[SPARK-28326][SQL][TEST] Port join.sql

[wangyum]

What changes were proposed in this pull request?

This PR is to port join.sql from PostgreSQL regression tests. https://github.com/postgres/postgres/blob/REL_12_BETA2/src/test/regress/sql/join.sql

The expected results can be found in the link: https://github.com/postgres/postgres/blob/REL_12_BETA2/src/test/regress/expected/join.out

When porting the test cases, found nine PostgreSQL specific features that do not exist in Spark SQL:
SPARK-27877: ANSI SQL: LATERAL derived table(T491)
SPARK-20856: support statement using nested joins
SPARK-27987: Support POSIX Regular Expressions
SPARK-28382: Array Functions: unnest
SPARK-25411: Implement range partition in Spark
SPARK-28377: Fully support correlation names in the FROM clause
SPARK-28330: Enhance query limit
SPARK-28379: Correlated scalar subqueries must be aggregated
SPARK-16452: basic INFORMATION_SCHEMA support

How was this patch tested?

N/A

[SparkQA]

Test build #107639 has finished for PR 25148 at commit 3942d87.

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

[SparkQA]

Test build #107645 has finished for PR 25148 at commit f329e6d.

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

[dongjoon-hyun]

Retest this please.

[SparkQA]

Test build #108258 has finished for PR 25148 at commit f329e6d.

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

[dongjoon-hyun]

From the PR description, please replace numeric.sql with join.sql.

This PR is to port numeric.sql from PostgreSQL regression tests.

[SparkQA]

Test build #108332 has finished for PR 25148 at commit 12ff0b2.

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

[maropu]

It seems like there is no problem in the output (I checked the answers between Spark and PostgreSQL as much as possible though, its too big to check one-by-one...)

[wangyum]

Thank you @maropu

[SparkQA]

Test build #108363 has finished for PR 25148 at commit 6261c87.

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

[dongjoon-hyun]

+1, LGTM. Thank you, @wangyum and @maropu .
Merged to master.