func (s *testOrderByRsetSuite) TestOrderByRsetCheckAndUpdateSelectList(c *C) {
resultFields := s.r.Src.GetFields()
fields := make([]*field.Field, len(resultFields))
for i, resultField := range resultFields {
name := resultField.Name
fields[i] = &field.Field{Expr: &expression.Ident{CIStr: model.NewCIStr(name)}}
}
selectList := &plans.SelectList{
HiddenFieldOffset: len(resultFields),
ResultFields: resultFields,
Fields: fields,
}
expr := &expression.Ident{CIStr: model.NewCIStr("id")}
orderByItem := OrderByItem{Expr: expr, Asc: true}
by := []OrderByItem{orderByItem}
r := &OrderByRset{By: by, SelectList: selectList}
// `select id, name from t order by id`
err := r.CheckAndUpdateSelectList(selectList, resultFields)
c.Assert(err, IsNil)
// `select id, name as id from t order by id`
selectList.Fields[1].AsName = "id"
selectList.ResultFields[1].Name = "id"
err = r.CheckAndUpdateSelectList(selectList, resultFields)
c.Assert(err, NotNil)
// `select id, name from t order by count(1) > 1`
aggExpr, err := expression.NewCall("count", []expression.Expression{expression.Value{Val: 1}}, false)
c.Assert(err, IsNil)
r.By[0].Expr = aggExpr
err = r.CheckAndUpdateSelectList(selectList, resultFields)
c.Assert(err, IsNil)
// `select id, name from t order by count(xxx) > 1`
aggExpr, err = expression.NewCall("count", []expression.Expression{&expression.Ident{CIStr: model.NewCIStr("xxx")}}, false)
c.Assert(err, IsNil)
r.By[0].Expr = aggExpr
err = r.CheckAndUpdateSelectList(selectList, resultFields)
c.Assert(err, NotNil)
// `select id, name from t order by xxx`
r.By[0].Expr = &expression.Ident{CIStr: model.NewCIStr("xxx")}
selectList.Fields[1].AsName = "name"
selectList.ResultFields[1].Name = "name"
err = r.CheckAndUpdateSelectList(selectList, resultFields)
c.Assert(err, NotNil)
}
func (s *testHavingRsetSuite) TestHavingRsetCheckAndUpdateSelectList(c *C) {
resultFields := s.r.Src.GetFields()
selectList := s.r.SelectList
groupBy := []expression.Expression{}
// `select id, name from t having id > 1`
err := s.r.CheckAndUpdateSelectList(selectList, groupBy, resultFields)
c.Assert(err, IsNil)
// `select name from t group by id having id > 1`
selectList.ResultFields = selectList.ResultFields[1:]
selectList.Fields = selectList.Fields[1:]
groupBy = []expression.Expression{&expression.Ident{CIStr: model.NewCIStr("id")}}
err = s.r.CheckAndUpdateSelectList(selectList, groupBy, resultFields)
c.Assert(err, IsNil)
// `select name from t group by id + 1 having id > 1`
expr := expression.NewBinaryOperation(opcode.Plus, &expression.Ident{CIStr: model.NewCIStr("id")}, expression.Value{Val: 1})
groupBy = []expression.Expression{expr}
err = s.r.CheckAndUpdateSelectList(selectList, groupBy, resultFields)
c.Assert(err, IsNil)
// `select name from t group by id + 1 having count(1) > 1`
aggExpr, err := expression.NewCall("count", []expression.Expression{expression.Value{Val: 1}}, false)
c.Assert(err, IsNil)
s.r.Expr = aggExpr
err = s.r.CheckAndUpdateSelectList(selectList, groupBy, resultFields)
c.Assert(err, IsNil)
// `select name from t group by id + 1 having count(xxx) > 1`
aggExpr, err = expression.NewCall("count", []expression.Expression{&expression.Ident{CIStr: model.NewCIStr("xxx")}}, false)
c.Assert(err, IsNil)
s.r.Expr = aggExpr
err = s.r.CheckAndUpdateSelectList(selectList, groupBy, resultFields)
c.Assert(err, NotNil)
// `select name from t group by id having xxx > 1`
