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Fix Vtexplains StripComments#5984

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harshit-gangal merged 4 commits intovitessio:masterfrom
planetscale:sa-fix-vtexplain-strip-comments
Apr 2, 2020
Merged

Fix Vtexplains StripComments#5984
harshit-gangal merged 4 commits intovitessio:masterfrom
planetscale:sa-fix-vtexplain-strip-comments

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@saifalharthi saifalharthi commented Mar 27, 2020 •
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Closes #5981
Signed-off-by: Saif Alharthi saif@saifalharthi.me

@saifalharthi saifalharthi requested a review from sougou as a code owner March 27, 2020 19:12
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harshit-gangal commented Mar 28, 2020

Issue related #5981

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saifalharthi commented Mar 28, 2020 •
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Thanks @harshit-gangal. Updated the PR description

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harshit-gangal reviewed Mar 28, 2020
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Fix Vtexplains StripComments
1ddeee0 
Signed-off-by: Saif Alharthi <saif@saifalharthi.me>

Modify for better readability

Signed-off-by: Saif Alharthi <saif@saifalharthi.me>

Make sure anything inside qoutations will not be removed

Signed-off-by: Saif Alharthi <saif@saifalharthi.me>

Modity test for readablity

Signed-off-by: Saif Alharthi <saif@saifalharthi.me>
@saifalharthi saifalharthi force-pushed the sa-fix-vtexplain-strip-comments branch from ba91c1f to 1ddeee0 Compare March 28, 2020 16:56
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harshit-gangal commented Mar 29, 2020 •
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I tried below case and got this
test input: "select * from customer where name like 'abc*/la/*xyz'"
got SQL -> select * from customer where name like 'abcxyz'
want -> select * from customer where name like 'abc*/la/*xyz'
is my expectation correct?

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Use Parser to handle comments if parseable
e907bdb 
Signed-off-by: Saif Alharthi <saif@saifalharthi.me>
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saifalharthi commented Mar 30, 2020

@harshit-gangal Yes, your expectation is correct. I changed the code so it can use the parser. And the previous code if it is not. I am not sure if we should change the tests to display an error the string cannot be parsed. But this seems like a good compromise.

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harshit-gangal commented Mar 31, 2020

Let's switch this function to use splitMarginComments and also fix the current issues with that function.

systay and others added 2 commits April 1, 2020 09:41
@systay
Try to use SplitMarginComments instead of having StripComments() sepa…
9b2f210 
…rately

Signed-off-by: Andres Taylor <andres@planetscale.com>
@saifalharthi
Remove Partition comment from test to match current behaviour for Vitess
309c888 
Signed-off-by: Saif Alharthi <saif@saifalharthi.me>
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saifalharthi commented Apr 1, 2020

I discussed with @sougou about this issue and decided to remove PARTITION so vtexplain can match vitess's current behavior.

@harshit-gangal harshit-gangal merged commit cde37b0 into vitessio:master Apr 2, 2020
@ajm188 ajm188 mentioned this pull request Jun 24, 2020
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@harshit-gangal harshit-gangal harshit-gangal approved these changes

@sougou sougou Awaiting requested review from sougou

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sql like select * from t where name like '*//*' in StripComments will lead to a deadloop and a cpu usage raise

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@saifalharthi @harshit-gangal @systay