474 lines
18 KiB
Go
474 lines
18 KiB
Go
// Copyright 2018 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package server
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import (
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"bufio"
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"bytes"
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"context"
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"encoding/binary"
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"fmt"
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"testing"
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"github.com/pingcap/tidb/pkg/parser/mysql"
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"github.com/pingcap/tidb/pkg/server/internal"
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"github.com/pingcap/tidb/pkg/server/internal/column"
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"github.com/pingcap/tidb/pkg/testkit"
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"github.com/pingcap/tidb/pkg/types"
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"github.com/pingcap/tidb/pkg/util/arena"
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"github.com/pingcap/tidb/pkg/util/chunk"
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"github.com/stretchr/testify/require"
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)
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func TestCursorExistsFlag(t *testing.T) {
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store, dom := testkit.CreateMockStoreAndDomain(t)
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srv := CreateMockServer(t, store)
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srv.SetDomain(dom)
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defer srv.Close()
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appendUint32 := binary.LittleEndian.AppendUint32
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ctx := context.Background()
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c := CreateMockConn(t, srv).(*mockConn)
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out := new(bytes.Buffer)
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c.pkt.ResetBufWriter(out)
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c.capability |= mysql.ClientDeprecateEOF | mysql.ClientProtocol41
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tk := testkit.NewTestKitWithSession(t, store, c.Context().Session)
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tk.MustExec("use test")
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tk.MustExec("drop table if exists t")
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tk.MustExec("create table t(a int primary key)")
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tk.MustExec("insert into t values (1), (2), (3), (4), (5), (6), (7), (8)")
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tk.MustQuery("select count(*) from t").Check(testkit.Rows("8"))
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getLastStatus := func() uint16 {
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raw := out.Bytes()
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return binary.LittleEndian.Uint16(raw[len(raw)-4 : len(raw)-2])
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}
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stmt, _, _, err := c.Context().Prepare("select * from t")
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require.NoError(t, err)
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require.NoError(t, c.Dispatch(ctx, append(
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appendUint32([]byte{mysql.ComStmtExecute}, uint32(stmt.ID())),
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mysql.CursorTypeReadOnly, 0x1, 0x0, 0x0, 0x0,
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)))
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require.True(t, mysql.HasCursorExistsFlag(getLastStatus()))
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// fetch first 5
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require.NoError(t, c.Dispatch(ctx, appendUint32(appendUint32([]byte{mysql.ComStmtFetch}, uint32(stmt.ID())), 5)))
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require.True(t, mysql.HasCursorExistsFlag(getLastStatus()))
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// COM_QUERY during fetch
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require.NoError(t, c.Dispatch(ctx, append([]byte{mysql.ComQuery}, "select * from t"...)))
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require.False(t, mysql.HasCursorExistsFlag(getLastStatus()))
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// fetch last 3, the `CursorExist` flag should have been unset and the `LastRowSend` flag should have been set
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require.NoError(t, c.Dispatch(ctx, appendUint32(appendUint32([]byte{mysql.ComStmtFetch}, uint32(stmt.ID())), 5)))
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require.False(t, mysql.HasCursorExistsFlag(getLastStatus()))
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require.True(t, getLastStatus()&mysql.ServerStatusLastRowSend > 0)
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// COM_QUERY after fetch
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require.NoError(t, c.Dispatch(ctx, append([]byte{mysql.ComQuery}, "select * from t"...)))
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require.False(t, mysql.HasCursorExistsFlag(getLastStatus()))
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// try another query without response
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stmt, _, _, err = c.Context().Prepare("select * from t where a = 100")
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require.NoError(t, err)
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require.NoError(t, c.Dispatch(ctx, append(
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appendUint32([]byte{mysql.ComStmtExecute}, uint32(stmt.ID())),
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mysql.CursorTypeReadOnly, 0x1, 0x0, 0x0, 0x0,
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)))
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require.True(t, mysql.HasCursorExistsFlag(getLastStatus()))
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// fetch 5 rows, it will return no data with the `CursorExist` unset and `LastRowSend` set.
