HIVE-29610: Add support for SQL wildcards (% and _) in SHOW COLUMNS aligning with other SHOW commands

[Aggarwal-Raghav]

What changes were proposed in this pull request?

Check HIVE-29610

Why are the changes needed?

ShowColumnsOperation doesn't make use of UDFLike#likePatternToRegExp() and only resolve * regex pattern and not the % which was introduced in HIVE-23359.

Does this PR introduce any user-facing change?

Yes, show columns will start supporint query like SHOW COLUMNS FROM tbl LIKE 'name_%'; and will be backward compatible to support * .

How was this patch tested?

Running the following UT and cluster testing

mvn clean test -Dtest=TestMiniLlapLocalCliDriver -Dqfile=show_columns_inconsistency.q,show_columns.q -Drat.skip -Pitests -pl itests/qtest

Before

After

[Aggarwal-Raghav]

After HIVE-23359 the behaviour in Hive3 vs Hive4.0.1 for regex pattern was changed i.e. breaking change until HIVE-28292 was merged. The following overloaded method where literalize=false and greedyMatch=true there the support for * was restored. Once such example where breaking change still exists is ShowDatabasesOperation.

public static String likePatternToRegExp(String likePattern, boolean literalize, boolean greedyMatch)

In show_coloums.q SHOW SORTED COLUMNS in foo_n7 from test_db "col+"; the + doesn't work and i guess it never worked.

[Aggarwal-Raghav]

CC @wecharyu @deniskuzZ , requesting for review and feedback on the approach.

[Aggarwal-Raghav]

UT failure is un-related. will re-run post review comments

[soumyakanti3578]

Overall this looks quite good, but needs cleaning up in a few places and also needs more tests.

[Aggarwal-Raghav]

Thanks for the review @soumyakanti3578 , I've addressed the review comments.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Aggarwal-Raghav]

Have addressed the latest review comments as well @soumyakanti3578

[soumyakanti3578]

LGTM 👍🏼