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basesql.go
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basesql.go
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package basesql
import (
"bytes"
"database/sql"
"errors"
"fmt"
"github.com/jmoiron/sqlx"
_ "github.com/mattn/go-sqlite3"
"github.com/toolglobal/api/database"
"go.uber.org/zap"
"path"
)
// Basesql sql-like database
// is not goroutine-safe
type Basesql struct {
conn *sqlx.DB
tx *sqlx.Tx
logger *zap.Logger
}
// Init initialization
// init db connection
// create tables if not exist
func (bs *Basesql) Init(dbname string, dbpath string, logger *zap.Logger) error {
conn, err := sqlx.Connect(database.DBTypeSQLite3, path.Join(dbpath, dbname))
if err != nil {
return err
}
bs.conn = conn
if _, err = bs.conn.Exec("PRAGMA journal_mode = WAL;"); err != nil {
logger.Error("Init DB Set journal_mode", zap.Error(err))
}
if _, err = bs.conn.Exec("PRAGMA cache_size = 8000;"); err != nil {
logger.Error("Init DB Set cachesize", zap.Error(err))
}
if _, err = bs.conn.Exec("PRAGMA synchronous = OFF;"); err != nil {
logger.Error("Init DB Set synchronous", zap.Error(err))
}
if _, err = bs.conn.Exec("PRAGMA temp_store = MEMORY;"); err != nil {
logger.Error("Init DB Set temp_store", zap.Error(err))
}
bs.logger = logger
return nil
}
// Close close conn
func (bs *Basesql) Close() {
if bs.tx != nil {
bs.tx.Rollback()
bs.tx = nil
}
if bs.conn != nil {
bs.conn.Close()
bs.conn = nil
}
}
// PrepareTables create tables if not exists
func (bs *Basesql) PrepareTables(ctsqls, cisqls []string) error {
for _, ctsql := range ctsqls {
_, err := bs.conn.Exec(ctsql)
if err != nil {
return err
}
}
for _, cisql := range cisqls {
_, err := bs.conn.Exec(cisql)
if err != nil {
// index may already exists, so just warn here
bs.logger.Warn("create sql index failed:" + err.Error())
}
}
return nil
}
func (bs *Basesql) Excute(stmt *sql.Stmt, fields []database.Feild) (sql.Result, error) {
values := make([]interface{}, len(fields))
for i, v := range fields {
values[i] = v.Value
}
return stmt.Exec(values...)
}
func (bs *Basesql) Prepare(table string, fields []database.Feild) (*sql.Stmt, error) {
var sqlBuff bytes.Buffer
sqlBuff.WriteString(fmt.Sprintf("insert into %s (", table))
for i := 0; i < len(fields)-1; i++ {
sqlBuff.WriteString(fmt.Sprintf("%s,", fields[i].Name))
}
sqlBuff.WriteString(fmt.Sprintf("%s) values (", fields[len(fields)-1].Name))
for i := 1; i < len(fields); i++ {
sqlBuff.WriteString(fmt.Sprintf("?,"))
}
sqlBuff.WriteString(fmt.Sprintf("?);"))
if bs.tx != nil {
return bs.tx.Prepare(sqlBuff.String())
} else {
return bs.conn.Prepare(sqlBuff.String())
}
}
// Insert insert a record
func (bs *Basesql) Insert(table string, fields []database.Feild) (sql.Result, error) {
if table == "" || len(fields) == 0 {
return nil, errors.New("nothing to insert")
}
var sqlBuff bytes.Buffer
// fill field name
sqlBuff.WriteString(fmt.Sprintf("insert into %s (", table))
for i := 0; i < len(fields)-1; i++ {
sqlBuff.WriteString(fmt.Sprintf("%s,", fields[i].Name))
}
sqlBuff.WriteString(fmt.Sprintf("%s) values (", fields[len(fields)-1].Name))
// fill field value
for i := 0; i < len(fields)-1; i++ {
sqlBuff.WriteString("?,")
}
sqlBuff.WriteString("?);")
// execute
values := make([]interface{}, len(fields))
for i, v := range fields {
values[i] = v.Value
}
var res sql.Result
var err error
//log.Println("Insert", sqlBuff.String(), values)
if bs.tx != nil {
res, err = bs.tx.Exec(sqlBuff.String(), values...)
} else {
res, err = bs.conn.Exec(sqlBuff.String(), values...)