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require.NoError(t, c.Dispatch(ctx, appendUint32(appendUint32([]byte{mysql.ComStmtFetch}, uint32(stmt.ID())), 5)))
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require.False(t, mysql.HasCursorExistsFlag(getLastStatus()))
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require.True(t, getLastStatus()&mysql.ServerStatusLastRowSend > 0)
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// the following FETCH should fail, as the cursor has been automatically closed
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require.Error(t, c.Dispatch(ctx, appendUint32(appendUint32([]byte{mysql.ComStmtFetch}, uint32(stmt.ID())), 5)))
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}
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func TestCursorWithParams(t *testing.T) {
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store, dom := testkit.CreateMockStoreAndDomain(t)
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srv := CreateMockServer(t, store)
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srv.SetDomain(dom)
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defer srv.Close()
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appendUint32 := binary.LittleEndian.AppendUint32
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ctx := context.Background()
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c := CreateMockConn(t, srv).(*mockConn)
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tk := testkit.NewTestKitWithSession(t, store, c.Context().Session)
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tk.MustExec("use test")
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tk.MustExec("drop table if exists t")
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tk.MustExec("create table t(id_1 int, id_2 int)")
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tk.MustExec("insert into t values (1, 1), (1, 2)")
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stmt1, _, _, err := c.Context().Prepare("select * from t where id_1 = ? and id_2 = ?")
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require.NoError(t, err)
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stmt2, _, _, err := c.Context().Prepare("select * from t where id_1 = ?")
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require.NoError(t, err)
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// `execute stmt1 using 1,2` with cursor
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require.NoError(t, c.Dispatch(ctx, append(
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appendUint32([]byte{mysql.ComStmtExecute}, uint32(stmt1.ID())),
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mysql.CursorTypeReadOnly, 0x1, 0x0, 0x0, 0x0,
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0x0, 0x1, 0x3, 0x0, 0x3, 0x0,
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0x1, 0x0, 0x0, 0x0, 0x2, 0x0, 0x0, 0x0,
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)))
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rows := c.Context().stmts[stmt1.ID()].GetResultSet().GetRowIterator()
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require.Equal(t, int64(1), rows.Current(context.Background()).GetInt64(0))
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require.Equal(t, int64(2), rows.Current(context.Background()).GetInt64(1))
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rows.Next(context.Background())
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require.Equal(t, rows.End(), rows.Current(context.Background()))
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// `execute stmt2 using 1` with cursor
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require.NoError(t, c.Dispatch(ctx, append(
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appendUint32([]byte{mysql.ComStmtExecute}, uint32(stmt2.ID())),
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mysql.CursorTypeReadOnly, 0x1, 0x0, 0x0, 0x0,
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0x0, 0x1, 0x3, 0x0,
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0x1, 0x0, 0x0, 0x0,
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)))
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rows = c.Context().stmts[stmt2.ID()].GetResultSet().GetRowIterator()
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require.Equal(t, int64(1), rows.Current(context.Background()).GetInt64(0))
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require.Equal(t, int64(1), rows.Current(context.Background()).GetInt64(1))
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require.Equal(t, int64(1), rows.Next(context.Background()).GetInt64(0))
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require.Equal(t, int64(2), rows.Current(context.Background()).GetInt64(1))
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rows.Next(context.Background())
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require.Equal(t, rows.End(), rows.Current(context.Background()))
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// fetch stmt2 with fetch size 256
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require.NoError(t, c.Dispatch(ctx, append(
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appendUint32([]byte{mysql.ComStmtFetch}, uint32(stmt2.ID())),
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0x0, 0x1, 0x0, 0x0,
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)))
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// fetch stmt1 with fetch size 256, as it has more params, if we fetch the result at the first execute command, it
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// will panic because the params have been overwritten and is not long enough.
