104 lines
3.9 KiB
Go
104 lines
3.9 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 bindinfo
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import (
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"testing"
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"time"
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"github.com/pingcap/tidb/pkg/bindinfo/norm"
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"github.com/pingcap/tidb/pkg/parser"
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"github.com/pingcap/tidb/pkg/sessionctx/variable"
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"github.com/stretchr/testify/require"
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)
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func bindingNoDBDigest(t *testing.T, b *Binding) string {
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p := parser.New()
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stmt, err := p.ParseOneStmt(b.BindSQL, b.Charset, b.Collation)
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require.NoError(t, err)
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_, noDBDigest := norm.NormalizeStmtForBinding(stmt, norm.WithoutDB(true))
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return noDBDigest
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}
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func TestCrossDBBindingCache(t *testing.T) {
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fbc := newBindCache(nil).(*bindingCache)
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b1 := &Binding{BindSQL: "SELECT * FROM db1.t1", SQLDigest: "b1"}
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fDigest1 := bindingNoDBDigest(t, b1)
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b2 := &Binding{BindSQL: "SELECT * FROM db2.t1", SQLDigest: "b2"}
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b3 := &Binding{BindSQL: "SELECT * FROM db2.t3", SQLDigest: "b3"}
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fDigest3 := bindingNoDBDigest(t, b3)
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// add 3 bindings and b1 and b2 have the same noDBDigest
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require.NoError(t, fbc.SetBinding(b1.SQLDigest, b1))
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require.NoError(t, fbc.SetBinding(b2.SQLDigest, b2))
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require.NoError(t, fbc.SetBinding(b3.SQLDigest, b3))
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require.Equal(t, len(fbc.digestBiMap.(*digestBiMapImpl).noDBDigest2SQLDigest), 2) // b1 and b2 have the same noDBDigest
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require.Equal(t, len(fbc.digestBiMap.NoDBDigest2SQLDigest(fDigest1)), 2)
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require.Equal(t, len(fbc.digestBiMap.NoDBDigest2SQLDigest(fDigest3)), 1)
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require.Equal(t, len(fbc.digestBiMap.(*digestBiMapImpl).sqlDigest2noDBDigest), 3)
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_, ok := fbc.digestBiMap.(*digestBiMapImpl).sqlDigest2noDBDigest[b1.SQLDigest]
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require.True(t, ok)
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_, ok = fbc.digestBiMap.(*digestBiMapImpl).sqlDigest2noDBDigest[b2.SQLDigest]
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require.True(t, ok)
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_, ok = fbc.digestBiMap.(*digestBiMapImpl).sqlDigest2noDBDigest[b3.SQLDigest]
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require.True(t, ok)
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// remove b2
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fbc.RemoveBinding(b2.SQLDigest)
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require.Equal(t, len(fbc.digestBiMap.(*digestBiMapImpl).noDBDigest2SQLDigest), 2)
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require.Equal(t, len(fbc.digestBiMap.(*digestBiMapImpl).noDBDigest2SQLDigest[fDigest1]), 1)
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require.Equal(t, len(fbc.digestBiMap.(*digestBiMapImpl).noDBDigest2SQLDigest[fDigest3]), 1)
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require.Equal(t, len(fbc.digestBiMap.(*digestBiMapImpl).sqlDigest2noDBDigest), 2)
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_, ok = fbc.digestBiMap.(*digestBiMapImpl).sqlDigest2noDBDigest[b1.SQLDigest]
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require.True(t, ok)
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_, ok = fbc.digestBiMap.(*digestBiMapImpl).sqlDigest2noDBDigest[b2.SQLDigest]
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require.False(t, ok) // can't find b2 now
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_, ok = fbc.digestBiMap.(*digestBiMapImpl).sqlDigest2noDBDigest[b3.SQLDigest]
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require.True(t, ok)
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}
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func TestBindCache(t *testing.T) {
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binding := &Binding{BindSQL: "SELECT * FROM t1"}
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kvSize := int(binding.size())
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defer func(v int64) {
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variable.MemQuotaBindingCache.Store(v)
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}(variable.MemQuotaBindingCache.Load())
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variable.MemQuotaBindingCache.Store(int64(kvSize*3) - 1)
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bindCache := newBindCache(nil)
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defer bindCache.Close()
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err := bindCache.SetBinding("digest1", binding)
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require.Nil(t, err)
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require.NotNil(t, bindCache.GetBinding("digest1"))
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err = bindCache.SetBinding("digest2", binding)
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require.Nil(t, err)
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require.NotNil(t, bindCache.GetBinding("digest2"))
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err = bindCache.SetBinding("digest3", binding)
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require.Nil(t, err)
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require.NotNil(t, bindCache.GetBinding("digest3"))
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require.Eventually(t, func() bool {
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hit := 0
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for _, digest := range []string{"digest1", "digest2", "digest3"} {
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if bindCache.GetBinding(digest) != nil {
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hit++
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}
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}
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return hit == 2
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}, time.Second*5, time.Millisecond*100)
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}
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