Rework comment on operator & support show_macros function

[hououou]

see #3179

[codecov]

Codecov Report

Attention: Patch coverage is 76.17021% with 56 lines in your changes are missing coverage. Please review.

Project coverage is 92.16%. Comparing base (d946982) to head (98576b5).
Report is 11 commits behind head on master.

❗ Current head 98576b5 differs from pull request most recent head 51a0e55. Consider uploading reports for the commit 51a0e55 to get more accurate results

Files	Patch %	Lines
src/storage/wal/wal_record.cpp	52.56%	37 Missing ⚠️
src/storage/wal_replayer.cpp	43.47%	13 Missing ⚠️
src/include/storage/wal/wal_record.h	66.66%	4 Missing ⚠️
src/catalog/catalog.cpp	95.65%	1 Missing ⚠️
src/function/table/call/show_macros.cpp	96.96%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3205      +/-   ##
==========================================
- Coverage   92.28%   92.16%   -0.13%     
==========================================
  Files        1161     1151      -10     
  Lines       44150    44117      -33     
==========================================
- Hits        40744    40659      -85     
- Misses       3406     3458      +52     

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[ray6080]

I haven't finished review on transaction part. will continue later. but I feel you should wait for my PR (#3204) to be merged, which refactored how wal is serialized.

[ray6080]

@hououou can you do a rebase? I can review after rebasing.

[ray6080]

This is stale now. See #3656.