tidb driver 代码
文件路径：/server/driver.go
/ Copyright 2015 PingCAP, Inc.
/
/ 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,
/ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/ See the License for the specific language governing permissions and
/ limitations under the License.
package server
import (
"context"
"crypto/tls"
"github.com/pingcap/tidb/expression"
"github.com/pingcap/tidb/util/chunk"
)
/ IDriver opens IContext.
type IDriver interface {
/ OpenCtx opens an IContext with connection id, client capability, collation, dbname and optionally the tls state.
OpenCtx(connID uint64, capability uint32, collation uint8, dbname string, tlsState *tls.ConnectionState) (*TiDBContext, error)
}
/ PreparedStatement is the interface to use a prepared statement.
type PreparedStatement interface {
/ ID returns statement ID
ID() int
/ Execute executes the statement.
Execute(context.Context, []expression.Expression) (ResultSet, error)
/ AppendParam appends parameter to the statement.
AppendParam(paramID int, data []byte) error
/ NumParams returns number of parameters.
NumParams() int
/ BoundParams returns bound parameters.
BoundParams() [][]byte
/ SetParamsType sets type for parameters.
SetParamsType([]byte)
/ GetParamsType returns the type for parameters.
GetParamsType() []byte
/ StoreResultSet stores ResultSet for subsequent stmt fetching
StoreResultSet(rs ResultSet)
/ GetResultSet gets ResultSet associated this statement
GetResultSet() ResultSet
/ Reset removes all bound parameters.
Reset()
/ Close closes the statement.
Close() error
}
/ ResultSet is the result set of an query.
type ResultSet interface {
Columns() []*ColumnInfo
NewChunk(chunk.Allocator) *chunk.Chunk
Next(context.Context, *chunk.Chunk) error
StoreFetchedRows(rows []chunk.Row)
GetFetchedRows() []chunk.Row
Close() error
/ IsClosed checks whether the result set is closed.
IsClosed() bool
}
/ fetchNotifier represents notifier will be called in COM_FETCH.
type fetchNotifier interface {
/ OnFetchReturned be called when COM_FETCH returns.
/ it will be used in server-side cursor.
OnFetchReturned()
}