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driver_zetta.go
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/
driver_zetta.go
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// Copyright 2020 Zhizhesihai (Beijing) Technology Limited.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package server
import (
"context"
"fmt"
"github.com/pingcap/tidb/kv"
"github.com/zhihu/zetta/tablestore/session"
)
// ZettaDriver implements IDriver.
type ZettaDriver struct {
Store kv.Storage
}
// NewZettaDriver creates a new ZettaDriver
func NewZettaDriver(store kv.Storage) *ZettaDriver {
driver := &ZettaDriver{
Store: store,
}
return driver
}
// ZettaContext implements QueryCtx
type ZettaContext struct {
session session.Session
currentDB string
// query ?
}
func (zc *ZettaContext) CurrentDB() string {
return zc.currentDB
}
func (zc *ZettaContext) Close() error {
zc.session.Close()
return nil
}
func (zc *ZettaContext) Execute(ctx context.Context, query interface{}) ([]ResultSet, error) {
return nil, nil
}
func (zc *ZettaContext) GetSession() session.Session {
return zc.session
}
func (zc *ZettaContext) SetValue(key fmt.Stringer, value interface{}) {
}
// OpenCtx xxx
func (zd *ZettaDriver) OpenCtx(connId uint64, dbname string) (QueryCtx, error) {
se, err := session.CreateSession(zd.Store)
if err != nil {
return nil, err
}
// se.SetTLSState(tlsState)
// err = se.SetCollation(int(collation))
// if err != nil {
// return nil, err
// }
// se.SetClientCapability(capability)
// se.SetConnectionID(connID)
se.SetDB(dbname)
zc := &ZettaContext{
session: se,
currentDB: dbname,
// stmts: make(map[int]*TiDBStatement),
}
return zc, nil
}