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require.NoError(t, c.Dispatch(ctx, append(
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appendUint32([]byte{mysql.ComStmtFetch}, uint32(stmt1.ID())),
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0x0, 0x1, 0x0, 0x0,
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)))
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}
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func TestCursorDetachMemTracker(t *testing.T) {
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store, dom := testkit.CreateMockStoreAndDomain(t)
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srv := CreateMockServer(t, store)
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srv.SetDomain(dom)
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defer srv.Close()
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appendUint32 := binary.LittleEndian.AppendUint32
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ctx := context.Background()
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c := CreateMockConn(t, srv).(*mockConn)
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tk := testkit.NewTestKitWithSession(t, store, c.Context().Session)
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tk.MustExec("use test")
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tk.MustExec("drop table if exists t")
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tk.MustExec("create table t(id_1 int, id_2 int)")
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tk.MustExec("insert into t values (1, 1), (1, 2)")
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tk.MustExec("set global tidb_mem_oom_action = 'CANCEL'")
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defer tk.MustExec("set global tidb_mem_oom_action= DEFAULT")
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// TODO: find whether it's expected to have one child at the beginning
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require.Len(t, tk.Session().GetSessionVars().MemTracker.GetChildrenForTest(), 1)
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// execute a normal statement, it'll success
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stmt, _, _, err := c.Context().Prepare("select count(id_2) from t")
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require.NoError(t, err)
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require.NoError(t, c.Dispatch(ctx, append(
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appendUint32([]byte{mysql.ComStmtExecute}, uint32(stmt.ID())),
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mysql.CursorTypeReadOnly, 0x1, 0x0, 0x0, 0x0,
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)))
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maxConsumed := tk.Session().GetSessionVars().MemTracker.MaxConsumed()
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// testkit also uses `PREPARE` related calls to run statement with arguments.
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// format the SQL to avoid the interference from testkit.
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tk.MustExec(fmt.Sprintf("set tidb_mem_quota_query=%d", maxConsumed/2))
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// there is one memTracker for the resultSet spill-disk
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require.Len(t, tk.Session().GetSessionVars().MemTracker.GetChildrenForTest(), 1)
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// This query should exceed the memory limitation during `openExecutor`
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require.Error(t, c.Dispatch(ctx, append(
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appendUint32([]byte{mysql.ComStmtExecute}, uint32(stmt.ID())),
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mysql.CursorTypeReadOnly, 0x1, 0x0, 0x0, 0x0,
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)))
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require.Len(t, tk.Session().GetSessionVars().MemTracker.GetChildrenForTest(), 0)
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// The next query should succeed
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tk.MustExec(fmt.Sprintf("set tidb_mem_quota_query=%d", maxConsumed+1))
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require.Len(t, tk.Session().GetSessionVars().MemTracker.GetChildrenForTest(), 0)
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// This query should succeed
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require.NoError(t, c.Dispatch(ctx, append(
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appendUint32([]byte{mysql.ComStmtExecute}, uint32(stmt.ID())),
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mysql.CursorTypeReadOnly, 0x1, 0x0, 0x0, 0x0,
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)))
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// there is one memTracker for the resultSet spill-disk
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require.Len(t, tk.Session().GetSessionVars().MemTracker.GetChildrenForTest(), 1)
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}
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func TestMemoryTrackForPrepareBinaryProtocol(t *testing.T) {
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store, dom := testkit.CreateMockStoreAndDomain(t)
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srv := CreateMockServer(t, store)
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srv.SetDomain(dom)
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defer srv.Close()
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c := CreateMockConn(t, srv).(*mockConn)
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tk := testkit.NewTestKitWithSession(t, store, c.Context().Session)
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tk.MustExec("use test")
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tk.MustExec("drop table if exists t")
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tk.MustExec("create table t(id_2 int)")
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for i := 0; i <= 10; i++ {
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stmt, _, _, err := c.Context().Prepare("select count(id_2) from t")
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require.NoError(t, err)
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require.NoError(t, stmt.Close())
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}
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require.Len(t, tk.Session().GetSessionVars().MemTracker.GetChildrenForTest(), 0)
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}
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func getExpectOutput(t *testing.T, originalConn *mockConn, writeFn func(conn *clientConn)) []byte {
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buf := bytes.NewBuffer([]byte{})
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conn := &clientConn{
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alloc: arena.NewAllocator(1024),
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capability: originalConn.capability,
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pkt: internal.NewPacketIOForTest(bufio.NewWriter(buf)),
