数据库操作
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package dbquery
/**
* 事务操作
*/
import (
"database/sql"
"errors"
"log"
"strconv"
"strings"
"git.tetele.net/tgo/helper"
)
type TxQuery struct {
dbname string
table string
alias string
title string
where []string
where_or []string
join [][]string //[["tablea as a","a.id=b.id","left"]]
data []string
value []interface{}
save_data []map[string]interface{} //批量操作的数据[["title":"a","num":1,],["title":"a","num":1,]]
upd_field []string // 批量更新时需要更新的字段,为空时按除id外的字段进行更新
orderby string
groupby string
having string
page int
page_size int
stmt *sql.Stmt
conn *sql.DB
tx *sql.Tx
debug bool
}
func NewTxQuery(t ...string) *TxQuery {
var conn_type *sql.DB = DB
if len(t) > 0 {
switch t[0] {
case "mysql":
conn_type = DB
case "mssql": //sql server
conn_type = MSDB_CONN
}
}
tx, err := conn_type.Begin()
if err != nil {
log.Println("start tx begin error", err)
}
return &TxQuery{
conn: conn_type,
tx: tx,
}
}
func (this *TxQuery) Conn(conn *sql.DB) *TxQuery {
this.conn = conn
return this
}
func (this *TxQuery) Db(dbname string) *TxQuery {
this.dbname = dbname
return this
}
func (this *TxQuery) Table(tablename string) *TxQuery {
this.table = tablename
return this
}
func (this *TxQuery) Alias(tablename string) *TxQuery {
this.alias = tablename
return this
}
func (this *TxQuery) Title(title string) *TxQuery {
this.title = title
return this
}
func (this *TxQuery) Page(page int) *TxQuery {
this.page = page
return this
}
func (this *TxQuery) PageSize(page_num int) *TxQuery {
this.page_size = page_num
return this
}
func (this *TxQuery) Orderby(orderby string) *TxQuery {
this.orderby = orderby
return this
}
func (this *TxQuery) Groupby(groupby string) *TxQuery {
this.groupby = groupby
return this
}
func (this *TxQuery) Having(having string) *TxQuery {
this.having = having
return this
}
func (this *TxQuery) Where(where string) *TxQuery {
this.where = append(this.where, where)
return this
}
func (this *TxQuery) Wheres(wheres []string) *TxQuery {
if len(wheres) > 0 {
this.where = append(this.where, wheres...)
}
return this
}
func (this *TxQuery) WhereOr(where string) *TxQuery {
this.where_or = append(this.where_or, where)
return this
}
func (this *TxQuery) Value(value interface{}) *TxQuery {
this.value = append(this.value, value)
return this
}
func (this *TxQuery) SaveData(value map[string]interface{}) *TxQuery {
this.save_data = append(this.save_data, value)
return this
}
func (this *TxQuery) SaveDatas(value []map[string]interface{}) *TxQuery {
this.save_data = append(this.save_data, value...)
return this
}
func (this *TxQuery) UpdField(value string) *TxQuery {
this.upd_field = append(this.upd_field, value)
return this
}
func (this *TxQuery) UpdFields(value []string) *TxQuery {
this.upd_field = append(this.upd_field, value...)
return this
}
func (this *TxQuery) Values(values []interface{}) *TxQuery {
this.value = append(this.value, values...)
return this
}
func (this *TxQuery) Join(join []string) *TxQuery {
this.join = append(this.join, join)
return this
}
func (this *TxQuery) Data(data string) *TxQuery {
this.data = append(this.data, data)
return this
}
func (this *TxQuery) Datas(datas []string) *TxQuery {
this.data = append(this.data, datas...)
