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// Copyright 2017 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package ddl_test
import (
"context"
"sync/atomic"
"time"
. "github.com/pingcap/check"
"github.com/pingcap/parser/model"
"github.com/pingcap/tidb/ddl"
"github.com/pingcap/tidb/session"
"github.com/pingcap/tidb/store/mockstore"
"github.com/pingcap/tidb/store/tikv"
"github.com/pingcap/tidb/tablecodec"
"github.com/pingcap/tidb/util/testkit"
)
type testDDLTableSplitSuite struct{}
var _ = Suite(&testDDLTableSplitSuite{})
func (s *testDDLTableSplitSuite) TestTableSplit(c *C) {
store, err := mockstore.NewMockTikvStore()
c.Assert(err, IsNil)
defer store.Close()
session.SetSchemaLease(100 * time.Millisecond)
session.DisableStats4Test()
atomic.StoreUint32(&ddl.EnableSplitTableRegion, 1)
dom, err := session.BootstrapSession(store)
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
tk.MustExec("use test")
// Synced split table region.
tk.MustExec("set global tidb_scatter_region = 1")
tk.MustExec(`create table t_part (a int key) partition by range(a) (
partition p0 values less than (10),
partition p1 values less than (20)
)`)
defer dom.Close()
atomic.StoreUint32(&ddl.EnableSplitTableRegion, 0)
infoSchema := dom.InfoSchema()
c.Assert(infoSchema, NotNil)
t, err := infoSchema.TableByName(model.NewCIStr("mysql"), model.NewCIStr("tidb"))
c.Assert(err, IsNil)
checkRegionStartWithTableID(c, t.Meta().ID, store.(kvStore))
t, err = infoSchema.TableByName(model.NewCIStr("test"), model.NewCIStr("t_part"))
c.Assert(err, IsNil)
pi := t.Meta().GetPartitionInfo()
c.Assert(pi, NotNil)
for _, def := range pi.Definitions {
checkRegionStartWithTableID(c, def.ID, store.(kvStore))
}
}
type kvStore interface {
GetRegionCache() *tikv.RegionCache
}
func checkRegionStartWithTableID(c *C, id int64, store kvStore) {
regionStartKey := tablecodec.EncodeTablePrefix(id)
var loc *tikv.KeyLocation
var err error
cache := store.GetRegionCache()
loc, err = cache.LocateKey(tikv.NewBackofferWithVars(context.Background(), 5000, nil), regionStartKey)
c.Assert(err, IsNil)
// Region cache may be out of date, so we need to drop this expired region and load it again.
cache.InvalidateCachedRegion(loc.Region)
c.Assert([]byte(loc.StartKey), BytesEquals, []byte(regionStartKey))
}