7f66be84d5
This pr do two things: 1. Infer the column name if the column is expression in `select into outfile`. The rule for column name generation can be refered in pr: #24990 2. fix bug that it will core dump if the `_schema` fails to build in the open phase in vorc_transformer.cpp TODO: 1. Support infer the column name if the column is expression in `select into outfile` in new optimizer(Nereids).