作者：mosasir
项目：go-sql-prox
func (conn *Conn) Begin() (driver.Tx, error) {
var err error
var ctx interface{}
var tx driver.Tx
if h := conn.Proxy.Hooks.PostBegin; h != nil {
defer func() { h(ctx, conn) }()
}
if h := conn.Proxy.Hooks.PreBegin; h != nil {
if ctx, err = h(conn); err != nil {
return nil, err
}
}
tx, err = conn.Conn.Begin()
if err != nil {
return nil, err
}
if hook := conn.Proxy.Hooks.Begin; hook != nil {
if err = hook(ctx, conn); err != nil {
tx.Rollback()
return nil, err
}
}
return &Tx{
Tx: tx,
Proxy: conn.Proxy,
}, nil
}
作者：jmptrade
项目：rqlit
// Query executes queries that return rows, but don't modify the database.
func (db *DB) Query(queries []string, tx, xTime bool) ([]*Rows, error) {
type Queryer interface {
Query(query string, args []driver.Value) (driver.Rows, error)
}
var allRows []*Rows
err := func() (err error) {
var queryer Queryer
var t driver.Tx
defer func() {
// XXX THIS DOESN'T ACTUALLY WORK! Might as WELL JUST COMMIT?
if t != nil {
if err != nil {
t.Rollback()
return
}
t.Commit()
}
}()
queryer = db.sqlite3conn
// Create the correct query object, depending on whether a
// transaction was requested.
if tx {
t, err = db.sqlite3conn.Begin()
if err != nil {
return err
}
}
for _, q := range queries {
if q == "" {
continue
}
rows := &Rows{}
start := time.Now()
rs, err := queryer.Query(q, nil)
if err != nil {
rows.Error = err.Error()
allRows = append(allRows, rows)
continue
}
defer rs.Close() // This adds to all defers, right? Nothing leaks? XXX Could consume memory. Perhaps anon would be best.
columns := rs.Columns()
rows.Columns = columns
rows.Types = rs.(*sqlite3.SQLiteRows).DeclTypes()
dest := make([]driver.Value, len(rows.Columns))
for {
err := rs.Next(dest)
if err != nil {
if err != io.EOF {
rows.Error = err.Error()
}
break
}
values := make([]interface{}, len(rows.Columns))
// Text values come over (from sqlite-go) as []byte instead of strings
// for some reason, so we have explicitly convert (but only when type
// is "text" so we don't affect BLOB types)
for i, v := range dest {
if rows.Types[i] == "text" {
switch val := v.(type) {
case []byte:
values[i] = string(val)
default:
values[i] = val
}
} else {
values[i] = v
}
}
rows.Values = append(rows.Values, values)
}
if xTime {
rows.Time = time.Now().Sub(start).Seconds()
}
allRows = append(allRows, rows)
}
return nil
}()
return allRows, err
}
作者：Gwil
项目：rqlit
// Query executes queries that return rows, but don't modify the database.
func (db *DB) Query(queries []string, tx, xTime bool) ([]*Rows, error) {
type Queryer interface {
Query(query string, args []driver.Value) (driver.Rows, error)
}
var allRows []*Rows
err := func() (err error) {
var queryer Queryer
var t driver.Tx
defer func() {
// XXX THIS DOESN'T ACTUALLY WORK! Might as WELL JUST COMMIT?
if t != nil {
if err != nil {
t.Rollback()
return
}
t.Commit()
}
}()
queryer = db.sqlite3conn
// Create the correct query object, depending on whether a
// transaction was requested.
if tx {
t, err = db.sqlite3conn.Begin()
if err != nil {
return err
}
}
for _, q := range queries {
if q == "" {
continue
}
rows := &Rows{}
start := time.Now()
rs, err := queryer.Query(q, nil)
if err != nil {
rows.Error = err.Error()
allRows = append(allRows, rows)
continue
}
defer rs.Close() // This adds to all defers, right? Nothing leaks? XXX Could consume memory. Perhaps anon would be best.
