Failed to find column while reading parquet with case insensitive

[jackylee-ch]

Describe the bug
This problem is happenned while we have case sensitive column names in parquet, such as Id7, and scan parquet with case insensitive mode, which means id7 whill be pushed down to source.

To Reproduce

create table test(aa string, bB7 string) using parquet location 'file:///tmp/test';
insert overwrite test values("0","0");
create table test1(aa string, bb7 string) using parquet location 'file:///tmp/test';
select bb7 from test1;

Expected behavior
It should return "0".

Additional context
None

[jackylee-ch]

Already fixed, close current PR.