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Wenchen Fan dfd5237c0c [SPARK-36783][SQL] ScanOperation should not push Filter through nondeterministic Project 
### What changes were proposed in this pull request?

`ScanOperation` collects adjacent Projects and Filters. The caller side always assume that the collected Filters should run before collected Projects, which means `ScanOperation` effectively pushes Filter through Project.

Following `PushPredicateThroughNonJoin`, we should not push Filter through nondeterministic Project. This PR fixes `ScanOperation` to follow this rule.

### Why are the changes needed?

Fix a bug that violates the semantic of nondeterministic expressions.

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

Most likely no change, but in some cases, this is a correctness bug fix which changes the query result.

### How was this patch tested?

existing tests

Closes #34023 from cloud-fan/scan.

Authored-by: Wenchen Fan <wenchen@databricks.com>
Signed-off-by: Wenchen Fan <wenchen@databricks.com>
2021-09-17 10:51:15 +08:00
..
catalyst [SPARK-36783][SQL] ScanOperation should not push Filter through nondeterministic Project 2021-09-17 10:51:15 +08:00
core [SPARK-36773][SQL][TEST] Fixed unit test to check the compression for parquet 2021-09-17 11:25:09 +09:00
hive [SPARK-36774][CORE][TESTS] Move SparkSubmitTestUtils to core module and use it in SparkSubmitSuite 2021-09-16 14:28:47 -07:00
hive-thriftserver [SPARK-36774][CORE][TESTS] Move SparkSubmitTestUtils to core module and use it in SparkSubmitSuite 2021-09-16 14:28:47 -07:00
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-34747][SQL][DOCS] Add virtual operators to the built-in function document 2021-03-19 10:19:26 +09:00
gen-sql-config-docs.py [SPARK-36657][SQL] Update comment in 'gen-sql-config-docs.py' 2021-09-02 18:50:59 -07:00
gen-sql-functions-docs.py
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.