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}
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conn.pkt.SetSequence(originalConn.pkt.Sequence())
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conn.SetCtx(originalConn.getCtx())
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writeFn(conn)
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require.NoError(t, conn.flush(context.Background()))
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return buf.Bytes()
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}
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func expectedLonglongFetchResult(t *testing.T, c *mockConn, i int64) []byte {
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return getExpectOutput(t, c, func(conn *clientConn) {
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var err error
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cols := []*column.Info{{
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Name: "id",
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Table: "t",
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Type: mysql.TypeLonglong,
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}}
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chk := chunk.NewChunkWithCapacity([]*types.FieldType{types.NewFieldType(mysql.TypeLonglong)}, 1)
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chk.AppendInt64(0, i)
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data := make([]byte, 4)
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data, err = column.DumpBinaryRow(data, cols, chk.GetRow(0), conn.rsEncoder)
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require.NoError(t, err)
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require.NoError(t, conn.writePacket(data))
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require.NoError(t, conn.writeEOF(context.Background(), mysql.ServerStatusCursorExists|mysql.ServerStatusAutocommit))
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})
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}
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func TestCursorFetchExecuteWithOpenCursor(t *testing.T) {
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store, dom := testkit.CreateMockStoreAndDomain(t)
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srv := CreateMockServer(t, store)
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srv.SetDomain(dom)
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defer srv.Close()
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appendUint32 := binary.LittleEndian.AppendUint32
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ctx := context.Background()
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c := CreateMockConn(t, srv).(*mockConn)
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c.capability = mysql.ClientProtocol41
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stmt, _, _, err := c.Context().Prepare("select * from (select 1 as id union all select 2 as id union all select 3 as id) t order by id")
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require.NoError(t, err)
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// execute the statement
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require.NoError(t, c.Dispatch(ctx, append(
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appendUint32([]byte{mysql.ComStmtExecute}, uint32(stmt.ID())),
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mysql.CursorTypeReadOnly, 0x1, 0x0, 0x0, 0x0,
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)))
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out := c.GetOutput()
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// fetch one row
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expected := expectedLonglongFetchResult(t, c, 1)
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require.NoError(t, c.Dispatch(ctx, appendUint32(appendUint32([]byte{mysql.ComStmtFetch}, uint32(stmt.ID())), 1)))
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require.NoError(t, c.flush(context.Background()))
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require.Equal(t, expected, out.Bytes())
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out = c.GetOutput()
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// fetch the next row
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expected = expectedLonglongFetchResult(t, c, 2)
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require.NoError(t, c.Dispatch(ctx, appendUint32(appendUint32([]byte{mysql.ComStmtFetch}, uint32(stmt.ID())), 1)))
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require.NoError(t, c.flush(context.Background()))
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require.Equal(t, expected, out.Bytes())
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// re-execute the statement
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require.NoError(t, c.Dispatch(ctx, append(
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appendUint32([]byte{mysql.ComStmtExecute}, uint32(stmt.ID())),
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mysql.CursorTypeReadOnly, 0x1, 0x0, 0x0, 0x0,
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)))
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out = c.GetOutput()
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// the first row should be 1 again
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expected = expectedLonglongFetchResult(t, c, 1)
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require.NoError(t, c.Dispatch(ctx, appendUint32(appendUint32([]byte{mysql.ComStmtFetch}, uint32(stmt.ID())), 1)))
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require.NoError(t, c.flush(context.Background()))
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require.Equal(t, expected, out.Bytes())
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}
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func TestCursorFetchReset(t *testing.T) {
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store, dom := testkit.CreateMockStoreAndDomain(t)
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srv := CreateMockServer(t, store)
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srv.SetDomain(dom)
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defer srv.Close()
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appendUint32 := binary.LittleEndian.AppendUint32
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ctx := context.Background()
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c := CreateMockConn(t, srv).(*mockConn)
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c.capability = mysql.ClientProtocol41
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tk := testkit.NewTestKitWithSession(t, store, c.Context().Session)
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tk.MustExec("use test")
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tk.MustExec("drop table if exists t")
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tk.MustExec("create table t(id_1 BIGINT, id_2 BIGINT)")
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tk.MustExec("insert into t values (1, 1), (1, 2)")
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stmt, _, _, err := c.Context().Prepare("select id_1 from t where id_1 = ?")
