+	var res = make([]int64, 0, len(columnNames))
+	if session.IsAutoCommit {
+		err = session.DB().QueryRow(sqlStr, args...).ScanSlice(&res)
+	} else {
+		err = session.Tx.QueryRow(sqlStr, args...).ScanSlice(&res)
+	}
+
+	if err == sql.ErrNoRows || err == nil {
+		return res, nil
+	}
+	return nil, err
+}

session_tx.go

@@ -0,0 +1,79 @@
+package xorm
+
+// Begin a transaction
+func (session *Session) begin() error {
+	if session.IsAutoCommit {
+		tx, err := session.DB().Begin()
+		if err != nil {
+			return err
+		}
+		session.IsAutoCommit = false
+		session.IsCommitedOrRollbacked = false
+		session.Tx = tx
+		session.saveLastSQL("BEGIN TRANSACTION")
+	}
+	return nil
+}
+
+// Rollback When using transaction, you can rollback if any error
+func (session *Session) rollback() error {
+	if !session.IsAutoCommit && !session.IsCommitedOrRollbacked {
+		session.saveLastSQL(session.Engine.dialect.RollBackStr())
+		session.IsCommitedOrRollbacked = true
+		return session.Tx.Rollback()
+	}
+	return nil
+}
+
+// Commit When using transaction, Commit will commit all operations.
+func (session *Session) commit() error {
+	if !session.IsAutoCommit && !session.IsCommitedOrRollbacked {
+		session.saveLastSQL("COMMIT")
+		session.IsCommitedOrRollbacked = true
+		var err error
+		if err = session.Tx.Commit(); err == nil {
+			// handle processors after tx committed
+
+			closureCallFunc := func(closuresPtr *[]func(interface{}), bean interface{}) {
+
+				if closuresPtr != nil {
+					for _, closure := range *closuresPtr {
+						closure(bean)
+					}
+				}
+			}
+
+			for bean, closuresPtr := range session.afterInsertBeans {
+				closureCallFunc(closuresPtr, bean)
+
+				if processor, ok := interface{}(bean).(AfterInsertProcessor); ok {
+					processor.AfterInsert()
+				}
+			}
+			for bean, closuresPtr := range session.afterUpdateBeans {
+				closureCallFunc(closuresPtr, bean)
+
+				if processor, ok := interface{}(bean).(AfterUpdateProcessor); ok {
+					processor.AfterUpdate()
+				}
+			}
+			for bean, closuresPtr := range session.afterDeleteBeans {
+				closureCallFunc(closuresPtr, bean)
+
+				if processor, ok := interface{}(bean).(AfterDeleteProcessor); ok {
+					processor.AfterDelete()
+				}
+			}
+			cleanUpFunc := func(slices *map[interface{}]*[]func(interface{})) {
+				if len(*slices) > 0 {
+					*slices = make(map[interface{}]*[]func(interface{}), 0)
+				}
+			}
+			cleanUpFunc(&session.afterInsertBeans)
+			cleanUpFunc(&session.afterUpdateBeans)
+			cleanUpFunc(&session.afterDeleteBeans)
+		}
+		return err
+	}
+	return nil
+}

