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Huaxin Gao b1f522cf97 [SPARK-34952][SQL] DSv2 Aggregate push down APIs 
### What changes were proposed in this pull request?
Add interfaces and APIs to push down Aggregates to V2 Data Source

### Why are the changes needed?
improve performance

### Does this PR introduce _any_ user-facing change?
SQLConf.PARQUET_AGGREGATE_PUSHDOWN_ENABLED was added. If this is set to true, Aggregates are pushed down to Data Source.

### How was this patch tested?
New tests were added to test aggregates push down in https://github.com/apache/spark/pull/32049.  The original PR is split into two PRs. This PR doesn't contain new tests.

Closes #33352 from huaxingao/aggPushDownInterface.

Authored-by: Huaxin Gao <huaxin_gao@apple.com>
Signed-off-by: Wenchen Fan <wenchen@databricks.com>
(cherry picked from commit c561ee6865)
Signed-off-by: Wenchen Fan <wenchen@databricks.com>
2021-07-26 16:01:43 +08:00
..
catalyst [SPARK-34952][SQL] DSv2 Aggregate push down APIs 2021-07-26 16:01:43 +08:00
core [SPARK-34952][SQL] DSv2 Aggregate push down APIs 2021-07-26 16:01:43 +08:00
hive [SPARK-28266][SQL] convertToLogicalRelation should not interpret path property when reading Hive tables 2021-07-21 22:40:59 +08:00
hive-thriftserver [SPARK-36179][SQL] Support TimestampNTZType in SparkGetColumnsOperation 2021-07-20 09:49:25 +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-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-32194][PYTHON] Use proper exception classes instead of plain Exception 2021-05-26 11:54:40 +09:00
gen-sql-functions-docs.py
mkdocs.yml
README.md

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.