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NTILE/RANK/PERCENT_RANK may cause problems in big statements [CORE6325] #6566

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firebird-automations opened this issue Jun 8, 2020 · 5 comments

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Submitted by: @asfernandes

I do not have a test case, but NTILE/RANK/PERCENT_RANK is using USHORT for its impure offset, which may cause it to overflow and use the space of another statement or expression.

That may cause wrong value or even crashes.

Commits: 191296c cdd35c1

@firebird-automations
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Modified by: @asfernandes

status: Open [ 1 ] => Resolved [ 5 ]

resolution: Fixed [ 1 ]

Fix Version: 4.0 RC 1 [ 10930 ]

assignee: Adriano dos Santos Fernandes [ asfernandes ]

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Modified by: @pavel-zotov

status: Resolved [ 5 ] => Resolved [ 5 ]

QA Status: No test => Not enough information

@firebird-automations
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Modified by: @pavel-zotov

status: Resolved [ 5 ] => Resolved [ 5 ]

QA Status: Not enough information => Cannot be tested

@firebird-automations
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Modified by: @pavel-zotov

status: Resolved [ 5 ] => Closed [ 6 ]

@firebird-automations
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Modified by: @asfernandes

description: I do not have a test case, but NTILE is using USHORT for its impure offset, which may cause it to overflow and use the space of another statement or expression.

That may cause wrong value or even crashes.

=>

I do not have a test case, but NTILE/RANK/PERCENT_RANK is using USHORT for its impure offset, which may cause it to overflow and use the space of another statement or expression.

That may cause wrong value or even crashes.

summary: NTILE may cause problems in big statements => NTILE/RANK/PERCENT_RANK may cause problems in big statements

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