session_update.go

@@ -0,0 +1,345 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package xorm
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+	"strconv"
+	"strings"
+
+	"github.com/go-xorm/builder"
+	"github.com/xormplus/core"
+)
+
+func (session *Session) cacheUpdate(sqlStr string, args ...interface{}) error {
+	if session.Statement.RefTable == nil ||
+		session.Tx != nil {
+		return ErrCacheFailed
+	}
+
+	oldhead, newsql := session.Statement.convertUpdateSQL(sqlStr)
+	if newsql == "" {
+		return ErrCacheFailed
+	}
+	for _, filter := range session.Engine.dialect.Filters() {
+		newsql = filter.Do(newsql, session.Engine.dialect, session.Statement.RefTable)
+	}
+	session.Engine.logger.Debug("[cacheUpdate] new sql", oldhead, newsql)
+
+	var nStart int
+	if len(args) > 0 {
+		if strings.Index(sqlStr, "?") > -1 {
+			nStart = strings.Count(oldhead, "?")
+		} else {
+			// only for pq, TODO: if any other databse?
+			nStart = strings.Count(oldhead, "$")
+		}
+	}
+	table := session.Statement.RefTable
+	cacher := session.Engine.getCacher2(table)
+	tableName := session.Statement.TableName()
+	session.Engine.logger.Debug("[cacheUpdate] get cache sql", newsql, args[nStart:])
+	ids, err := core.GetCacheSql(cacher, tableName, newsql, args[nStart:])
+	if err != nil {
+		rows, err := session.DB().Query(newsql, args[nStart:]...)
+		if err != nil {
+			return err
+		}
+		defer rows.Close()
+
+		ids = make([]core.PK, 0)
+		for rows.Next() {
+			var res = make([]string, len(table.PrimaryKeys))
+			err = rows.ScanSlice(&res)
+			if err != nil {
+				return err
+			}
+			var pk core.PK = make([]interface{}, len(table.PrimaryKeys))
+			for i, col := range table.PKColumns() {
+				if col.SQLType.IsNumeric() {
+					n, err := strconv.ParseInt(res[i], 10, 64)
+					if err != nil {
+						return err
+					}
+					pk[i] = n
+				} else if col.SQLType.IsText() {
+					pk[i] = res[i]
+				} else {
+					return errors.New("not supported")
+				}
+			}
+
+			ids = append(ids, pk)
+		}
+		session.Engine.logger.Debug("[cacheUpdate] find updated id", ids)
+	} /*else {
+	    session.Engine.LogDebug("[xorm:cacheUpdate] del cached sql:", tableName, newsql, args)
+	    cacher.DelIds(tableName, genSqlKey(newsql, args))
+	}*/
+
+	for _, id := range ids {
+		sid, err := id.ToString()
+		if err != nil {
+			return err
+		}
+		if bean := cacher.GetBean(tableName, sid); bean != nil {
+			sqls := splitNNoCase(sqlStr, "where", 2)
+			if len(sqls) == 0 || len(sqls) > 2 {
+				return ErrCacheFailed
+			}
+
+			sqls = splitNNoCase(sqls[0], "set", 2)
+			if len(sqls) != 2 {
+				return ErrCacheFailed
+			}
+			kvs := strings.Split(strings.TrimSpace(sqls[1]), ",")
+			for idx, kv := range kvs {
+				sps := strings.SplitN(kv, "=", 2)
+				sps2 := strings.Split(sps[0], ".")
+				colName := sps2[len(sps2)-1]
+				if strings.Contains(colName, "`") {
+					colName = strings.TrimSpace(strings.Replace(colName, "`", "", -1))
+				} else if strings.Contains(colName, session.Engine.QuoteStr()) {
+					colName = strings.TrimSpace(strings.Replace(colName, session.Engine.QuoteStr(), "", -1))
+				} else {
+					session.Engine.logger.Debug("[cacheUpdate] cannot find column", tableName, colName)
+					return ErrCacheFailed
+				}
+
+				if col := table.GetColumn(colName); col != nil {
+					fieldValue, err := col.ValueOf(bean)
+					if err != nil {
+						session.Engine.logger.Error(err)
+					} else {
+						session.Engine.logger.Debug("[cacheUpdate] set bean field", bean, colName, fieldValue.Interface())
+						if col.IsVersion && session.Statement.checkVersion {
+							fieldValue.SetInt(fieldValue.Int() + 1)
+						} else {
