Avi Kivity 503d21b570 cql3: expr: avoid separating column_mutation_attribute from its column_value when levellizing aggregation depth ...

Since ec77172b4b (" Merge 'cql3: convert
the SELECT clause evaluation phase to expressions' from Avi Kivity"),
we rewrite non-aggregating selectors to include an aggregation, in order
to have the rest of the code either deal with no aggregation, or
all selectors aggregating, with nothing in between. This is done
by wrapping column selectors with "first" function calls: col ->
first(col).

This broke non-aggregating selectors that included the ttl() or
writetime() pseudo functions. This is because we rewrote them as
writetime(first(col)), and writetime() isn't a function that operates
on any values; it operates on mutations and so must have access to
a column, not an expression.

Fix by detecting this scenario and rewriting the expression as
first(writetime(col)).

Unit and integration tests are added.

Fixes #14715.

Closes #14716

2023-07-19 11:35:01 +03:00

18 KiB

Raw Blame History

View Raw