into  linux-st28.site:/home/martin/mysql/src/bug32858/my50-bug32858-push


sql/sql_class.cc:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
mysql-test/r/union.result:
  Bug#32858: Manual merge
mysql-test/t/union.test:
  Bug#32858: Manual merge