lookup with dedup

[caton-hpg]

What type of PR is this?

• bug
• feature
• enhancement

What problem(s) does this PR solve?

Issue(s) number: #4602

Description:

yield distinct not return a distinct result set in LOOKUP

How do you solve it?

Add Dedup plan node in LookupPlanner.

(root@nebula) [nba]> lookup on player where player.age>40 yield keys(vertex) as p;
+-----------------+
| p               |
+-----------------+
| ["age", "name"] |
| ["age", "name"] |
| ["age", "name"] |
| ["age", "name"] |
| ["age", "name"] |
| ["age", "name"] |
| ["age", "name"] |
| ["age", "name"] |
+-----------------+
Got 8 rows (time spent 7735/8484 us)

Fri, 16 Sep 2022 11:12:03 CST

(root@nebula) [nba]> lookup on player where player.age>40 yield distinct keys(vertex) as p;
+-----------------+
| p               |
+-----------------+
| ["age", "name"] |
+-----------------+
Got 1 rows (time spent 7447/8064 us)

Fri, 16 Sep 2022 11:12:15 CST

Special notes for your reviewer, ex. impact of this fix, design document, etc:

Checklist:

Tests:

• Unit test(positive and negative cases)
• Function test
• Performance test
• N/A

Affects:

• Documentation affected (Please add the label if documentation needs to be modified.)
• Incompatibility (If it breaks the compatibility, please describe it and add the label.）
• If it's needed to cherry-pick (If cherry-pick to some branches is required, please label the destination version(s).)
• Performance impacted: Consumes more CPU/Memory

Release notes:

Please confirm whether to be reflected in release notes and how to describe:

ex. Fixed the bug .....

[codecov-commenter]

Codecov Report

Base: 84.66% // Head: 84.72% // Increases project coverage by +0.05% 🎉

Coverage data is based on head (0872a01) compared to base (9c745d5).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4651      +/-   ##
==========================================
+ Coverage   84.66%   84.72%   +0.05%     
==========================================
  Files        1358     1358              
  Lines      135646   135651       +5     
==========================================
+ Hits       114848   114929      +81     
+ Misses      20798    20722      -76     

Impacted Files	Coverage Δ
src/graph/planner/ngql/LookupPlanner.cpp	100.00% <100.00%> (ø)
src/graph/planner/Planner.cpp	75.00% <0.00%> (-5.00%)	⬇️
...eta/processors/session/SessionManagerProcessor.cpp	73.54% <0.00%> (-4.52%)	⬇️
src/kvstore/wal/WalFileIterator.cpp	64.40% <0.00%> (-4.24%)	⬇️
src/kvstore/raftex/Host.cpp	72.34% <0.00%> (-3.22%)	⬇️
src/clients/storage/StorageClientBase-inl.h	76.71% <0.00%> (-2.06%)	⬇️
src/parser/GraphScanner.h	92.63% <0.00%> (-2.00%)	⬇️
src/storage/admin/AdminTaskManager.cpp	80.40% <0.00%> (-1.60%)	⬇️
src/graph/session/GraphSessionManager.cpp	78.78% <0.00%> (-1.30%)	⬇️
src/kvstore/wal/test/AtomicLogBufferTest.cpp	94.73% <0.00%> (-1.06%)	⬇️
... and 38 more

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[jievince]

Good job!

[jinyingsunny]

3.3 rc和3.3-ent rc
已check

[foesa-yang]

vesoft-inc/nebula-docs-cn#2512