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require.NoError(t, err)
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// execute the statement with id_1 = 1
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require.NoError(t, c.Dispatch(ctx, append(
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appendUint32([]byte{mysql.ComStmtExecute}, uint32(stmt.ID())),
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mysql.CursorTypeReadOnly, 0x1, 0x0, 0x0, 0x0,
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0x0, 0x1, 0x3, 0x0,
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0x1, 0x0, 0x0, 0x0,
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)))
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out := c.GetOutput()
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// fetch one row
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expected := expectedLonglongFetchResult(t, c, 1)
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require.NoError(t, c.Dispatch(ctx, appendUint32(appendUint32([]byte{mysql.ComStmtFetch}, uint32(stmt.ID())), 1)))
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require.NoError(t, c.flush(context.Background()))
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require.Equal(t, expected, out.Bytes())
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// reset the statement
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require.NoError(t, c.Dispatch(ctx, appendUint32(
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[]byte{mysql.ComStmtReset}, uint32(stmt.ID()),
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)))
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// the following fetch will fail
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require.Error(t, c.Dispatch(ctx, appendUint32(appendUint32([]byte{mysql.ComStmtFetch}, uint32(stmt.ID())), 1)))
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}
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func dispatchSendLongData(c *mockConn, stmtID int, paramIndex uint16, parameter []byte) error {
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appendUint16 := binary.LittleEndian.AppendUint16
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appendUint32 := binary.LittleEndian.AppendUint32
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return c.Dispatch(context.Background(),
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append(
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appendUint16(
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appendUint32([]byte{mysql.ComStmtSendLongData}, uint32(stmtID)),
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paramIndex), // the index of parameter
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parameter..., // the parameter
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),
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)
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}
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func TestCursorFetchSendLongData(t *testing.T) {
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store, dom := testkit.CreateMockStoreAndDomain(t)
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srv := CreateMockServer(t, store)
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srv.SetDomain(dom)
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defer srv.Close()
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appendUint32 := binary.LittleEndian.AppendUint32
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appendUint64 := binary.LittleEndian.AppendUint64
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ctx := context.Background()
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c := CreateMockConn(t, srv).(*mockConn)
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c.capability = mysql.ClientProtocol41
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tk := testkit.NewTestKitWithSession(t, store, c.Context().Session)
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tk.MustExec("use test")
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tk.MustExec("drop table if exists t")
