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251 lines
6.8 KiB
251 lines
6.8 KiB
// 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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// See the License for the specific language governing permissions and
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// limitations under the License.
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package core_test
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import (
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. "github.com/pingcap/check"
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"github.com/pingcap/parser/ast"
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"github.com/pingcap/parser/model"
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"github.com/pingcap/tidb/expression"
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"github.com/pingcap/tidb/infoschema"
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"github.com/pingcap/tidb/planner/core"
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"github.com/pingcap/tidb/types/parser_driver"
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"github.com/pingcap/tidb/util/testkit"
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)
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var _ = Suite(&testCacheableSuite{})
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type testCacheableSuite struct {
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}
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func (s *testCacheableSuite) TestCacheable(c *C) {
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store, dom, err := newStoreWithBootstrap()
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c.Assert(err, IsNil)
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tk := testkit.NewTestKit(c, store)
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defer func() {
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dom.Close()
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store.Close()
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}()
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tk.MustExec("use test")
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tk.MustExec("create table t1(a int, b int) partition by range(a) ( partition p0 values less than (6), partition p1 values less than (11) )")
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tk.MustExec("create table t2(a int, b int) partition by hash(a) partitions 11")
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tk.MustExec("create table t3(a int, b int)")
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tbl := &ast.TableName{Schema: model.NewCIStr("test"), Name: model.NewCIStr("t3")}
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is := infoschema.GetInfoSchema(tk.Se)
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// test non-SelectStmt/-InsertStmt/-DeleteStmt/-UpdateStmt/-UnionStmt
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var stmt ast.Node = &ast.ShowStmt{}
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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stmt = &ast.LoadDataStmt{}
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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// test UnionStmt
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stmt = &ast.UnionStmt{}
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c.Assert(core.Cacheable(stmt, is), IsTrue)
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tableRefsClause := &ast.TableRefsClause{TableRefs: &ast.Join{Left: &ast.TableSource{Source: tbl}}}
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// test InsertStmt
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stmt = &ast.InsertStmt{Table: tableRefsClause}
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c.Assert(core.Cacheable(stmt, is), IsTrue)
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// test DeleteStmt
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whereExpr := &ast.FuncCallExpr{}
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stmt = &ast.DeleteStmt{
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TableRefs: tableRefsClause,
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Where: whereExpr,
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}
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c.Assert(core.Cacheable(stmt, is), IsTrue)
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for funcName := range expression.UnCacheableFunctions {
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whereExpr.FnName = model.NewCIStr(funcName)
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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}
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whereExpr.FnName = model.NewCIStr(ast.Rand)
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c.Assert(core.Cacheable(stmt, is), IsTrue)
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stmt = &ast.DeleteStmt{
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TableRefs: tableRefsClause,
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Where: &ast.ExistsSubqueryExpr{},
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}
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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limitStmt := &ast.Limit{
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Count: &driver.ParamMarkerExpr{},
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}
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stmt = &ast.DeleteStmt{
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TableRefs: tableRefsClause,
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Limit: limitStmt,
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}
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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limitStmt = &ast.Limit{
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Offset: &driver.ParamMarkerExpr{},
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}
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stmt = &ast.DeleteStmt{
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TableRefs: tableRefsClause,
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Limit: limitStmt,
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}
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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limitStmt = &ast.Limit{}
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stmt = &ast.DeleteStmt{
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TableRefs: tableRefsClause,
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Limit: limitStmt,
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}
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c.Assert(core.Cacheable(stmt, is), IsTrue)
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stmt.(*ast.DeleteStmt).TableHints = append(stmt.(*ast.DeleteStmt).TableHints, &ast.TableOptimizerHint{
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HintName: model.NewCIStr(core.HintIgnorePlanCache),
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})
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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// test UpdateStmt
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whereExpr = &ast.FuncCallExpr{}
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stmt = &ast.UpdateStmt{
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TableRefs: tableRefsClause,
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Where: whereExpr,
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}
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c.Assert(core.Cacheable(stmt, is), IsTrue)
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for funcName := range expression.UnCacheableFunctions {
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whereExpr.FnName = model.NewCIStr(funcName)
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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}
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whereExpr.FnName = model.NewCIStr(ast.Rand)
