package dbquery import ( "database/sql" "errors" "log" "strconv" "strings" "git.tetele.net/tgo/helper" ) var stmt *sql.Stmt var err error type Query 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{} orderby string page int page_size int stmt *sql.Stmt conn *sql.DB debug bool dbtype string } func NewQuery(t ...string) *Query { var conn_type *sql.DB = DB var db_type string = "mysql" if len(t) > 0 { switch t[0] { case "mysql": conn_type = DB db_type = "mysql" case "mssql": //sql server conn_type = MSDB_CONN db_type = "mssql" } } return &Query{ conn: conn_type, dbtype: db_type, } } func (this *Query) Conn(conn *sql.DB) *Query { this.conn = conn return this } func (this *Query) Db(dbname string) *Query { this.dbname = dbname return this } func (this *Query) Table(tablename string) *Query { this.table = tablename return this } func (this *Query) Alias(tablename string) *Query { this.alias = tablename return this } func (this *Query) Title(title string) *Query { this.title = title return this } func (this *Query) Page(page int) *Query { this.page = page return this } func (this *Query) PageSize(page_num int) *Query { this.page_size = page_num return this } func (this *Query) Orderby(orderby string) *Query { this.orderby = orderby return this } func (this *Query) Where(where string) *Query { this.where = append(this.where, where) return this } func (this *Query) Wheres(wheres []string) *Query { if len(wheres) > 0 { this.where = append(this.where, wheres...) } return this } func (this *Query) WhereOr(where string) *Query { this.where_or = append(this.where_or, where) return this } func (this *Query) Value(value interface{}) *Query { this.value = append(this.value, value) return this } func (this *Query) Values(values []interface{}) *Query { this.value = append(this.value, values...) return this } func (this *Query) Join(join []string) *Query { this.join = append(this.join, join) return this } func (this *Query) Data(data string) *Query { this.data = append(this.data, data) return this } func (this *Query) Datas(datas []string) *Query { this.data = append(this.data, datas...) return this } func (this *Query) Debug(debug bool) *Query { this.debug = debug return this } /* * 清理上次查询 */ func (this *Query) Clean() *Query { 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.page = 0 this.page_size = 0 return this } // 拼查询sql func (this *Query) QueryStmt() error { if this.dbname == "" && this.table == "" { return errors.New("参数错误,没有数据表") } table := getTableName(this.dbname, this.table, this.dbtype) // var err error 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], this.dbtype), " on ", joinitem[1]) } else { //默认左连接 sql = helper.StringJoin(sql, " left join ", getTableName(this.dbname, joinitem[0], this.dbtype), " 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.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 errors.New("参数错误,条件值错误") } if this.conn == nil { this.conn = DB } stmt, err = this.conn.Prepare(sql) if err != nil { return err } this.stmt = stmt return nil } // 拼更新sql func (this *Query) 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, this.dbtype) 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") } if this.conn == nil { this.conn = DB } stmt, err = this.conn.Prepare(sql) if err != nil { return err } this.stmt = stmt return nil } // 拼插入sql func (this *Query) 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, this.dbtype) 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") } if this.conn == nil { this.conn = DB } stmt, err = this.conn.Prepare(sql) if err != nil { return err } this.stmt = stmt return nil } // 拼删除sql func (this *Query) 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, this.dbtype) 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") } if this.conn == nil { this.conn = DB } stmt, err = this.conn.Prepare(sql) if err != nil { return err } this.stmt = stmt return nil } /** * 执行查询列表 * return list error */ func (this *Query) 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 *Query) 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 *Query) Update() (int64, error) { err := this.UpdateStmt() if err != nil { return 0, err } return StmtForUpdateExec(this.stmt, this.value) } /** * 执行删除 * return is_delete error */ func (this *Query) 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 *Query) Create() (int64, error) { err := this.CreateStmt() if err != nil { return 0, err } return StmtForInsertExec(this.stmt, this.value) }