Using multi insert on an indexed tag will cause incorrect lookup results

[cangfengzhs]

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Describe the bug (must be provided)

(root@nebula) [test]> create tag t2(num1 int,num2 int);
Execution succeeded (time spent 1617/1979 us)

Sat, 23 Oct 2021 22:29:41 CST

(root@nebula) [test]> create tag index index_t2_num1 on t2(num1);
Execution succeeded (time spent 1562/1893 us)

Sat, 23 Oct 2021 22:30:27 CST

(root@nebula) [test]> insert vertex t2(num1,num2) VALUES 1:(10,10),1:(20,20);
Execution succeeded (time spent 2227/2542 us)

Sat, 23 Oct 2021 22:31:14 CST

(root@nebula) [test]> lookup on t2 where t2.num1<15 yield t2.num1,t2.num2;
+----------+---------+---------+
| VertexID | t2.num1 | t2.num2 |
+----------+---------+---------+
| 1        | 20      | 20      |
+----------+---------+---------+
Got 1 rows (time spent 2870/3214 us)

Sat, 23 Oct 2021 22:31:38 CST

(root@nebula) [test]> lookup on t2 where t2.num1>15 yield t2.num1,t2.num2;
+----------+---------+---------+
| VertexID | t2.num1 | t2.num2 |
+----------+---------+---------+
| 1        | 20      | 20      |
+----------+---------+---------+
Got 1 rows (time spent 3065/3424 us)

Sat, 23 Oct 2021 22:31:44 CST

(root@nebula) [test]> lookup on t2 where t2.num1>15 yield t2.num1;
+----------+---------+
| VertexID | t2.num1 |
+----------+---------+
| 1        | 20      |
+----------+---------+
Got 1 rows (time spent 3599/3991 us)

Sat, 23 Oct 2021 22:47:45 CST

(root@nebula) [test]> lookup on t2 where t2.num1<15 yield t2.num1;
+----------+---------+
| VertexID | t2.num1 |
+----------+---------+
| 1        | 10      |
+----------+---------+
Got 1 rows (time spent 2995/3325 us)

Sat, 23 Oct 2021 22:47:51 CST

When inserting multiple rows at the same time in the insert statement but the vid of each row is the same, and there is an index on this tag, then two different index keys will be generated on the storage but point to the same vertex.

Your Environments (must be provided)

• OS: uname -a
• Compliler: g++ --version or clang++ --version
• CPU: lscpu
• Commit id (e.g. a3ffc7d8)

How To Reproduce(must be provided)

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1. Step 1
2. Step 2
3. Step 3

Expected behavior

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Additional context

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[Shylock-Hg]

Maybe insert duplicate vertices/edges in one statement should report error.

[cangfengzhs]

Maybe insert duplicate vertices/edges in one statement should report error.

I think it should behave the same as insert one by one