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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 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)
}