85 lines
2.7 KiB
Go
85 lines
2.7 KiB
Go
// Copyright 2017 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 ddl_test
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import (
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"context"
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"sync/atomic"
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"testing"
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"time"
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"github.com/pingcap/tidb/ddl"
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"github.com/pingcap/tidb/parser/model"
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"github.com/pingcap/tidb/session"
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"github.com/pingcap/tidb/store/mockstore"
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"github.com/pingcap/tidb/tablecodec"
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"github.com/pingcap/tidb/testkit"
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"github.com/stretchr/testify/require"
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"github.com/tikv/client-go/v2/tikv"
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)
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func TestTableSplit(t *testing.T) {
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store, err := mockstore.NewMockStore()
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require.NoError(t, err)
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defer func() {
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err := store.Close()
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require.NoError(t, err)
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}()
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session.SetSchemaLease(100 * time.Millisecond)
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session.DisableStats4Test()
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atomic.StoreUint32(&ddl.EnableSplitTableRegion, 1)
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dom, err := session.BootstrapSession(store)
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require.NoError(t, err)
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tk := testkit.NewTestKit(t, store)
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tk.MustExec("use test")
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// Synced split table region.
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tk.MustExec("set global tidb_scatter_region = 1")
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tk.MustExec(`create table t_part (a int key) partition by range(a) (
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partition p0 values less than (10),
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partition p1 values less than (20)
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)`)
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defer dom.Close()
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atomic.StoreUint32(&ddl.EnableSplitTableRegion, 0)
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infoSchema := dom.InfoSchema()
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require.NotNil(t, infoSchema)
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tbl, err := infoSchema.TableByName(model.NewCIStr("mysql"), model.NewCIStr("tidb"))
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require.NoError(t, err)
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checkRegionStartWithTableID(t, tbl.Meta().ID, store.(kvStore))
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tbl, err = infoSchema.TableByName(model.NewCIStr("test"), model.NewCIStr("t_part"))
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require.NoError(t, err)
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pi := tbl.Meta().GetPartitionInfo()
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require.NotNil(t, pi)
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for _, def := range pi.Definitions {
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checkRegionStartWithTableID(t, def.ID, store.(kvStore))
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}
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}
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type kvStore interface {
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GetRegionCache() *tikv.RegionCache
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}
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func checkRegionStartWithTableID(t *testing.T, id int64, store kvStore) {
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regionStartKey := tablecodec.EncodeTablePrefix(id)
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var loc *tikv.KeyLocation
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var err error
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cache := store.GetRegionCache()
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loc, err = cache.LocateKey(tikv.NewBackoffer(context.Background(), 5000), regionStartKey)
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require.NoError(t, err)
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// Region cache may be out of date, so we need to drop this expired region and load it again.
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cache.InvalidateCachedRegion(loc.Region)
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require.Equal(t, []byte(regionStartKey), loc.StartKey)
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}
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