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expression: handle ErrTruncated when dividing decimals in non-data-change stmts #14438

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merged 9 commits into from
Feb 7, 2020
Merged

expression: handle ErrTruncated when dividing decimals in non-data-change stmts #14438

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63dbf43
expression: fix wrong fraction
qw4990 Jan 10, 2020
3d0e935
Merge remote-tracking branch 'upstream/master' into bugfix-decimal-div
qw4990 Feb 5, 2020
8939558
fixup'
qw4990 Feb 6, 2020
6cdd28d
fixup
qw4990 Feb 6, 2020
bee9d47
Merge remote-tracking branch 'upstream/master' into bugfix-decimal-div
qw4990 Feb 6, 2020
a052d52
add more tests
qw4990 Feb 6, 2020
3ddd231
fixup
qw4990 Feb 6, 2020
1c28cbc
fix CI
qw4990 Feb 6, 2020
899bee4
Merge remote-tracking branch 'upstream/master' into bugfix-decimal-div
qw4990 Feb 7, 2020
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5 changes: 5 additions & 0 deletions expression/integration_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4400,6 +4400,11 @@ func (s *testIntegrationSuite) TestDecimalMul(c *C) {
res.Check(testkit.Rows("0.55125221922461136"))
}

func (s *testIntegrationSuite) TestDecimalDiv(c *C) {
tk := testkit.NewTestKit(c, s.store)
tk.MustQuery("select cast(1 as decimal(60,30)) / cast(1 as decimal(60,30)) / cast(1 as decimal(60, 30))").Check(testkit.Rows("1.000000000000000000000000000000"))
}

func (s *testIntegrationSuite) TestUnknowHintIgnore(c *C) {
tk := testkit.NewTestKit(c, s.store)
tk.MustExec("USE test")
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5 changes: 5 additions & 0 deletions types/mydecimal.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2088,6 +2088,11 @@ func doDivMod(from1, from2, to, mod *MyDecimal, fracIncr int) error {
to.digitsInt = int8(wordsIntTo * digitsPerWord)
to.digitsFrac = int8(wordsFracTo * digitsPerWord)
}

if to.digitsFrac > notFixedDec {
to.digitsFrac = notFixedDec
}

idxTo := 0
stopTo := wordsIntTo + wordsFracTo
if mod == nil {
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