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upgrade go-sql-driver/mysql to fix invalid connection error (#5748)
should fix #5736
This commit is contained in:
Lunny Xiao
zeripath
208
vendor/github.com/go-sql-driver/mysql/connection_go18.go
generated
vendored
208
vendor/github.com/go-sql-driver/mysql/connection_go18.go
generated
vendored
@@ -1,208 +0,0 @@
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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
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//
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// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at http://mozilla.org/MPL/2.0/.
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// +build go1.8
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package mysql
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import (
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"context"
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"database/sql"
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"database/sql/driver"
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)
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// Ping implements driver.Pinger interface
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func (mc *mysqlConn) Ping(ctx context.Context) (err error) {
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if mc.closed.IsSet() {
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errLog.Print(ErrInvalidConn)
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return driver.ErrBadConn
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}
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if err = mc.watchCancel(ctx); err != nil {
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return
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}
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defer mc.finish()
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if err = mc.writeCommandPacket(comPing); err != nil {
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return
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}
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return mc.readResultOK()
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}
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// BeginTx implements driver.ConnBeginTx interface
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func (mc *mysqlConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
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if err := mc.watchCancel(ctx); err != nil {
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return nil, err
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}
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defer mc.finish()
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if sql.IsolationLevel(opts.Isolation) != sql.LevelDefault {
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level, err := mapIsolationLevel(opts.Isolation)
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if err != nil {
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return nil, err
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}
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err = mc.exec("SET TRANSACTION ISOLATION LEVEL " + level)
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if err != nil {
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return nil, err
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}
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}
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return mc.begin(opts.ReadOnly)
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}
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func (mc *mysqlConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
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dargs, err := namedValueToValue(args)
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if err != nil {
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return nil, err
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}
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if err := mc.watchCancel(ctx); err != nil {
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return nil, err
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}
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rows, err := mc.query(query, dargs)
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if err != nil {
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mc.finish()
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return nil, err
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}
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rows.finish = mc.finish
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return rows, err
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}
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func (mc *mysqlConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
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dargs, err := namedValueToValue(args)
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if err != nil {
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return nil, err
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}
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if err := mc.watchCancel(ctx); err != nil {
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return nil, err
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}
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defer mc.finish()
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return mc.Exec(query, dargs)
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}
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func (mc *mysqlConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
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if err := mc.watchCancel(ctx); err != nil {
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return nil, err
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}
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stmt, err := mc.Prepare(query)
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mc.finish()
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if err != nil {
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return nil, err
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}
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select {
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default:
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case <-ctx.Done():
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stmt.Close()
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return nil, ctx.Err()
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}
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return stmt, nil
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}
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func (stmt *mysqlStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
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dargs, err := namedValueToValue(args)
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if err != nil {
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return nil, err
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}
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if err := stmt.mc.watchCancel(ctx); err != nil {
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return nil, err
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}
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rows, err := stmt.query(dargs)
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if err != nil {
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stmt.mc.finish()
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return nil, err
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}
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rows.finish = stmt.mc.finish
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return rows, err
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}
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func (stmt *mysqlStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
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dargs, err := namedValueToValue(args)
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if err != nil {
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return nil, err
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}
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if err := stmt.mc.watchCancel(ctx); err != nil {
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return nil, err
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}
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defer stmt.mc.finish()
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return stmt.Exec(dargs)
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}
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func (mc *mysqlConn) watchCancel(ctx context.Context) error {
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if mc.watching {
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// Reach here if canceled,
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// so the connection is already invalid
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mc.cleanup()
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return nil
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}
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if ctx.Done() == nil {
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return nil
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}
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mc.watching = true
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select {
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default:
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case <-ctx.Done():
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return ctx.Err()
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}
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if mc.watcher == nil {
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return nil
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}
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mc.watcher <- ctx
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return nil
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}
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func (mc *mysqlConn) startWatcher() {
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watcher := make(chan mysqlContext, 1)
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mc.watcher = watcher
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finished := make(chan struct{})
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mc.finished = finished
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go func() {
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for {
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var ctx mysqlContext
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select {
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case ctx = <-watcher:
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case <-mc.closech:
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return
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}
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select {
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case <-ctx.Done():
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mc.cancel(ctx.Err())
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case <-finished:
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case <-mc.closech:
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return
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}
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}
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}()
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}
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func (mc *mysqlConn) CheckNamedValue(nv *driver.NamedValue) (err error) {
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nv.Value, err = converter{}.ConvertValue(nv.Value)
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return
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}
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// ResetSession implements driver.SessionResetter.
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// (From Go 1.10)
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func (mc *mysqlConn) ResetSession(ctx context.Context) error {
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if mc.closed.IsSet() {
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return driver.ErrBadConn
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}
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return nil
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}
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