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301 lines
6.8 KiB
301 lines
6.8 KiB
/**
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* DB transaction
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*/
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package dbquery
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import (
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"database/sql"
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"errors"
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"log"
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"strings"
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"time"
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)
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/**
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* 创建数据
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*/
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func TxInsert(tx *sql.Tx, dbname, table string, data map[string]string) (int64, error) {
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var insertId int64
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var err error
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if dbname == "" && table == "" {
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return 0, errors.New("参数错误，没有数据表")
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}
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dbName := getTableName(dbname, table)
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if len(data) < 1 {
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return 0, errors.New("参数错误，没有要写入的数据")
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}
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keyList := make([]string, len(data))
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keyStr := make([]string, len(data))
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valueList := make([]interface{}, len(data))
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var i int = 0
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for key, value := range data {
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keyList[i] = key
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keyStr[i] = "?"
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valueList[i] = value
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i++
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}
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result, err := tx.Exec("insert into "+dbName+" ("+strings.Join(keyList, ",")+") value("+strings.Join(keyStr, ",")+")", valueList...)
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if err != nil {
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log.Println("ERROR", "insert into ", dbName, "error:", err)
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return insertId, err
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} else {
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insertId, _ = result.LastInsertId()
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time.Sleep(time.Second * 2)
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return insertId, nil
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}
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}
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/**
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* 准备写入
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* return Stmt error
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*/
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func TxPreInsert(tx *sql.Tx, dbname, table string, data map[string]interface{}) (int64, error) {
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if dbname == "" && table == "" {
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return 0, errors.New("params error,no db or table")
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}
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dbName := getTableName(dbname, table)
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if len(data) < 1 {
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return 0, errors.New("params error,no data to insert")
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}
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var err error
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var stmt *sql.Stmt
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var field []string = make([]string, len(data))
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var valuelist []interface{} = make([]interface{}, len(data))
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var i int = 0
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for key, item := range data {
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field[i] = key + "=?"
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valuelist[i] = item
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i++
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}
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sql := "insert into " + dbName + " set " + strings.Join(field, " , ")
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stmt, err = tx.Prepare(sql)
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if err != nil {
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log.Println("insert prepare error:", sql, err)
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return 0, errors.New("insert prepare error：" + err.Error())
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}
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result, err := stmt.Exec(valuelist...)
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if err != nil {
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log.Println("insert exec error：", sql, valuelist, err)
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return 0, errors.New("insert exec error：" + err.Error())
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}
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insertId, _ := result.LastInsertId()
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return insertId, nil
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}
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/**
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* 修改数据
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*/
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func TxUpdate(tx *sql.Tx, dbname, table string, data map[string]string, where map[string]string) (int64, error) {
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var rowsAffected int64
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var err error
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if dbname == "" && table == "" {
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return rowsAffected, errors.New("参数错误，没有数据表")
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}
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dbName := getTableName(dbname, table)
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if len(data) < 1 {
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return rowsAffected, errors.New("参数错误，没有要写入的数据")
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}
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if len(where) < 1 {
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return rowsAffected, errors.New("参数错误，没有修改条件")
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}
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keyList := make([]string, len(data))
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valueList := make([]interface{}, len(data), len(data)+len(where))
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whereStr := make([]string, len(where))
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var i int = 0
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empty := false
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for key, value := range data {
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keyList[i] = key + "=?"
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valueList[i] = value
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i++
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}
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i = 0
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for key, value := range where {
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if value == "" {
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empty = true
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break
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}
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whereStr[i] = key + "=?"
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valueList = append(valueList, value)
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i++
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}
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if empty {
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log.Println("ERROR", "update", dbName, "error, params empty")
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return rowsAffected, errors.New("params empty")
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}
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result, err := tx.Exec("update "+dbName+" set "+strings.Join(keyList, " , ")+" where "+strings.Join(whereStr, " and "), valueList...)