+							fieldValue.Set(reflect.ValueOf(args[idx]))
+						}
+					}
+				} else {
+					session.Engine.logger.Errorf("[cacheUpdate] ERROR: column %v is not table %v's",
+						colName, table.Name)
+				}
+			}
+
+			session.Engine.logger.Debug("[cacheUpdate] update cache", tableName, id, bean)
+			cacher.PutBean(tableName, sid, bean)
+		}
+	}
+	session.Engine.logger.Debug("[cacheUpdate] clear cached table sql:", tableName)
+	cacher.ClearIds(tableName)
+	return nil
+}
+
+// Update records, bean's non-empty fields are updated contents,
+// condiBean' non-empty filds are conditions
+// CAUTION:
+//        1.bool will defaultly be updated content nor conditions
+//         You should call UseBool if you have bool to use.
+//        2.float32 & float64 may be not inexact as conditions
+func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int64, error) {
+	defer session.resetStatement()
+	if session.IsAutoClose {
+		defer session.Close()
+	}
+
+	v := rValue(bean)
+	t := v.Type()
+
+	var colNames []string
+	var args []interface{}
+
+	// handle before update processors
+	for _, closure := range session.beforeClosures {
+		closure(bean)
+	}
+	cleanupProcessorsClosures(&session.beforeClosures) // cleanup after used
+	if processor, ok := interface{}(bean).(BeforeUpdateProcessor); ok {
+		processor.BeforeUpdate()
+	}
+	// --
+
+	var err error
+	var isMap = t.Kind() == reflect.Map
+	var isStruct = t.Kind() == reflect.Struct
+	if isStruct {
+		session.Statement.setRefValue(v)
+
+		if len(session.Statement.TableName()) <= 0 {
+			return 0, ErrTableNotFound
+		}
+
+		if session.Statement.ColumnStr == "" {
+			colNames, args = buildUpdates(session.Engine, session.Statement.RefTable, bean, false, false,
+				false, false, session.Statement.allUseBool, session.Statement.useAllCols,
+				session.Statement.mustColumnMap, session.Statement.nullableMap,
+				session.Statement.columnMap, true, session.Statement.unscoped)
+		} else {
+			colNames, args, err = genCols(session.Statement.RefTable, session, bean, true, true)
+			if err != nil {
+				return 0, err
+			}
+		}
+	} else if isMap {
+		colNames = make([]string, 0)
+		args = make([]interface{}, 0)
+		bValue := reflect.Indirect(reflect.ValueOf(bean))
+
+		for _, v := range bValue.MapKeys() {
+			colNames = append(colNames, session.Engine.Quote(v.String())+" = ?")
+			args = append(args, bValue.MapIndex(v).Interface())
+		}
+	} else {
+		return 0, ErrParamsType
+	}
+
+	table := session.Statement.RefTable
+
+	if session.Statement.UseAutoTime && table != nil && table.Updated != "" {
+		colNames = append(colNames, session.Engine.Quote(table.Updated)+" = ?")
+		col := table.UpdatedColumn()
+		val, t := session.Engine.NowTime2(col.SQLType.Name)
+		args = append(args, val)
+
+		var colName = col.Name
+		if isStruct {
+			session.afterClosures = append(session.afterClosures, func(bean interface{}) {
+				col := table.GetColumn(colName)
+				setColumnTime(bean, col, t)
+			})
+		}
+	}
+
+	//for update action to like "column = column + ?"
+	incColumns := session.Statement.getInc()
+	for _, v := range incColumns {
+		colNames = append(colNames, session.Engine.Quote(v.colName)+" = "+session.Engine.Quote(v.colName)+" + ?")
+		args = append(args, v.arg)
+	}
+	//for update action to like "column = column - ?"
+	decColumns := session.Statement.getDec()
+	for _, v := range decColumns {
+		colNames = append(colNames, session.Engine.Quote(v.colName)+" = "+session.Engine.Quote(v.colName)+" - ?")
+		args = append(args, v.arg)
+	}
+	//for update action to like "column = expression"
+	exprColumns := session.Statement.getExpr()
+	for _, v := range exprColumns {
+		colNames = append(colNames, session.Engine.Quote(v.colName)+" = "+v.expr)
