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Cheng Su a916690dd9 [SPARK-34681][SQL] Fix bug for full outer shuffled hash join when building left side with non-equal condition 
### What changes were proposed in this pull request?

For full outer shuffled hash join with building hash map on left side, and having non-equal condition, the join can produce wrong result.

The root cause is `boundCondition` in `HashJoin.scala` always assumes the left side row is `streamedPlan` and right side row is `buildPlan` ([streamedPlan.output ++ buildPlan.output](https://github.com/apache/spark/blob/branch-3.1/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashJoin.scala#L141)). This is valid assumption, except for full outer + build left case.

The fix is to correct `boundCondition` in `HashJoin.scala` to handle full outer + build left case properly. See reproduce in https://issues.apache.org/jira/browse/SPARK-32399?focusedCommentId=17298414&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-17298414 .

### Why are the changes needed?

Fix data correctness bug.

### Does this PR introduce _any_ user-facing change?

No.

### How was this patch tested?

Changed the test in `OuterJoinSuite.scala` to cover full outer shuffled hash join.
Before this change, the unit test `basic full outer join using ShuffledHashJoin` in `OuterJoinSuite.scala` is failed.

Closes #31792 from c21/join-bugfix.

Authored-by: Cheng Su <chengsu@fb.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>
2021-03-09 22:55:27 -08:00
..
catalyst [SPARK-33498][SQL][TESTS][FOLLOWUP] Remove SQLConf.withExistingConf in CastSuite 2021-03-08 23:52:43 -08:00
core [SPARK-34681][SQL] Fix bug for full outer shuffled hash join when building left side with non-equal condition 2021-03-09 22:55:27 -08:00
hive [SPARK-34603][SQL] Support ADD ARCHIVE and LIST ARCHIVES command 2021-03-09 21:28:35 +09:00
hive-thriftserver [SPARK-34373][SQL] HiveThriftServer2 startWithContext may hang with a race issue 2021-02-21 17:37:12 +09:00
create-docs.sh [SPARK-34010][SQL][DODCS] Use python3 instead of python in SQL documentation build 2021-01-05 19:48:10 +09:00
gen-sql-api-docs.py [SPARK-34022][DOCS][FOLLOW-UP] Fix typo in SQL built-in function docs 2021-01-06 09:28:22 -08:00
gen-sql-config-docs.py [SPARK-31550][SQL][DOCS] Set nondeterministic configurations with general meanings in sql configuration doc 2020-04-27 17:08:52 +09:00
gen-sql-functions-docs.py [SPARK-31562][SQL] Update ExpressionDescription for substring, current_date, and current_timestamp 2020-04-26 11:46:52 -07:00
mkdocs.yml [SPARK-30731] Update deprecated Mkdocs option 2020-02-19 17:28:58 +09:00
README.md [SPARK-30510][SQL][DOCS] Publicly document Spark SQL configuration options 2020-02-09 19:20:47 +09:00

README.md

Spark SQL

This module provides support for executing relational queries expressed in either SQL or the DataFrame/Dataset API.

Spark SQL is broken up into four subprojects:

  • Catalyst (sql/catalyst) - An implementation-agnostic framework for manipulating trees of relational operators and expressions.
  • Execution (sql/core) - A query planner / execution engine for translating Catalyst's logical query plans into Spark RDDs. This component also includes a new public interface, SQLContext, that allows users to execute SQL or LINQ statements against existing RDDs and Parquet files.
  • Hive Support (sql/hive) - Includes extensions that allow users to write queries using a subset of HiveQL and access data from a Hive Metastore using Hive SerDes. There are also wrappers that allow users to run queries that include Hive UDFs, UDAFs, and UDTFs.
  • HiveServer and CLI support (sql/hive-thriftserver) - Includes support for the SQL CLI (bin/spark-sql) and a HiveServer2 (for JDBC/ODBC) compatible server.

Running ./sql/create-docs.sh generates SQL documentation for built-in functions under sql/site, and SQL configuration documentation that gets included as part of configuration.md in the main docs directory.