bug: Datafusion doesn't respect case sensitive table references

[xhwhis]

Which issue does this PR close?

Closes #.

Rationale for this change

Table alias will process uppercase alias into lowercase. This PR will fix it.

What changes are included in this PR?

TableReference::parse_str method converts uppercase to lowercase. The alias here has already undergone normalize, so we can directly create a TableReference as a parameter.

Are these changes tested?

Yes

Are there any user-facing changes?

No

[comphead]

Thanks @xhwhis for your contribution
Would you mind adding more details on reason why this change is need, and would be great to cover the change with unit tests

[xhwhis]

Thanks @xhwhis for your contribution Would you mind adding more details on reason why this change is need, and would be great to cover the change with unit tests

You can use datafusion-cli to observe the uppercase bug in table alias.

DataFusion CLI v34.0.0
❯ CREATE TABLE IF NOT EXISTS valuetable(c1 INT, c2 VARCHAR) AS VALUES(1,'HELLO'),(12,'DATAFUSION');
0 rows in set. Query took 0.066 seconds.

❯ SELECT "TEST".c1 from valuetable as "TEST";
Schema error: No field named test.c1. Valid fields are test.c1, test.c2.

I believe this PR have a minimal impact. I have added unit tests to cover the changes. Please review. @comphead

[comphead]

I'm able to reproduce with

❯ select "T".* from (select 1 a) as "T";
Error during planning: Invalid qualifier T
❯ select t.* from (select 1 a) as "T";
+---+
| a |
+---+
| 1 |
+---+
1 row in set. Query took 0.005 seconds.

Please include this test into the test case, and would be nice to move tests into select.slt sqllogic test file

[xhwhis]

Please include this test into the test case, and would be nice to move tests into select.slt sqllogic test file

I have added sqllogictests as per your suggestion.

[comphead]

I think we getting closer, please move those tests to select.rs you may want to use EXPLAIN keyword to get the plan

[xhwhis]

Done.

[comphead]

Thanks @xhwhis we are really close

[comphead]

Suggested change

	WITH "T" AS (SELECT 1 a) SELECT * FROM "T"
	WITH "T" AS (SELECT 1 a) SELECT "T".* FROM "T"

[xhwhis]

Done.

[comphead]

lgtm thanks @xhwhis
since it is first time contribution I'm leaving it for sometime to let other people review as well

[comphead]

Please add a test description

[alamb]

Suggested change

	query I
	# Ensure table aliases can be case sensitive
	query I

[xhwhis]

Done. @alamb @comphead

[comphead]

ditto

[alamb]

Suggested change

	query I
	# Ensure table aliases can be case sensitive
	query I

[alamb]

Suggested change

	query TT
	# Ensure table aliases can be case sensitive
	query TT

[alamb]

Thank you @xhwhis -- this looks great. I plan to merge it after CI passes

[alamb]

Thanks again @xhwhis