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expression: handle builtin add_date/sub_date func overflow (#11472) #11476

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merged 2 commits into from
Jul 27, 2019
Merged

expression: handle builtin add_date/sub_date func overflow (#11472) #11476

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7b80bd5
fix date_add/date_sub function issue
AndrewDi Jul 26, 2019
ac17cc9
add integration test
AndrewDi Jul 27, 2019
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8 changes: 8 additions & 0 deletions expression/builtin_time.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2749,6 +2749,10 @@ func (du *baseDateArithmitical) add(ctx sessionctx.Context, date types.Time, int
date.Fsp = 6
}

if goTime.Year() < 0 || goTime.Year() > (1<<16-1) {
return types.Time{}, true, handleInvalidTimeError(ctx, types.ErrDatetimeFunctionOverflow.GenWithStackByArgs("datetime"))
}

date.Time = types.FromGoTime(goTime)
overflow, err := types.DateTimeIsOverflow(ctx.GetSessionVars().StmtCtx, date)
if err := handleInvalidTimeError(ctx, err); err != nil {
Expand Down Expand Up @@ -2806,6 +2810,10 @@ func (du *baseDateArithmitical) sub(ctx sessionctx.Context, date types.Time, int
date.Fsp = 6
}

if goTime.Year() < 0 || goTime.Year() > (1<<16-1) {
return types.Time{}, true, handleInvalidTimeError(ctx, types.ErrDatetimeFunctionOverflow.GenWithStackByArgs("datetime"))
}

date.Time = types.FromGoTime(goTime)
overflow, err := types.DateTimeIsOverflow(ctx.GetSessionVars().StmtCtx, date)
if err := handleInvalidTimeError(ctx, err); err != nil {
Expand Down
29 changes: 29 additions & 0 deletions expression/builtin_time_test.go
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Expand Up @@ -1820,6 +1820,35 @@ func (s *testEvaluatorSuite) TestDateArithFuncs(c *C) {
c.Assert(err, IsNil)
c.Assert(v.GetMysqlTime().String(), Equals, test.expected)
}

testOverflowYears := []struct {
input string
year int
}{
{"2008-11-23", -1465647104},
{"2008-11-23", 1465647104},
}

for _, test := range testOverflowYears {
args = types.MakeDatums(test.input, test.year, "YEAR")
f, err = fcAdd.getFunction(s.ctx, s.datumsToConstants(args))
c.Assert(err, IsNil)
c.Assert(f, NotNil)
v, err = evalBuiltinFunc(f, chunk.Row{})
c.Assert(err, IsNil)
c.Assert(v.IsNull(), IsTrue)
}

for _, test := range testOverflowYears {
args = types.MakeDatums(test.input, test.year, "YEAR")
f, err = fcSub.getFunction(s.ctx, s.datumsToConstants(args))
c.Assert(err, IsNil)
c.Assert(f, NotNil)
v, err = evalBuiltinFunc(f, chunk.Row{})
c.Assert(err, IsNil)
c.Assert(v.IsNull(), IsTrue)
}

testDurations := []struct {
fc functionClass
dur string
Expand Down
6 changes: 6 additions & 0 deletions expression/integration_test.go
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Expand Up @@ -2068,6 +2068,12 @@ func (s *testIntegrationSuite) TestDatetimeOverflow(c *C) {
rows = append(rows, "<nil>")
}
tk.MustQuery("select * from t1").Check(testkit.Rows(rows...))

//Fix ISSUE 11256
tk.MustQuery(`select DATE_ADD('2000-04-13 07:17:02',INTERVAL -1465647104 YEAR);`).Check(testkit.Rows("<nil>"))
tk.MustQuery(`select DATE_ADD('2008-11-23 22:47:31',INTERVAL 266076160 QUARTER);`).Check(testkit.Rows("<nil>"))
tk.MustQuery(`select DATE_SUB('2000-04-13 07:17:02',INTERVAL 1465647104 YEAR);`).Check(testkit.Rows("<nil>"))
tk.MustQuery(`select DATE_SUB('2008-11-23 22:47:31',INTERVAL -266076160 QUARTER);`).Check(testkit.Rows("<nil>"))
}

func (s *testIntegrationSuite) TestBuiltin(c *C) {
Expand Down