fix: allow empty structs in schema inference #5656
Merged
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Description
Previously, empty structs would be formatted as
STRUCT<>
in theSqlSchemaFormatter
(which for some reason is used independently ofSqlFormatter
, we should dig into that) which would cause parsing to fail because<>
is it's own symbol for "not equal to".This code path was not used in master after #4637 so it was no longer happening. That change has a relatively large surface area, so for the backport I am making the most targeted change possible to address the edge case.
Testing done
Added a unit test, which fails before this fix.
Reviewer checklist