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