expr = expression.NewBinaryOperation(opcode.GT, &expression.Ident{CIStr: model.NewCIStr("xxx")}, expression.Value{Val: 1})
s.r.Expr = expr
err = s.r.CheckAndUpdateSelectList(selectList, groupBy, resultFields)
c.Assert(err, NotNil)
}
func (s *testHelperSuite) SetUpSuite(c *C) {
fldx := &field.Field{Expr: &expression.Ident{CIStr: model.NewCIStr("name")}, AsName: "a"}
expr, err := expression.NewCall("count", []expression.Expression{expression.Value{Val: 1}}, false)
c.Assert(err, IsNil)
fldy := &field.Field{Expr: expr}
s.fields = []*field.Field{fldx, fldy}
}
func (s *testVisitorSuite) TestBase(c *C) {
val := expression.Value{Val: 1}
visitor := expression.NewIdentEvalVisitor()
var exp expression.Expression
exp = &expression.Between{Expr: val, Left: val, Right: val}
exp.Accept(visitor)
exp = expression.NewBinaryOperation(opcode.And, val, val)
exp.Accept(visitor)
exp, _ = expression.NewCall("avg", []expression.Expression{val}, true)
exp.Accept(visitor)
rows := [][]interface{}{{1}}
sq := newMockSubQuery(rows, []string{"a"})
exp = expression.NewCompareSubQuery(opcode.EQ, val, sq, true)
exp.Accept(visitor)
exp = &expression.Default{Name: "a"}
exp.Accept(visitor)
exp = expression.NewExistsSubQuery(sq)
exp.Accept(visitor)
when := &expression.WhenClause{Expr: val, Result: val}
exp = &expression.FunctionCase{
WhenClauses: []*expression.WhenClause{when},
Value: val,
ElseClause: val,
}
exp.Accept(visitor)
exp = &expression.FunctionCast{Expr: val, Tp: types.NewFieldType(mysql.TypeLong), FunctionType: expression.ConvertFunction}
exp.Accept(visitor)
exp = &expression.FunctionConvert{Expr: val, Charset: "utf8"}
exp.Accept(visitor)
exp = &expression.FunctionSubstring{StrExpr: expression.Value{Val: "string"}, Pos: expression.Value{Val: 0}, Len: val}
exp.Accept(visitor)
exp = &expression.IsNull{Expr: val}
exp.Accept(visitor)
exp = &expression.IsTruth{Expr: val}
exp.Accept(visitor)
exp = &expression.ParamMarker{Expr: val}
exp.Accept(visitor)
exp = &expression.PatternIn{Expr: val, List: []expression.Expression{val}}
exp.Accept(visitor)
exp = &expression.PatternLike{Expr: val, Pattern: val}
exp.Accept(visitor)
exp = &expression.PatternRegexp{Expr: val, Pattern: val}
exp.Accept(visitor)
exp = &expression.PExpr{Expr: val}
exp.Accept(visitor)
exp = &expression.Position{Name: "a"}
exp.Accept(visitor)
exp = &expression.Row{Values: []expression.Expression{val}}
exp.Accept(visitor)
exp = &expression.UnaryOperation{V: val}
exp.Accept(visitor)
exp = &expression.Values{CIStr: model.NewCIStr("a")}
exp.Accept(visitor)
exp = &expression.Variable{Name: "a"}
exp.Accept(visitor)
}
func (s *testGroupByRsetSuite) TestGroupByRsetPlan(c *C) {
// `select id, name from t group by name`
p, err := s.r.Plan(nil)
c.Assert(err, IsNil)
_, ok := p.(*plans.GroupByDefaultPlan)
c.Assert(ok, IsTrue)
// `select id, name from t group by abc`
s.r.By[0] = expression.Value{Val: "abc"}
_, err = s.r.Plan(nil)
c.Assert(err, IsNil)
// `select id, name from t group by 1`
s.r.By[0] = expression.Value{Val: int64(1)}
_, err = s.r.Plan(nil)
c.Assert(err, IsNil)
s.r.By[0] = expression.Value{Val: uint64(1)}
_, err = s.r.Plan(nil)
c.Assert(err, IsNil)
// `select id, name from t group by 0`
s.r.By[0] = expression.Value{Val: int64(0)}
_, err = s.r.Plan(nil)
c.Assert(err, NotNil)
fldExpr, err := expression.NewCall("count", []expression.Expression{expression.Value{Val: 1}}, false)
c.Assert(err, IsNil)
// `select count(1) as a, name from t group by 1`
