explain query: comment column is null

[actondev]

Hi!
I just noticed a difference between litecli & sqlite default cli when running explain <some query>

• litecli --version
  Version: 1.6.0
• sqlite3 --version
  3.36.0 2021-06-18 18:36:39 5c9a6c06871cb9fe42814af9c039eb6da5427a6ec28f187af7ebfb62eafa66e5

litecli:

sqlite3 cli

[amjith]

I'm able to reproduce it. Looking into it. Thanks for filing the report.

[kracekumar]

I see this is the case with Python CLI too

python3 -m sqlite3 ../Downloads/github.db "explain select name from repos"
(0, 'Init', 0, 7, 0, None, 0, None)
(1, 'OpenRead', 0, 3, 0, '3', 0, None)
(2, 'Rewind', 0, 6, 0, None, 0, None)
(3, 'Column', 0, 2, 1, None, 0, None)
(4, 'ResultRow', 1, 1, 0, None, 0, None)
(5, 'Next', 0, 3, 0, None, 1, None)
(6, 'Halt', 0, 0, 0, None, 0, None)
(7, 'Transaction', 0, 0, 203, '0', 1, None)
(8, 'Goto', 0, 1, 0, None, 0, None)

I tried with sqlite-utils same result

uvx sqlite-utils ../Downloads/github.db 'explain select name from repos'
[{"addr": 0, "opcode": "Init", "p1": 0, "p2": 7, "p3": 0, "p4": null, "p5": 0, "comment": null},
 {"addr": 1, "opcode": "OpenRead", "p1": 0, "p2": 3, "p3": 0, "p4": "3", "p5": 0, "comment": null},
 {"addr": 2, "opcode": "Rewind", "p1": 0, "p2": 6, "p3": 0, "p4": null, "p5": 0, "comment": null},
 {"addr": 3, "opcode": "Column", "p1": 0, "p2": 2, "p3": 1, "p4": null, "p5": 0, "comment": null},
 {"addr": 4, "opcode": "ResultRow", "p1": 1, "p2": 1, "p3": 0, "p4": null, "p5": 0, "comment": null},
 {"addr": 5, "opcode": "Next", "p1": 0, "p2": 3, "p3": 0, "p4": null, "p5": 1, "comment": null},
 {"addr": 6, "opcode": "Halt", "p1": 0, "p2": 0, "p3": 0, "p4": null, "p5": 0, "comment": null},
 {"addr": 7, "opcode": "Transaction", "p1": 0, "p2": 0, "p3": 203, "p4": "0", "p5": 1, "comment": null},
 {"addr": 8, "opcode": "Goto", "p1": 0, "p2": 1, "p3": 0, "p4": null, "p5": 0, "comment": null}]

As per claude this seems to be the functionality of the sqlite shell.c(seems to be true)

I tried db-browser-for-sqlite and similar result

I don't think so it's possible to replicate the behaviour, @amjith is my understanding correct here?

[amjith]

You are correct. I was really hoping that there would be a way to get the results programmatically but no such luck. This particular comment is implemented in the sqlite shell (as you mentioned) and not available at the sql engine.

[kracekumar]

Thanks @amjith and @actondev for reporting. It was good learning experience. Given that, there is no path forward, I'll close the issue.

thanks for reporting!