Fix: handle column name collisions when combining UNION logical inputs & nested Column expressions in maybe_fix_physical_column_name#16064

berkaysynnada merged 9 commits intoapache:mainapache/datafusion:mainfrom

LiaCastaneda:lia/fix-union-schema-field-namesLiaCastaneda/datafusion:lia/fix-union-schema-field-namesCopy head branch name to clipboard