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planner: fix panic when prepare and execute the insert on duplicate (#37924) #39841

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merged 2 commits into from
Dec 12, 2022
Merged

planner: fix panic when prepare and execute the insert on duplicate (#37924) #39841

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cf370d3
This is an automated cherry-pick of #37924
Reminiscent Sep 22, 2022
f800e5c
fix ut
Reminiscent Dec 12, 2022
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12 changes: 12 additions & 0 deletions executor/insert_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -343,6 +343,18 @@ func (s *testSuite3) TestUpdateDuplicateKey(c *C) {
c.Assert(err.Error(), Equals, "[kv:1062]Duplicate entry '1-2-4' for key 'PRIMARY'")
}

func (s *testSuite3) TestIssue37187(c *C) {
tk := testkit.NewTestKit(c, s.store)
tk.MustExec("use test")

tk.MustExec("drop table if exists a, b")
tk.MustExec("create table t1 (a int(11) ,b varchar(100) ,primary key (a));")
tk.MustExec("create table t2 (c int(11) ,d varchar(100) ,primary key (c));")
tk.MustExec("prepare in1 from 'insert into t1 (a,b) select c,null from t2 t on duplicate key update b=t.d';")
err := tk.ExecToErr("execute in1;")
c.Assert(err, Equals, nil)
}

func (s *testSuite3) TestInsertWrongValueForField(c *C) {
tk := testkit.NewTestKit(c, s.store)
tk.MustExec("use test")
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5 changes: 5 additions & 0 deletions planner/core/planbuilder.go
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Original file line number Diff line number Diff line change
Expand Up @@ -3155,6 +3155,11 @@ func (b *PlanBuilder) buildSelectPlanOfInsert(ctx context.Context, insert *ast.I
}
sel.Fields.Fields = append(sel.Fields.Fields, &ast.SelectField{Expr: colName, Offset: len(sel.Fields.Fields)})
}
defer func(originSelFieldLen int) {
// Revert the change for ast. Because when we use the 'prepare' and 'execute' statement it will both build plan which will cause problem.
// You can see the issue #37187 for more details.
sel.Fields.Fields = sel.Fields.Fields[:originSelFieldLen]
}(actualColLen)
}
}
}
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