}
return res, err
}
// Delete delete records
func (bs *Basesql) Delete(table string, where []database.Where) (sql.Result, error) {
if table == "" {
return nil, errors.New("table name is required")
}
if len(where) == 0 {
return nil, errors.New("table-clearing is not allowed")
}
var sqlBuff bytes.Buffer
sqlBuff.WriteString(fmt.Sprintf("delete from %s where 1 = 1", table))
for i := 0; i < len(where); i++ {
sqlBuff.WriteString(fmt.Sprintf(" and %s %s ? ", where[i].Name, where[i].GetOp()))
}
// execute
values := make([]interface{}, len(where))
for i, v := range where {
values[i] = v.Value
}
var res sql.Result
var err error
if bs.tx != nil {
res, err = bs.tx.Exec(sqlBuff.String(), values...)
} else {
res, err = bs.conn.Exec(sqlBuff.String(), values...)
}
return res, err
}
// Update update records
func (bs *Basesql) Update(table string, toupdate []database.Feild, where []database.Where) (sql.Result, error) {
if table == "" {
return nil, errors.New("table name is required")
}
if len(where) == 0 {
return nil, errors.New("full-table-update is not allowed")
}
if len(toupdate) == 0 {
return nil, errors.New("to-update-nothing is not allowed")
}
var sqlBuff bytes.Buffer
sqlBuff.WriteString(fmt.Sprintf(" update %s set %s = ? ", table, toupdate[0].Name))
for i := 1; i < len(toupdate); i++ {
sqlBuff.WriteString(fmt.Sprintf(", %s = ? ", toupdate[i].Name))
}
sqlBuff.WriteString(fmt.Sprintf(" where 1 = 1 "))
for i := 0; i < len(where); i++ {
sqlBuff.WriteString(fmt.Sprintf(" and %s %s ? ", where[i].Name, where[i].GetOp()))
}
// execute
values := make([]interface{}, len(toupdate)+len(where))
for i, v := range toupdate {
values[i] = v.Value
}
for i, v := range where {
values[len(toupdate)+i] = v.Value
}
//log.Println("Update ", sqlBuff.String(), values)
var res sql.Result
var err error
if bs.tx != nil {
res, err = bs.tx.Exec(sqlBuff.String(), values...)
} else {
res, err = bs.conn.Exec(sqlBuff.String(), values...)
}
return res, err
}
func (bs *Basesql) SelectRowsUnion(table string, wheres [][]database.Where, order *database.Order, paging *database.Paging, result interface{}) error {
if table == "" {
return errors.New("table name is required")
}
if len(wheres) == 0 {
return errors.New("full-table-select is not allowed")
}
if order != nil && (len(order.Feilds) == 0 || order.Type == "") {
return errors.New("order type and fields is required")
}
var values []interface{}
wheresLen := len(wheres)
var sqlBuff bytes.Buffer
for _, where := range wheres {
wheresLen--
for _, v := range where {
values = append(values, v.Value)
}
sqlBuff.WriteString(fmt.Sprintf("select * from %s where 1 = 1", table))
for i := 0; i < len(where); i++ {
sqlBuff.WriteString(fmt.Sprintf(" and %s %s ? ", where[i].Name, where[i].GetOp()))
}
if wheresLen > 0 {
sqlBuff.WriteString(" union ")
}
}
if order != nil {
// append order by clause for ordering
sqlBuff.WriteString(fmt.Sprintf(" order by %s ", order.Feilds[0]))
for i := 1; i < len(order.Feilds); i++ {
sqlBuff.WriteString(fmt.Sprintf(" , %s ", order.Feilds[i]))
}
sqlBuff.WriteString(order.Type)
sqlBuff.WriteString(fmt.Sprintf(" limit %d offset %d ", paging.Limit, paging.CursorValue))
}
//log.Println("SelectRowsUnion ", sqlBuff.String(), values)
// execute
var err error
if bs.tx != nil {
err = bs.tx.Select(result, sqlBuff.String(), values...)
} else {
err = bs.conn.Select(result, sqlBuff.String(), values...)