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tk.MustExec("create table t(id_1 BIGINT, id_2 BIGINT)")
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tk.MustExec("insert into t values (1, 1), (1, 2)")
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// as the `ComStmtSendLongData` only sends bytes parameters, use `SUBSTR(HEX(?), 1, 2)` to convert a little endian 1 to
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// a string "1"
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stmt, _, _, err := c.Context().Prepare("select id_1 from t where id_1 = cast(SUBSTR(HEX(?), 1, 2) as UNSIGNED)")
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require.NoError(t, err)
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// send a parameter to the server
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require.NoError(t, dispatchSendLongData(c, stmt.ID(), 0, appendUint64([]byte{}, 1)))
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// execute the statement without argument
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require.NoError(t, c.Dispatch(ctx, append(
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appendUint32([]byte{mysql.ComStmtExecute}, uint32(stmt.ID())),
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mysql.CursorTypeReadOnly, 0x1, 0x0, 0x0, 0x0,
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0x0, 0x0,
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)))
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out := c.GetOutput()
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// fetch one row
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expected := expectedLonglongFetchResult(t, c, 1)
|
|
require.NoError(t, c.Dispatch(ctx, appendUint32(appendUint32([]byte{mysql.ComStmtFetch}, uint32(stmt.ID())), 1)))
|
|
require.NoError(t, c.flush(context.Background()))
|
|
require.Equal(t, expected, out.Bytes())
|
|
}
|
|
|
|
func TestCursorFetchSendLongDataReset(t *testing.T) {
|
|
store, dom := testkit.CreateMockStoreAndDomain(t)
|
|
srv := CreateMockServer(t, store)
|
|
srv.SetDomain(dom)
|
|
defer srv.Close()
|
|
|
|
appendUint32 := binary.LittleEndian.AppendUint32
|
|
appendUint64 := binary.LittleEndian.AppendUint64
|
|
ctx := context.Background()
|
|
c := CreateMockConn(t, srv).(*mockConn)
|
|
c.capability = mysql.ClientProtocol41
|
|
|
|
tk := testkit.NewTestKitWithSession(t, store, c.Context().Session)
|
|
tk.MustExec("use test")
|
|
tk.MustExec("drop table if exists t")
|
|
tk.MustExec("create table t(id_1 BIGINT, id_2 BIGINT)")
|
|
tk.MustExec("insert into t values (1, 1), (1, 1), (2, 2), (2, 2)")
|
|
|
|
// as the `ComStmtSendLongData` only sends bytes parameters, use `SUBSTR(HEX(?), 1, 2)` to convert a little endian 2 to
|
|
// a string "2"
|
|
stmt, _, _, err := c.Context().Prepare("select id_1 from t where id_1 = cast(SUBSTR(HEX(?), 1, 2) as UNSIGNED)")
|
|
require.NoError(t, err)
|
|
|
|
// send a parameter to the server
|
|
require.NoError(t, dispatchSendLongData(c, stmt.ID(), 0, appendUint64([]byte{}, 1)))
|
|
// reset the statement
|
|
require.NoError(t, c.Dispatch(ctx, appendUint32(
|
|
[]byte{mysql.ComStmtReset}, uint32(stmt.ID())),
|
|
))
|
|
// execute directly will fail
|
|
require.Error(t, c.Dispatch(ctx, append(
|
|
appendUint32([]byte{mysql.ComStmtExecute}, uint32(stmt.ID())),
|
|
mysql.CursorTypeReadOnly, 0x1, 0x0, 0x0, 0x0,
|
|
0x0, 0x0,
|
|
)))
|
|
|
|
// send a parameter to the server
|
|
require.NoError(t, dispatchSendLongData(c, stmt.ID(), 0, appendUint64([]byte{}, 2)))
|
|
require.NoError(t, c.Dispatch(ctx, append(
|
|
appendUint32([]byte{mysql.ComStmtExecute}, uint32(stmt.ID())),
|
|
mysql.CursorTypeReadOnly, 0x1, 0x0, 0x0, 0x0,
|
|
0x0, 0x0,
|
|
)))
|
|
|
|
out := c.GetOutput()
|
|
// fetch one row, it will get "2" because the argument is 2 now.
|
|
expected := expectedLonglongFetchResult(t, c, 2)
|
|
require.NoError(t, c.Dispatch(ctx, appendUint32(appendUint32([]byte{mysql.ComStmtFetch}, uint32(stmt.ID())), 1)))
|
|
require.NoError(t, c.flush(context.Background()))
|
|
require.Equal(t, expected, out.Bytes())
|
|
}
|