53 lines
2.2 KiB
Go
53 lines
2.2 KiB
Go
// Copyright 2022 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 kvtest
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import (
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"testing"
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"github.com/pingcap/tidb/testkit"
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"github.com/stretchr/testify/require"
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)
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func TestDropStatsFromKV(t *testing.T) {
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store := testkit.CreateMockStore(t)
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tk := testkit.NewTestKit(t, store)
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tk.MustExec("use test")
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tk.MustExec("create table t (c1 varchar(20), c2 varchar(20))")
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tk.MustExec(`insert into t values("1","1"),("2","2"),("3","3"),("4","4")`)
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tk.MustExec("insert into t select * from t")
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tk.MustExec("insert into t select * from t")
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tk.MustExec("analyze table t with 2 topn")
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tblID := tk.MustQuery(`select tidb_table_id from information_schema.tables where table_name = "t" and table_schema = "test"`).Rows()[0][0].(string)
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tk.MustQuery("select modify_count, count from mysql.stats_meta where table_id = " + tblID).Check(
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testkit.Rows("0 16"))
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tk.MustQuery("select hist_id from mysql.stats_histograms where table_id = " + tblID).Check(
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testkit.Rows("1", "2"))
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ret := tk.MustQuery("select hist_id, bucket_id from mysql.stats_buckets where table_id = " + tblID)
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require.True(t, len(ret.Rows()) > 0)
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ret = tk.MustQuery("select hist_id from mysql.stats_top_n where table_id = " + tblID)
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require.True(t, len(ret.Rows()) > 0)
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tk.MustExec("drop stats t")
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tk.MustQuery("select modify_count, count from mysql.stats_meta where table_id = " + tblID).Check(
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testkit.Rows("0 16"))
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tk.MustQuery("select hist_id from mysql.stats_histograms where table_id = " + tblID).Check(
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testkit.Rows())
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tk.MustQuery("select hist_id, bucket_id from mysql.stats_buckets where table_id = " + tblID).Check(
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testkit.Rows())
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tk.MustQuery("select hist_id from mysql.stats_top_n where table_id = " + tblID).Check(
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testkit.Rows())
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}
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