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