Revert "[SPARK-29644][SQL] Corrected ShortType and ByteType mapping to SmallInt and TinyInt in JDBCUtils

[shivsood]

This reverts commit f7e53865 i.e PR #26301 from master

[shivsood]

@dongjoon-hyun as FYI on revert for #26301 in master

[dongjoon-hyun]

Ur, do you want to revert fully? What I meant was the ByteType <-> TinyInt part only.
For the full revert, I can do that without making a PR.

[dongjoon-hyun]

cc @gatorsmile , @srowen

[shivsood]

@dongjoon-hyun 'll prefer a full revert to keep this clean and inline with what was done in 2.4. I will come back with PR for ShortType and ByteType separately as i get better grasp of the issue and fix.

[HyukjinKwon]

ok to test

[HyukjinKwon]

Either way seems fine to me. Let me merge this since the PR is open already.

[SparkQA]

Test build #114036 has finished for PR 26583 at commit eabfaf9.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[dongjoon-hyun]

This is revert. Merged to master.

[srowen]

Just for my info, all of the related changes in 2.4 are fully reverted now, so we can focus on master?

[dongjoon-hyun]

Yes. We checked the other TinyInt <-> ByteType mapping commits, but it's a legitimate dialect for H2 database.