Range vector incorrectly accepts embedded offset modifier

[PeterZaitsev]

Hi,

rate(mysql_global_status_questions{alias="$host"} offset 1d[$interval])

is allowed and it returns data without any offset.

rate(mysql_global_status_questions{alias="$host"}[$interval] offset 1d)

is correct syntax which returns proper data

Is there any reason 1st variant does not return and error ?

[grobie]

According to the documentation of range selector and offsets, the behavior of the first expression is undefined. I believe it's an oversight that it parses the range vector expression ignoring the offset.

[lock]

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