}
return err
}
// SelectRows select rows to struct slice
func (bs *Basesql) SelectRows(table string, where []database.Where, order *database.Order, paging *database.Paging, result interface{}) error {
if table == "" {
return errors.New("table name is required")
}
if len(where) == 0 {
return errors.New("full-table-select is not allowed")
}
if order != nil && (len(order.Feilds) == 0 || order.Type == "") {
return errors.New("order type and fields is required")
}
values := make([]interface{}, len(where))
for i, v := range where {
values[i] = v.Value
}
var sqlBuff bytes.Buffer
sqlBuff.WriteString(fmt.Sprintf("select * from %s where 1 = 1", table))
for i := 0; i < len(where); i++ {
sqlBuff.WriteString(fmt.Sprintf(" and %s %s ? ", where[i].Name, where[i].GetOp()))
}
if order != nil {
// append where clause for paging
// if paging != nil && paging.CursorValue != 0 {
// sqlBuff.WriteString(fmt.Sprintf(" and %s %s ? ", paging.CursorName, order.GetOp()))
// values = append(values, paging.CursorValue)
// }
// append order by clause for ordering
sqlBuff.WriteString(fmt.Sprintf(" order by %s ", order.Feilds[0]))
for i := 1; i < len(order.Feilds); i++ {
sqlBuff.WriteString(fmt.Sprintf(" , %s ", order.Feilds[i]))
}
sqlBuff.WriteString(order.Type)
// append limit clause for paging
if paging != nil {
//sqlBuff.WriteString(" limit ? ")
//values = append(values, paging.Limit)
sqlBuff.WriteString(fmt.Sprintf(" limit %d offset %d ", paging.Limit, paging.CursorValue))
}
}
//log.Println("SelectRows ", sqlBuff.String(), values)
// execute
var err error
if bs.tx != nil {
err = bs.tx.Select(result, sqlBuff.String(), values...)
} else {
err = bs.conn.Select(result, sqlBuff.String(), values...)
}
return err
}
// SelectRowsOffset select rows to struct slice
func (bs *Basesql) SelectRowsOffset(table string, where []database.Where, order *database.Order, offset, limit uint64, result interface{}) error {
if table == "" {
return errors.New("table name is required")
}
if len(where) == 0 {
return errors.New("full-table-select is not allowed")
}
if order != nil && (len(order.Feilds) == 0 || order.Type == "") {
return errors.New("order type and fields is required")
}
values := make([]interface{}, len(where))
for i, v := range where {
values[i] = v.Value
}
var sqlBuff bytes.Buffer
sqlBuff.WriteString(fmt.Sprintf("select * from %s where 1 = 1", table))
for i := 0; i < len(where); i++ {
sqlBuff.WriteString(fmt.Sprintf(" and %s %s ? ", where[i].Name, where[i].GetOp()))
}
if order != nil {
// append order by clause for ordering
sqlBuff.WriteString(fmt.Sprintf(" order by %s ", order.Feilds[0]))
for i := 1; i < len(order.Feilds); i++ {
sqlBuff.WriteString(fmt.Sprintf(" , %s ", order.Feilds[i]))
}
sqlBuff.WriteString(order.Type)
// append limit clause for paging
sqlBuff.WriteString(fmt.Sprintf(" limit %d offset %d ", limit, offset))
}
//log.Println("SelectRowsOffset ", sqlBuff.String(), values)
// execute
var err error
if bs.tx != nil {
err = bs.tx.Select(result, sqlBuff.String(), values...)
} else {
err = bs.conn.Select(result, sqlBuff.String(), values...)
}
return err
}
// SelectRawSQL query useing raw sql
func (bs *Basesql) SelectRawSQL(table string, sqlStr string, values []interface{}, result interface{}) error {
if table == "" {
return errors.New("table name is required")
}
//log.Println("selectRawSQL ", sqlStr, values)
//
var err error
if bs.tx != nil {
err = bs.tx.Select(result, sqlStr, values...)
} else {
err = bs.conn.Select(result, sqlStr, values...)
}
return err
}
// Begin begin a new transaction
func (bs *Basesql) Begin() error {
tx, err := bs.conn.Beginx()
if err != nil {
return err
}
bs.tx = tx
return nil
}
// Commit commit current transaction
func (bs *Basesql) Commit() error {
if bs.tx != nil {
err := bs.tx.Commit()
if err != nil {
bs.tx = nil // ???
return err
}
}
bs.tx = nil
return nil
}
// Rollback rollback current transaction
func (bs *Basesql) Rollback() error {
if bs.tx != nil {
err := bs.tx.Rollback()
if err != nil {
return err
}
}
bs.tx = nil
return nil
}