columns := rs.Columns()
rows.Columns = columns
rows.Types = rs.(*sqlite3.SQLiteRows).DeclTypes()
dest := make([]driver.Value, len(rows.Columns))
for {
err := rs.Next(dest)
if err != nil {
if err != io.EOF {
rows.Error = err.Error()
}
break
}
values := make([]interface{}, len(rows.Columns))
// Special case -- convert []uint8 to string. Perhaps this should be a config option.
for i, v := range dest {
switch u := v.(type) {
case []uint8:
values[i] = string(u)
default:
values[i] = u
}
}
rows.Values = append(rows.Values, values)
}
if xTime {
rows.Time = time.Now().Sub(start).Seconds()
}
allRows = append(allRows, rows)
}
return nil
}()
return allRows, err
}
作者：jmptrade
项目：rqlit
// Execute executes queries that modify the database.
func (db *DB) Execute(queries []string, tx, xTime bool) ([]*Result, error) {
type Execer interface {
Exec(query string, args []driver.Value) (driver.Result, error)
}
var allResults []*Result
err := func() error {
var execer Execer
var rollback bool
var t driver.Tx
var err error
// Check for the err, if set rollback.
defer func() {
if t != nil {
if rollback {
t.Rollback()
return
}
t.Commit()
}
}()
// handleError sets the error field on the given result. It returns
// whether the caller should continue processing or break.
handleError := func(result *Result, err error) bool {
result.Error = err.Error()
allResults = append(allResults, result)
if tx {
rollback = true // Will trigger the rollback.
return false
}
return true
}
execer = db.sqlite3conn
// Create the correct execution object, depending on whether a
// transaction was requested.
if tx {
t, err = db.sqlite3conn.Begin()
if err != nil {
return err
}
}
// Execute each query.
for _, q := range queries {
if q == "" {
continue
}
result := &Result{}
start := time.Now()
r, err := execer.Exec(q, nil)
if err != nil {
if handleError(result, err) {
continue
}
break
}
lid, err := r.LastInsertId()
if err != nil {
if handleError(result, err) {
continue
}
break
}
result.LastInsertID = lid
ra, err := r.RowsAffected()
if err != nil {
if handleError(result, err) {
continue
}
break
}
result.RowsAffected = ra
if xTime {
result.Time = time.Now().Sub(start).Seconds()
}
allResults = append(allResults, result)
}
return nil
}()
return allResults, err
}
作者：rqlit
项目：rqlit
// Query executes queries that return rows, but don't modify the database.
func (db *DB) Query(queries []string, tx, xTime bool) ([]*Rows, error) {
stats.Add(numQueries, int64(len(queries)))
if tx {
stats.Add(numQTx, 1)
}
type Queryer interface {
Query(query string, args []driver.Value) (driver.Rows, error)
}
var allRows []*Rows
err := func() (err error) {
var queryer Queryer
var t driver.Tx
defer func() {
// XXX THIS DOESN'T ACTUALLY WORK! Might as WELL JUST COMMIT?
if t != nil {
if err != nil {
t.Rollback()
return
}
t.Commit()
}
}()
queryer = db.sqlite3conn
// Create the correct query object, depending on whether a
// transaction was requested.
if tx {
t, err = db.sqlite3conn.Begin()
if err != nil {
return err
}
}
for _, q := range queries {
if q == "" {
continue
}
rows := &Rows{}
start := time.Now()
rs, err := queryer.Query(q, nil)
if err != nil {
rows.Error = err.Error()
allRows = append(allRows, rows)
continue
}
defer rs.Close()
columns := rs.Columns()
rows.Columns = columns
rows.Types = rs.(*sqlite3.SQLiteRows).DeclTypes()
dest := make([]driver.Value, len(rows.Columns))
for {
err := rs.Next(dest)
if err != nil {
if err != io.EOF {
rows.Error = err.Error()
}
break
}
values := normalizeRowValues(dest, rows.Types)
rows.Values = append(rows.Values, values)
}
if xTime {
rows.Time = time.Now().Sub(start).Seconds()
}
allRows = append(allRows, rows)
}
return nil
}()
return allRows, err
}
