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