151 lines
4.2 KiB
Go
151 lines
4.2 KiB
Go
// Copyright 2016 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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// See the License for the specific language governing permissions and
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// limitations under the License.
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package executor
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import (
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. "github.com/pingcap/check"
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"github.com/pingcap/tidb/ast"
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"github.com/pingcap/tidb/expression"
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"github.com/pingcap/tidb/kv"
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"github.com/pingcap/tidb/model"
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"github.com/pingcap/tidb/mysql"
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"github.com/pingcap/tidb/tablecodec"
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"github.com/pingcap/tidb/types"
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"github.com/pingcap/tidb/util"
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"github.com/pingcap/tidb/util/mock"
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goctx "golang.org/x/net/context"
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)
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var _ = Suite(&testExecSuite{})
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type testExecSuite struct {
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}
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type handleRange struct {
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start int64
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end int64
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}
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func getExpectedRanges(tid int64, hrs []*handleRange) []kv.KeyRange {
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krs := make([]kv.KeyRange, 0, len(hrs))
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for _, hr := range hrs {
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startKey := tablecodec.EncodeRowKeyWithHandle(tid, hr.start)
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endKey := tablecodec.EncodeRowKeyWithHandle(tid, hr.end)
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krs = append(krs, kv.KeyRange{StartKey: startKey, EndKey: endKey})
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}
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return krs
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}
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func (s *testExecSuite) TestMergeHandles(c *C) {
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handles := []int64{0, 2, 3, 4, 5, 10, 11, 100}
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// Build expected key ranges.
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hrs := make([]*handleRange, 0, len(handles))
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hrs = append(hrs, &handleRange{start: 0, end: 1})
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hrs = append(hrs, &handleRange{start: 2, end: 6})
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hrs = append(hrs, &handleRange{start: 10, end: 12})
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hrs = append(hrs, &handleRange{start: 100, end: 101})
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expectedKrs := getExpectedRanges(1, hrs)
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// Build key ranges.
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krs := tableHandlesToKVRanges(1, handles)
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// Compare key ranges and expected key ranges.
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c.Assert(len(krs), Equals, len(expectedKrs))
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for i, kr := range krs {
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ekr := expectedKrs[i]
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c.Assert(kr.StartKey, DeepEquals, ekr.StartKey)
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c.Assert(kr.EndKey, DeepEquals, ekr.EndKey)
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}
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}
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// mockSessionManager is a mocked session manager which is used for test.
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type mockSessionManager struct {
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PS []util.ProcessInfo
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}
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// ShowProcessList implements the SessionManager.ShowProcessList interface.
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func (msm *mockSessionManager) ShowProcessList() []util.ProcessInfo {
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return msm.PS
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}
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// Kill implements the SessionManager.Kill interface.
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func (msm *mockSessionManager) Kill(cid uint64, query bool) {
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}
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func (s *testExecSuite) TestShowProcessList(c *C) {
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// Compose schema.
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names := []string{"Id", "User", "Host", "db", "Command", "Time", "State", "Info"}
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ftypes := []byte{mysql.TypeLonglong, mysql.TypeVarchar, mysql.TypeVarchar,
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mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeLong, mysql.TypeVarchar, mysql.TypeString}
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schema := buildSchema(names, ftypes)
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// Compose a mocked session manager.
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ps := make([]util.ProcessInfo, 0, 1)
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pi := util.ProcessInfo{
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ID: 0,
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User: "test",
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Host: "127.0.0.1",
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DB: "test",
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Command: "select * from t",
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State: 1,
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Info: "",
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}
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ps = append(ps, pi)
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sm := &mockSessionManager{
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PS: ps,
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}
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ctx := mock.NewContext()
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ctx.SetSessionManager(sm)
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// Compose executor.
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e := &ShowExec{
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baseExecutor: newBaseExecutor(schema, ctx),
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Tp: ast.ShowProcessList,
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}
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goCtx := goctx.Background()
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// Run test and check results.
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for _, p := range ps {
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r, err := e.Next(goCtx)
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c.Assert(err, IsNil)
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c.Assert(r, NotNil)
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c.Assert(r[0].GetUint64(), Equals, p.ID)
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}
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r, err := e.Next(goCtx)
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c.Assert(err, IsNil)
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c.Assert(r, IsNil)
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}
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func buildSchema(names []string, ftypes []byte) *expression.Schema {
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schema := expression.NewSchema(make([]*expression.Column, 0, len(names))...)
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for i := range names {
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col := &expression.Column{
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ColName: model.NewCIStr(names[i]),
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}
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// User varchar as the default return column type.
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tp := mysql.TypeVarchar
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if len(ftypes) != 0 && ftypes[0] != mysql.TypeUnspecified {
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tp = ftypes[0]
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}
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fieldType := types.NewFieldType(tp)
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fieldType.Flen, fieldType.Decimal = mysql.GetDefaultFieldLengthAndDecimal(tp)
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fieldType.Charset, fieldType.Collate = types.DefaultCharsetForType(tp)
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col.RetType = fieldType
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schema.Append(col)
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}
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return schema
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}
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