+	}
+
+	session.Statement.processIDParam()
+
+	var autoCond builder.Cond
+	if !session.Statement.noAutoCondition && len(condiBean) > 0 {
+		var err error
+		autoCond, err = session.Statement.buildConds(session.Statement.RefTable, condiBean[0], true, true, false, true, false)
+		if err != nil {
+			return 0, err
+		}
+	}
+
+	st := session.Statement
+	defer session.resetStatement()
+
+	var sqlStr string
+	var condArgs []interface{}
+	var condSQL string
+	cond := session.Statement.cond.And(autoCond)
+
+	doIncVer := false
+	var verValue *reflect.Value
+	if table != nil && table.Version != "" && session.Statement.checkVersion {
+		verValue, err = table.VersionColumn().ValueOf(bean)
+		if err != nil {
+			return 0, err
+		}
+
+		cond = cond.And(builder.Eq{session.Engine.Quote(table.Version): verValue.Interface()})
+		condSQL, condArgs, _ = builder.ToSQL(cond)
+
+		if len(condSQL) > 0 {
+			condSQL = "WHERE " + condSQL
+		}
+
+		if st.LimitN > 0 {
+			condSQL = condSQL + fmt.Sprintf(" LIMIT %d", st.LimitN)
+		}
+
+		sqlStr = fmt.Sprintf("UPDATE %v SET %v, %v %v",
+			session.Engine.Quote(session.Statement.TableName()),
+			strings.Join(colNames, ", "),
+			session.Engine.Quote(table.Version)+" = "+session.Engine.Quote(table.Version)+" + 1",
+			condSQL)
+
+		doIncVer = true
+	} else {
+		condSQL, condArgs, _ = builder.ToSQL(cond)
+		if len(condSQL) > 0 {
+			condSQL = "WHERE " + condSQL
+		}
+
+		if st.LimitN > 0 {
+			condSQL = condSQL + fmt.Sprintf(" LIMIT %d", st.LimitN)
+		}
+
+		sqlStr = fmt.Sprintf("UPDATE %v SET %v %v",
+			session.Engine.Quote(session.Statement.TableName()),
+			strings.Join(colNames, ", "),
+			condSQL)
+	}
+
+	res, err := session.exec(sqlStr, append(args, condArgs...)...)
+	if err != nil {
+		return 0, err
+	} else if doIncVer {
+		if verValue != nil && verValue.IsValid() && verValue.CanSet() {
+			verValue.SetInt(verValue.Int() + 1)
+		}
+	}
+
+	if table != nil {
+		if cacher := session.Engine.getCacher2(table); cacher != nil && session.Statement.UseCache {
+			cacher.ClearIds(session.Statement.TableName())
+			cacher.ClearBeans(session.Statement.TableName())
+		}
+	}
+
+	// handle after update processors
+	if session.IsAutoCommit {
+		for _, closure := range session.afterClosures {
+			closure(bean)
+		}
+		if processor, ok := interface{}(bean).(AfterUpdateProcessor); ok {
+			session.Engine.logger.Debug("[event]", session.Statement.TableName(), " has after update processor")
+			processor.AfterUpdate()
+		}
+	} else {
+		lenAfterClosures := len(session.afterClosures)
+		if lenAfterClosures > 0 {
+			if value, has := session.afterUpdateBeans[bean]; has && value != nil {
+				*value = append(*value, session.afterClosures...)
+			} else {
+				afterClosures := make([]func(interface{}), lenAfterClosures)
+				copy(afterClosures, session.afterClosures)
+				// FIXME: if bean is a map type, it will panic because map cannot be as map key
+				session.afterUpdateBeans[bean] = &afterClosures
+			}
+
+		} else {
+			if _, ok := interface{}(bean).(AfterInsertProcessor); ok {
+				session.afterUpdateBeans[bean] = nil
+			}
+		}
+	}
+	cleanupProcessorsClosures(&session.afterClosures) // cleanup after used
+	// --
+
+	return res.RowsAffected()
+}

statement.go

@@ -996,13 +996,14 @@ func (statement *Statement) Unscoped() *Statement {
 }
 
 func (statement *Statement) genColumnStr() string {
-
 	var buf bytes.Buffer
+	if statement.RefTable == nil {
+		return ""
+	}
 
 	columns := statement.RefTable.Columns()
 
 	for _, col := range columns {
-
 		if statement.OmitStr != "" {
 			if _, ok := getFlagForColumn(statement.columnMap, col); ok {
 				continue