数据库操作
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package dbquery
import (
"database/sql"
"log"
"errors"
"strings"
"time"
"git.tetele.net/tgo/helper"
_ "github.com/go-sql-driver/mysql"
)
var DB *sql.DB
func Connect(DBHOST, DBUSER, DBPWD, DBNAME, DBPORT string, conns ...int) error {
log.Println("database connectting...")
var dbConnErr error
if DBHOST != "" && DBUSER != "" && DBPWD != "" && DBPORT != "" { //&& DBNAME != ""
for i := 0; i < 10; i++ {
DB, dbConnErr = sql.Open("mysql", DBUSER+":"+DBPWD+"@tcp("+DBHOST+":"+DBPORT+")/"+DBNAME+"?charset=utf8")
if dbConnErr != nil {
log.Println("ERROR", "can not connect to Database, ", dbConnErr)
time.Sleep(time.Second * 5)
} else {
if len(conns) > 0 {
DB.SetMaxOpenConns(conns[0]) //用于设置最大打开的连接数,默认值为0表示不限制
} else {
DB.SetMaxOpenConns(200) //默认值为0表示不限制
}
if len(conns) > 1 {
DB.SetMaxIdleConns(conns[1]) //用于设置闲置的连接数
} else {
DB.SetMaxIdleConns(50)
}
DB.Ping()
log.Println("database connected")
DB.SetConnMaxLifetime(time.Minute * 2)
break
}
}
} else {
return errors.New("db connection params errors")
}
return dbConnErr
}
func CloseConn() error {
return DB.Close()
}
/**
* 检测表名
*/
func getTableName(dbName, table string, dbtype ...string) string {
var db_type string = "mysql"
if len(dbtype) > 0 {
if dbtype[0] != "" {
db_type = dbtype[0]
}
}
var ret string
switch db_type {
case "mysql":
if strings.Contains(table, ".") {
ret = table
}
if dbName != "" {
ret = helper.StringJoin(dbName, ".", table)
} else {
ret = table
}
case "mssql":
ret = helper.StringJoin(dbName, ".", table)
}
return ret
}
func GetDbTableName(dbName, table string) string {
return getTableName(dbName, table)
}
func judg() []string {
return []string{"=", ">", "<", "!=", "<=", ">="}
}