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c.Assert(core.Cacheable(stmt, is), IsTrue)
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stmt = &ast.UpdateStmt{
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TableRefs: tableRefsClause,
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Where: &ast.ExistsSubqueryExpr{},
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}
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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limitStmt = &ast.Limit{
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Count: &driver.ParamMarkerExpr{},
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}
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stmt = &ast.UpdateStmt{
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TableRefs: tableRefsClause,
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Limit: limitStmt,
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}
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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limitStmt = &ast.Limit{
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Offset: &driver.ParamMarkerExpr{},
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}
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stmt = &ast.UpdateStmt{
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TableRefs: tableRefsClause,
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Limit: limitStmt,
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}
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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limitStmt = &ast.Limit{}
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stmt = &ast.UpdateStmt{
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TableRefs: tableRefsClause,
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Limit: limitStmt,
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}
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c.Assert(core.Cacheable(stmt, is), IsTrue)
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stmt.(*ast.UpdateStmt).TableHints = append(stmt.(*ast.UpdateStmt).TableHints, &ast.TableOptimizerHint{
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HintName: model.NewCIStr(core.HintIgnorePlanCache),
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})
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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// test SelectStmt
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whereExpr = &ast.FuncCallExpr{}
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stmt = &ast.SelectStmt{
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Where: whereExpr,
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}
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c.Assert(core.Cacheable(stmt, is), IsTrue)
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for funcName := range expression.UnCacheableFunctions {
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whereExpr.FnName = model.NewCIStr(funcName)
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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}
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whereExpr.FnName = model.NewCIStr(ast.Rand)
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c.Assert(core.Cacheable(stmt, is), IsTrue)
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stmt = &ast.SelectStmt{
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Where: &ast.ExistsSubqueryExpr{},
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}
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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limitStmt = &ast.Limit{
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Count: &driver.ParamMarkerExpr{},
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}
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stmt = &ast.SelectStmt{
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Limit: limitStmt,
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}
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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limitStmt = &ast.Limit{
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Offset: &driver.ParamMarkerExpr{},
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}
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stmt = &ast.SelectStmt{
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Limit: limitStmt,
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}
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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limitStmt = &ast.Limit{}
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stmt = &ast.SelectStmt{
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Limit: limitStmt,
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}
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c.Assert(core.Cacheable(stmt, is), IsTrue)
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paramExpr := &driver.ParamMarkerExpr{}
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orderByClause := &ast.OrderByClause{Items: []*ast.ByItem{{Expr: paramExpr}}}
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stmt = &ast.SelectStmt{
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OrderBy: orderByClause,
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}
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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valExpr := &driver.ValueExpr{}
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orderByClause = &ast.OrderByClause{Items: []*ast.ByItem{{Expr: valExpr}}}
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stmt = &ast.SelectStmt{
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OrderBy: orderByClause,
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}
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c.Assert(core.Cacheable(stmt, is), IsTrue)
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stmt.(*ast.SelectStmt).TableHints = append(stmt.(*ast.SelectStmt).TableHints, &ast.TableOptimizerHint{
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HintName: model.NewCIStr(core.HintIgnorePlanCache),
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})
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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boundExpr := &ast.FrameBound{Expr: &driver.ParamMarkerExpr{}}
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c.Assert(core.Cacheable(boundExpr, is), IsFalse)
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// Partition table can not be cached.
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join := &ast.Join{
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Left: &ast.TableName{Schema: model.NewCIStr("test"), Name: model.NewCIStr("t1")},
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Right: &ast.TableName{Schema: model.NewCIStr("test"), Name: model.NewCIStr("t2")},
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}
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stmt = &ast.SelectStmt{
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From: &ast.TableRefsClause{
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TableRefs: join,
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},
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}
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c.Assert(core.Cacheable(stmt, is), IsFalse)
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join = &ast.Join{
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Left: &ast.TableName{Schema: model.NewCIStr("test"), Name: model.NewCIStr("t3")},
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}
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stmt = &ast.SelectStmt{
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From: &ast.TableRefsClause{
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TableRefs: join,
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},
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}
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c.Assert(core.Cacheable(stmt, is), IsTrue)
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}
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