return this
}
func (this *TxQuery) Debug(debug bool) *TxQuery {
this.debug = debug
return this
}
/*
* 清理上次查询
*/
func (this *TxQuery) Clean() *TxQuery {
this.title = ""
this.where = this.where[0:0]
this.where_or = this.where_or[0:0]
this.join = this.join[0:0]
this.data = this.data[0:0]
this.value = this.value[0:0]
this.orderby = ""
this.groupby = ""
this.page = 0
this.page_size = 0
this.save_data = this.save_data[0:0]
this.upd_field = this.upd_field[0:0]
this.having = ""
return this
}
//构造子查询
func (this *TxQuery) BuildSelectSql() (map[string]interface{}, error) {
if this.dbname == "" && this.table == "" {
return nil, errors.New("参数错误,没有数据表")
}
var table = ""
if strings.Contains(this.table, "select ") {
table = this.table
} else {
table = getTableName(this.dbname, this.table)
}
var sql, title string
if this.title != "" {
title = this.title
} else {
title = "*"
}
sql = helper.StringJoin("select ", title)
if this.alias != "" {
table = helper.StringJoin(table, " as ", this.alias)
}
sql = helper.StringJoin(sql, " from ", table)
if len(this.join) > 0 {
for _, joinitem := range this.join {
if len(joinitem) < 2 {
continue
}
if len(joinitem) == 3 {
sql = helper.StringJoin(sql, " ", joinitem[2], " join ", getTableName(this.dbname, joinitem[0]), " on ", joinitem[1])
} else { //默认左连接
sql = helper.StringJoin(sql, " left join ", getTableName(this.dbname, joinitem[0]), " on ", joinitem[1])
}
}
}
if len(this.where) > 0 || len(this.where_or) > 0 {
sql = helper.StringJoin(sql, " where ")
}
if len(this.where) > 0 {
sql = helper.StringJoin(sql, " (", strings.Join(this.where, " and "), " ) ")
}
if len(this.where_or) > 0 {
if len(this.where) > 0 {
sql = helper.StringJoin(sql, " or ", strings.Join(this.where_or, " or "))
} else {
sql = helper.StringJoin(sql, strings.Join(this.where_or, " or "))
}
}
if this.groupby != "" {
sql = helper.StringJoin(sql, " group by ", this.groupby)
}
if this.having != "" {
sql = helper.StringJoin(sql, " having ", this.having)
}
if this.orderby != "" {
sql = helper.StringJoin(sql, " order by ", this.orderby)
}
if this.page > 0 || this.page_size > 0 {
if this.page < 1 {
this.page = 1
}
if this.page_size < 1 {
this.page_size = 10
}
from := strconv.Itoa((this.page - 1) * this.page_size)
offset := strconv.Itoa(this.page_size)
if from != "" && offset != "" {
sql = helper.StringJoin(sql, " limit ", from, " , ", offset)
}
}
if this.debug {
log.Println("query sql:", sql, this.value)
}
condition_len := 0 //所有条件数
for _, ch2 := range sql {
if string(ch2) == "?" {
condition_len++
}
}
if condition_len != len(this.value) {
return nil, errors.New("参数错误,条件值错误")
}
return map[string]interface{}{
"sql": sql,
"value": this.value,
}, nil
}
// 拼查询sql
func (this *TxQuery) QueryStmt() error {
res := map[string]interface{}{}
res, err = this.BuildSelectSql()
if err != nil {
return err
}
sql := helper.ToStr(res["sql"])
stmt, err = this.tx.Prepare(sql + " FOR UPDATE")
if err != nil {
return err
}
this.stmt = stmt
return nil
}
// 拼更新sql
func (this *TxQuery) UpdateStmt() error {
if this.dbname == "" && this.table == "" {
return errors.New("参数错误,没有数据表")
}
if len(this.where) < 1 {
return errors.New("参数错误,缺少条件")
}
dbName := getTableName(this.dbname, this.table)
var sql string
sql = helper.StringJoin("update ", dbName, " set ", strings.Join(this.data, " , "))
sql = helper.StringJoin(sql, " where ", strings.Join(this.where, " and "))
if this.debug {
log.Println("update sql:", sql, this.value)
}
condition_len := 0 //所有条件数
for _, ch2 := range sql {
if string(ch2) == "?" {
condition_len++
}
}
if condition_len != len(this.value) {
return errors.New("参数错误,条件值错误")
}
stmt, err = this.tx.Prepare(sql)
if err != nil {
return err
}
this.stmt = stmt
return nil
}
// 拼批量存在更新不存在插入sql
func (this *TxQuery) UpdateAllStmt() error {
if this.dbname == "" && this.table == "" {
return errors.New("参数错误,没有数据表")
}
dbName := getTableName(this.dbname, this.table)
var sql string
var dataSql = []string{}
var valSql = []string{}
var updSql = []string{}
var updFieldLen = len(this.upd_field)
if len(this.save_data) > 0 {
this.data = []string{}
this.value = []interface{}{}
for i, datum := range this.save_data {
if i == 0 {
for k, _ := range datum {
this.data = append(this.data, k)
dataSql = append(dataSql, "?")
