tidb driver 源码
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()
}
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