sql: fix a bug with ordinality planning #39086
Merged
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Ordinality node appends an Int column so that it can write to it.
Previously, plan.ResultTypes were appended to before adding a
single group stage which internally used updated ResultTypes to
set up inputs to the ordinality processor. Now this behavior is
fixed and adding a single group stage takes care of updating
ResultTypes accordingly.
Fixes: #38995.
Release note: None