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if err != nil {
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log.Println("ERROR", "update", dbName, "error:", err)
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return rowsAffected, err
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} else {
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rowsAffected, _ = result.RowsAffected()
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return rowsAffected, nil
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}
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}
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/**
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* 准备更新
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* return Stmt error
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*/
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func TxPreUpdate(tx *sql.Tx, dbname, table string, data []string, where []string, valuelist []interface{}) (int64, error) {
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if dbname == "" && table == "" {
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return 0, errors.New("params error,no db or table")
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}
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dbName := getTableName(dbname, table)
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if len(where) < 1 {
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return 0, errors.New("params error, no data for update")
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}
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var err error
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var stmt *sql.Stmt
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sql := "update " + dbName + " set " + strings.Join(data, " , ") + " where " + strings.Join(where, " and ")
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stmt, err = tx.Prepare(sql)
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if err != nil {
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log.Println("update prepare error:", sql, err)
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return 0, errors.New("update prepare error：" + err.Error())
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}
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res, err := stmt.Exec(valuelist...)
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if err != nil {
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log.Println("update exec error：", sql, valuelist, err)
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return 0, errors.New("update exec error:" + err.Error())
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}
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return res.RowsAffected()
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}
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/**
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* 删除数据
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* @param count 删除数量
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*/
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func TxDelete(tx *sql.Tx, dbname, table string, where map[string]string, del_count ...string) (int64, error) {
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var count int64
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var err error
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if dbname == "" && table == "" {
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return count, errors.New("参数错误，没有数据表")
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}
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dbName := getTableName(dbname, table)
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if len(where) < 1 {
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return count, errors.New("参数错误，没有删除条件")
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}
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keyList := make([]string, len(where))
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valueList := make([]interface{}, len(where))
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var i int = 0
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empty := false
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for key, value := range where {
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if value == "" {
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empty = true
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break
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}
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keyList[i] = key + "=?"
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valueList[i] = value
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i++
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}
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if empty {
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log.Println("ERROR", "delete from", dbName, "error, where：", where)
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return count, errors.New("params empty")
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}
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var limitStr string = ""
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if len(del_count) > 0 {
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limitStr = " limit " + del_count[0]
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}
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result, err := tx.Exec("delete from "+dbName+" where "+strings.Join(keyList, " and ")+limitStr, valueList...)
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if err != nil {
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log.Println("ERROR", "delete from", dbName, "error:", err)
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return count, err
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} else {
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count, _ = result.RowsAffected()
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return count, nil
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}
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}
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/**
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* 准备查询
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* return Stmt error
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*/
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func TxForRead(tx *sql.Tx, dbName, table string, title string, where []string) (*sql.Stmt, error) {
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if dbName == "" && table == "" {
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return nil, errors.New("参数错误，没有数据表")
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}
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dbName = getTableName(dbName, table)
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if len(title) < 1 {
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return nil, errors.New("没有要查询内容")
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}
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var stmt *sql.Stmt
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var err error
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if len(where) > 0 {
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// log.Println("SELECT " + title + " FROM " + dbName + " where " + strings.Join(where, " and ") + " FOR UPDATE")
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stmt, err = tx.Prepare("SELECT " + title + " FROM " + dbName + " where " + strings.Join(where, " and ") + " FOR UPDATE")
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} else {
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// log.Println("SELECT " + title + " FROM " + dbName + " FOR UPDATE")
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stmt, err = tx.Prepare("SELECT " + title + " FROM " + dbName + " FOR UPDATE")
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}
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return stmt, err
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}
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/**
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* 使用db prepare方式查询单条数据
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* @param dbName
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* @param title 查询的字段名
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* @param where 查询条件
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* @param valuelist 查询的条件值
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* @param limit 查询排序
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* GZ
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* 2020/05/19
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*/
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func TxGetData(tx *sql.Tx, dbName string, table string, title string, where []string, valuelist []interface{}) (map[string]string, error) {
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stmt, err := TxForRead(tx, dbName, table, title, where)
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if err != nil {
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return nil, err
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}
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defer stmt.Close()
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return StmtForQueryRow(stmt, valuelist)
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}
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