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// 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"
"fmt"
"strings"
"github.com/go-xorm/core"
)
// Ping test if database is ok
func (session *Session) Ping() error {
if session.isAutoClose {
defer session.Close()
}
session.engine.logger.Infof("PING DATABASE %v", session.engine.DriverName())
return session.DB().Ping()
}
// CreateTable create a table according a bean
func (session *Session) CreateTable(bean interface{}) error {
if session.isAutoClose {
defer session.Close()
}
return session.createTable(bean)
}
func (session *Session) createTable(bean interface{}) error {
if err := session.statement.setRefBean(bean); err != nil {
return err
}
sqlStr := session.statement.genCreateTableSQL()
_, err := session.exec(sqlStr)
return err
}
// CreateIndexes create indexes
func (session *Session) CreateIndexes(bean interface{}) error {
if session.isAutoClose {
defer session.Close()
}
return session.createIndexes(bean)
}
func (session *Session) createIndexes(bean interface{}) error {
if err := session.statement.setRefBean(bean); err != nil {
return err
}
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 {
if session.isAutoClose {
defer session.Close()
}
return session.createUniques(bean)
}
func (session *Session) createUniques(bean interface{}) error {
if err := session.statement.setRefBean(bean); err != nil {
return err
}
sqls := session.statement.genUniqueSQL()
for _, sqlStr := range sqls {
_, err := session.exec(sqlStr)
if err != nil {
return err
}
}
return nil
}
// DropIndexes drop indexes
func (session *Session) DropIndexes(bean interface{}) error {
if session.isAutoClose {
defer session.Close()
}
return session.dropIndexes(bean)
}
func (session *Session) dropIndexes(bean interface{}) error {
if err := session.statement.setRefBean(bean); err != nil {
return err
}
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 {
if session.isAutoClose {
defer session.Close()
}
return session.dropTable(beanOrTableName)
}
func (session *Session) dropTable(beanOrTableName interface{}) error {
tableName := session.engine.TableName(beanOrTableName)
var needDrop = true
if !session.engine.dialect.SupportDropIfExists() {
sqlStr, args := session.engine.dialect.TableCheckSql(tableName)
results, err := session.queryBytes(sqlStr, args...)
if err != nil {
return err
}
needDrop = len(results) > 0
}
if needDrop {
sqlStr := session.engine.Dialect().DropTableSql(session.engine.TableName(tableName, true))
_, err := session.exec(sqlStr)
return err
}
return nil
}
// IsTableExist if a table is exist
func (session *Session) IsTableExist(beanOrTableName interface{}) (bool, error) {
if session.isAutoClose {
defer session.Close()
}
tableName := session.engine.TableName(beanOrTableName)
return session.isTableExist(tableName)
}
func (session *Session) isTableExist(tableName string) (bool, error) {
sqlStr, args := session.engine.dialect.TableCheckSql(tableName)
results, err := session.queryBytes(sqlStr, args...)
return len(results) > 0, err
}
// IsTableEmpty if table have any records
func (session *Session) IsTableEmpty(bean interface{}) (bool, error) {
if session.isAutoClose {
defer session.Close()
}
return session.isTableEmpty(session.engine.TableName(bean))
}
func (session *Session) isTableEmpty(tableName string) (bool, error) {
var total int64
sqlStr := fmt.Sprintf("select count(*) from %s", session.engine.Quote(session.engine.TableName(tableName, true)))
err := session.queryRow(sqlStr).Scan(&total)
if err != nil {
if err == sql.ErrNoRows {
err = nil
}
return true, err
}
return total == 0, nil
}
// find if index is exist according cols
func (session *Session) isIndexExist2(tableName string, cols []string, unique bool) (bool, error) {
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 {
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 {
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 {
index := session.statement.RefTable.Indexes[uqeName]
sqlStr := session.engine.dialect.CreateIndexSql(tableName, index)
_, err := session.exec(sqlStr)
return err
}
// Sync2 synchronize structs to database tables
func (session *Session) Sync2(beans ...interface{}) error {
engine := session.engine
if session.isAutoClose {
session.isAutoClose = false
defer session.Close()
}
tables, err := engine.DBMetas()
if err != nil {
return err
}
session.autoResetStatement = false
defer func() {
session.autoResetStatement = true
session.resetStatement()
}()
var structTables []*core.Table
for _, bean := range beans {
v := rValue(bean)
table, err := engine.mapType(v)
if err != nil {
return err
}
structTables = append(structTables, table)
tbName := engine.TableName(bean)
tbNameWithSchema := engine.TableName(tbName, true)
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",
tbNameWithSchema, col.Name, curType, expectedType)
_, err = session.exec(engine.dialect.ModifyColumnSql(tbNameWithSchema, col))
} else {
engine.logger.Warnf("Table %s column %s db type is %s, struct type is %s\n",
tbNameWithSchema, 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",
tbNameWithSchema, col.Name, oriCol.Length, col.Length)
_, err = session.exec(engine.dialect.ModifyColumnSql(tbNameWithSchema, 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",
tbNameWithSchema, 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",
tbNameWithSchema, col.Name, oriCol.Length, col.Length)
_, err = session.exec(engine.dialect.ModifyColumnSql(tbNameWithSchema, 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.statement.RefTable = table
session.statement.tableName = tbNameWithSchema
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(tbNameWithSchema, oriIndex)
_, err = session.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(tbNameWithSchema, index2)
_, err = session.exec(sql)
if err != nil {
return err
}
}
}
for name, index := range addedNames {
if index.Type == core.UniqueType {
session.statement.RefTable = table
session.statement.tableName = tbNameWithSchema
err = session.addUnique(tbNameWithSchema, name)
} else if index.Type == core.IndexType {
session.statement.RefTable = table
session.statement.tableName = tbNameWithSchema
err = session.addIndex(tbNameWithSchema, 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", engine.TableName(table.Name, true), colName)
}
}
}
return nil
}