if updFieldLen == 0 && k != "id" {
updSql = append(updSql, k+"=values("+k+")")
}
}
if updFieldLen > 0 {
for _, k := range this.upd_field {
updSql = append(updSql, k+"=values("+k+")")
}
}
}
for _, k := range this.data {
this.value = append(this.value, datum[k])
}
valSql = append(valSql, "("+strings.Join(dataSql, " , ")+")")
}
} else {
for _, datum := range this.data {
dataSql = append(dataSql, "?")
if updFieldLen == 0 && datum != "id" {
updSql = append(updSql, datum+"=values("+datum+")")
}
}
if updFieldLen > 0 {
for _, k := range this.upd_field {
updSql = append(updSql, k+"=values("+k+")")
}
}
valSql = append(valSql, "("+strings.Join(dataSql, " , ")+")")
}
if len(this.data) == 0 {
return errors.New("参数错误,没有数据表")
}
if len(this.value) == 0 {
return errors.New("参数错误,条件值错误")
}
setText := " values "
if len(valSql) > 1 {
setText = " value "
}
sql = helper.StringJoin("insert into ", dbName, " (", strings.Join(this.data, " , "), ")", setText, strings.Join(valSql, ","))
if len(this.value) == 0 {
return errors.New("参数错误,条件值错误")
}
if this.debug {
log.Println("insert on duplicate key update sql:", sql, this.value)
}
stmt, err = this.tx.Prepare(sql)
if err != nil {
return err
}
this.stmt = stmt
return nil
}
// 拼插入sql
func (this *TxQuery) CreateStmt() error {
if this.dbname == "" && this.table == "" {
return errors.New("参数错误,没有数据表")
}
dbName := getTableName(this.dbname, this.table)
var sql string
sql = helper.StringJoin("insert into ", dbName, " set ", strings.Join(this.data, " , "))
if this.debug {
log.Println("insert sql:", sql, this.value)
}
condition_len := 0 //所有条件数
for _, ch2 := range sql {
if string(ch2) == "?" {
condition_len++
}
}
if condition_len != len(this.value) {
return errors.New("参数错误,条件值错误")
}
stmt, err = this.tx.Prepare(sql)
if err != nil {
return err
}
this.stmt = stmt
return nil
}
// 拼批量插入sql
func (this *TxQuery) CreateAllStmt() error {
if this.dbname == "" && this.table == "" {
return errors.New("参数错误,没有数据表")
}
dbName := getTableName(this.dbname, this.table)
var sql string
var dataSql = []string{}
var valSql = []string{}
if len(this.save_data) > 0 {
this.data = []string{}
this.value = []interface{}{}
for i, datum := range this.save_data {
if i == 0 {
for k, _ := range datum {
this.data = append(this.data, k)
dataSql = append(dataSql, "?")
}
}
for _, k := range this.data {
this.value = append(this.value, datum[k])
}
valSql = append(valSql, "("+strings.Join(dataSql, " , ")+")")
}
} else {
for i := 0; i < len(this.data); i++ {
dataSql = append(dataSql, "?")
