Resolves: #22227

[PUSHKAR99055]

Description

I have modified the getColumnType method in the ResultSetMetadata class to ensure that the type names returned are in lowercase. This change addresses the inconsistency between the system.jdbc.types table, which stores type names in lowercase, and the ResultSetMetadata.getColumnTypeName method, which previously returned type names in uppercase.

Motivation and Context

This change is required to fix the capitalization inconsistency between the `DatabaseMetadata.getTypeInfo` method and the `ResultSetMetadata.getColumnTypeName` method. By ensuring consistent lowercase type names, we avoid potential issues and improve data consistency. This fixes issue #22227.

https://github.com/prestodb/presto/issues/22227

Impact

This change does not introduce any new public API or user-facing features. It ensures internal consistency of type names in the system. There is no significant performance impact expected from this change.

Test Plan

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• [x] Please make sure your submission complies with our development, formatting, commit message, and attribution guidelines.
• [x] PR description addresses the issue accurately and concisely. If the change is non-trivial, a GitHub Issue is referenced.
• [ ] Documented new properties (with its default value), SQL syntax, functions, or other functionality.
• [ ] If release notes are required, they follow the release notes guidelines.
• [ ] Adequate tests were added if applicable.
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Release Notes

Please follow release notes guidelines and fill in the release notes below.

== RELEASE NOTES ==

General Changes
Fixed capitalization issue in `ResultSetMetadata.getColumnType` to return type names in lowercase, ensuring consistency with `system.jdbc.types` table. :pr:`12345`

== NO RELEASE NOTE ==

[linux-foundation-easycla[bot]]

• :white_check_mark:login: PUSHKAR99055 / (7ed11077d24a39108a9fd20f6dff704ecb44c19e)

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Suggest nit in release note entry, adding this PR number to it

== RELEASE NOTES ==

General Changes
Fix capitalization issue in `ResultSetMetadata.getColumnType` to return type names in lowercase, ensuring consistency with `system.jdbc.types` table. :pr:`23065`