fld := &field.Field{Expr: fldExpr, AsName: "a"}
s.r.SelectList.Fields[0] = fld
s.r.By[0] = expression.Value{Val: int64(1)}
_, err = s.r.Plan(nil)
c.Assert(err, NotNil)
// check ambiguous field, like `select id as name, name from t group by name`
s.r.By[0] = &expression.Ident{CIStr: model.NewCIStr("name")}
fldx := &field.Field{Expr: &expression.Ident{CIStr: model.NewCIStr("id")}, AsName: "name"}
fldy := &field.Field{Expr: &expression.Ident{CIStr: model.NewCIStr("name")}, AsName: "name"}
s.r.SelectList.Fields = []*field.Field{fldx, fldy}
s.r.SelectList.ResultFields[0].Name = "name"
s.r.SelectList.ResultFields[1].Name = "name"
p, err = s.r.Plan(nil)
c.Assert(err, NotNil)
// check aggregate function reference, like `select count(1) as a, name from t group by a + 1`
expr := expression.NewBinaryOperation(opcode.Plus, &expression.Ident{CIStr: model.NewCIStr("a")}, expression.Value{Val: 1})
s.r.By[0] = expr
s.r.SelectList.Fields[0] = fld
s.r.SelectList.ResultFields[0].Col.Name = model.NewCIStr("count(id)")
s.r.SelectList.ResultFields[0].Name = "a"
_, err = s.r.Plan(nil)
c.Assert(err, NotNil)
// check contain aggregate function, like `select count(1) as a, name from t group by count(1)`
s.r.By[0] = fldExpr
_, err = s.r.Plan(nil)
c.Assert(err, NotNil)
}
func (s *testHavingRsetSuite) TestHavingRsetCheckAndUpdateSelectList(c *C) {
resultFields := s.r.Src.GetFields()
fields := make([]*field.Field, len(resultFields))
for i, resultField := range resultFields {
name := resultField.Name
fields[i] = &field.Field{Expr: &expression.Ident{CIStr: model.NewCIStr(name)}, Name: name}
}
selectList := &plans.SelectList{
HiddenFieldOffset: len(resultFields),
ResultFields: resultFields,
Fields: fields,
}
groupBy := []expression.Expression{}
// `select id, name from t having id > 1`
err := s.r.CheckAndUpdateSelectList(selectList, groupBy, resultFields)
c.Assert(err, IsNil)
// `select name from t group by id having id > 1`
selectList.ResultFields = selectList.ResultFields[1:]
selectList.Fields = selectList.Fields[1:]
groupBy = []expression.Expression{&expression.Ident{CIStr: model.NewCIStr("id")}}
err = s.r.CheckAndUpdateSelectList(selectList, groupBy, resultFields)
c.Assert(err, IsNil)
// `select name from t group by id + 1 having id > 1`
expr := expression.NewBinaryOperation(opcode.Plus, &expression.Ident{CIStr: model.NewCIStr("id")}, expression.Value{Val: 1})
groupBy = []expression.Expression{expr}
err = s.r.CheckAndUpdateSelectList(selectList, groupBy, resultFields)
c.Assert(err, IsNil)
// `select name from t group by id + 1 having count(1) > 1`
aggExpr, err := expression.NewCall("count", []expression.Expression{expression.Value{Val: 1}}, false)
c.Assert(err, IsNil)
s.r.Expr = aggExpr
err = s.r.CheckAndUpdateSelectList(selectList, groupBy, resultFields)
c.Assert(err, IsNil)
// `select name from t group by id + 1 having count(xxx) > 1`
aggExpr, err = expression.NewCall("count", []expression.Expression{&expression.Ident{CIStr: model.NewCIStr("xxx")}}, false)
c.Assert(err, IsNil)
s.r.Expr = aggExpr
err = s.r.CheckAndUpdateSelectList(selectList, groupBy, resultFields)
c.Assert(err, NotNil)
// `select name from t group by id having xxx > 1`
expr = expression.NewBinaryOperation(opcode.GT, &expression.Ident{CIStr: model.NewCIStr("xxx")}, expression.Value{Val: 1})
s.r.Expr = expr
err = s.r.CheckAndUpdateSelectList(selectList, groupBy, resultFields)
c.Assert(err, NotNil)
}