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Nested union with LIMIT handles incorrectly #49874
Labels
affects-5.4
This bug affects 5.4.x versions.
affects-6.1
affects-6.5
affects-7.1
affects-7.5
severity/critical
sig/sql-infra
SIG: SQL Infra
type/bug
The issue is confirmed as a bug.
Comments
This is similar to a fixed issue #49377 but is different. I did a quick debug and looks like the parser missed the inner LIMIT in this case: select * from a where PK = 0
union all
(
select * from b where PK = 0
union all
(select * from b where PK != 0)
order by pk
limit 1 # <----- missing after parsing
)
order by pk
limit 2 |
ti-chi-bot
bot
added
may-affects-5.4
This bug maybe affects 5.4.x versions.
may-affects-6.1
may-affects-6.5
may-affects-7.1
may-affects-7.5
labels
Dec 28, 2023
13 tasks
Defined2014
added
affects-5.4
This bug affects 5.4.x versions.
affects-6.1
affects-6.5
affects-7.1
affects-7.5
labels
Dec 29, 2023
ti-chi-bot
bot
removed
may-affects-5.4
This bug maybe affects 5.4.x versions.
may-affects-6.1
may-affects-6.5
may-affects-7.5
may-affects-7.1
labels
Dec 29, 2023
This was referenced Dec 29, 2023
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Labels
affects-5.4
This bug affects 5.4.x versions.
affects-6.1
affects-6.5
affects-7.1
affects-7.5
severity/critical
sig/sql-infra
SIG: SQL Infra
type/bug
The issue is confirmed as a bug.
Bug Report
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MySQL 8.0:
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master
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