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executor: fix batch point get return wrong result for in(null) #18851

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merged 8 commits into from
Jul 30, 2020
Merged

executor: fix batch point get return wrong result for in(null) #18851

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5b4ccf1
executor: fix batch point get return wrong result for in(null)
tiancaiamao Jul 29, 2020
16df60a
fix CI
tiancaiamao Jul 29, 2020
84688a5
Merge branch 'master' into issue-18843
tiancaiamao Jul 29, 2020
f23678c
address comment
tiancaiamao Jul 29, 2020
22c4736
Merge branch 'master' into issue-18843
crazycs520 Jul 29, 2020
ebc14d7
Merge branch 'master' into issue-18843
ti-srebot Jul 29, 2020
023a330
Merge branch 'master' into issue-18843
coocood Jul 29, 2020
103b937
Merge branch 'master' into issue-18843
tiancaiamao Jul 30, 2020
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8 changes: 8 additions & 0 deletions executor/batch_point_get_test.go
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Expand Up @@ -138,3 +138,11 @@ func (s *testBatchPointGetSuite) TestBatchPointGetCache(c *C) {
tk.MustQuery("SELECT id, token FROM test.customers WHERE id IN (28)")
tk.MustQuery("SELECT id, token FROM test.customers WHERE id IN (28, 29);").Check(testkit.Rows("28 07j", "29 03j"))
}

func (s *testBatchPointGetSuite) TestIssue18843(c *C) {
tk := testkit.NewTestKit(c, s.store)
tk.MustExec("use test")
tk.MustExec("create table t18843 ( id bigint(10) primary key, f varchar(191) default null, unique key `idx_f` (`f`))")
tk.MustExec("insert into t18843 values (1, '')")
tk.MustQuery("select * from t18843 where f in (null)").Check(testkit.Rows())
}
4 changes: 4 additions & 0 deletions executor/point_get.go
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Expand Up @@ -339,6 +339,10 @@ func (e *PointGetExecutor) get(ctx context.Context, key kv.Key) ([]byte, error)
func EncodeUniqueIndexKey(ctx sessionctx.Context, tblInfo *model.TableInfo, idxInfo *model.IndexInfo, idxVals []types.Datum, tID int64) (_ []byte, err error) {
sc := ctx.GetSessionVars().StmtCtx
for i := range idxVals {
if idxVals[i].IsNull() {
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I think is no the right place to fix the bug.
The idxVals should be skipped in higher level.

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We should let the caller know the built key is not valid.

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Done

continue
}

colInfo := tblInfo.Columns[idxInfo.Columns[i].Offset]
// table.CastValue will append 0x0 if the string value's length is smaller than the BINARY column's length.
// So we don't use CastValue for string value for now.
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