}
valSql = append(valSql, "("+strings.Join(dataSql, " , ")+")")
}
if len(this.data) == 0 {
return errors.New("参数错误,没有数据表")
}
if len(this.value) == 0 {
return errors.New("参数错误,条件值错误")
}
setText := " values "
if len(valSql) > 1 {
setText = " value "
}
sql = helper.StringJoin("insert into ", dbName, " (", strings.Join(this.data, " , "), ")", setText, strings.Join(valSql, ","))
if len(this.value) == 0 {
return errors.New("参数错误,条件值错误")
}
if this.debug {
log.Println("insert sql:", sql, this.value)
}
stmt, err = this.tx.Prepare(sql)
if err != nil {
return err
}
this.stmt = stmt
return nil
}
// 拼删除sql
func (this *TxQuery) DeleteStmt() error {
if this.dbname == "" && this.table == "" {
return errors.New("参数错误,没有数据表")
}
if len(this.where) < 1 {
return errors.New("参数错误,缺少条件")
}
dbName := getTableName(this.dbname, this.table)
var sql string
sql = helper.StringJoin("delete from ", dbName, " where ", strings.Join(this.where, " and "))
if this.page_size > 0 {
sql = helper.StringJoin(sql, " limit ", strconv.Itoa(this.page_size))
}
if this.debug {
log.Println("delete sql:", sql, this.value)
}
condition_len := 0 //所有条件数
for _, ch2 := range sql {
if string(ch2) == "?" {
condition_len++
}
}
if condition_len != len(this.value) {
return errors.New("参数错误,条件值错误")
}
stmt, err = this.tx.Prepare(sql)
if err != nil {
return err
}
this.stmt = stmt
return nil
}
/**
* 执行查询列表
* return list error
*/
func (this *TxQuery) Select() ([]map[string]string, error) {
err := this.QueryStmt()
if err != nil {
return []map[string]string{}, err
}
if this.stmt == nil {
return []map[string]string{}, errors.New("缺少必要参数")
}
return StmtForQueryList(this.stmt, this.value)
}
/**
* 执行查询一条数据
* return row error
*/
func (this *TxQuery) Find() (map[string]string, error) {
this.page = 1
this.page_size = 1
err := this.QueryStmt()
if err != nil {
return map[string]string{}, err
}
if this.stmt == nil {
return nil, errors.New("缺少必要参数")
}
return StmtForQueryRow(this.stmt, this.value)
}
/**
* 执行更新
* return is_updated error
*/
func (this *TxQuery) Update() (int64, error) {
err := this.UpdateStmt()
if err != nil {
return 0, err
}
return StmtForUpdateExec(this.stmt, this.value)
}
//批量更新
func (this *TxQuery) UpdateAll() (int64, error) {
err := this.UpdateAllStmt()
if err != nil {
return 0, err
}
return StmtForUpdateExec(this.stmt, this.value)
}
/**
* 执行删除
* return is_delete error
*/
func (this *TxQuery) Delete() (int64, error) {
err := this.DeleteStmt()
if err != nil {
return 0, err
}
return StmtForUpdateExec(this.stmt, this.value)
}
/**
* 执行写入
* return is_insert error
*/
func (this *TxQuery) Create() (int64, error) {
err := this.CreateStmt()
if err != nil {
return 0, err
}
return StmtForInsertExec(this.stmt, this.value)
}
/**
* 执行批量写入
* return is_insert error
*/
func (this *TxQuery) CreateAll() (int64, error) {
err := this.CreateAllStmt()
if err != nil {
return 0, err
}
return StmtForInsertExec(this.stmt, this.value)
}
/**
* 提交
*/
func (this *TxQuery) Commit() error {
return this.tx.Commit()
}
/**
* 回滚
*/
func (this *TxQuery) Rollback() error {
return this.tx.Rollback()
}