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yi.wu 34be83e08b
[SPARK-31037][SQL][FOLLOW-UP] Replace legacy ReduceNumShufflePartitions with CoalesceShufflePartitions in comment 
### What changes were proposed in this pull request?

Replace legacy `ReduceNumShufflePartitions` with `CoalesceShufflePartitions` in comment.

### Why are the changes needed?

Rule `ReduceNumShufflePartitions` has renamed to `CoalesceShufflePartitions`, we should update related comment as well.

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

No.

### How was this patch tested?

N/A.

Closes #27865 from Ngone51/spark_31037_followup.

Authored-by: yi.wu <yi.wu@databricks.com>
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>
2020-03-10 11:09:36 -07:00
..
catalyst [SPARK-30189][SQL] Interval from year-month/date-time string should handle whitespaces 2020-03-10 22:08:58 +08:00
core [SPARK-31037][SQL][FOLLOW-UP] Replace legacy ReduceNumShufflePartitions with CoalesceShufflePartitions in comment 2020-03-10 11:09:36 -07:00
hive [SPARK-31061][SQL] Provide ability to alter the provider of a table 2020-03-05 23:42:07 -08:00
hive-thriftserver [SPARK-30049][SQL] SQL fails to parse when comment contains an unmatched quote character 2020-03-03 09:55:15 -06:00
create-docs.sh [SPARK-30510][SQL][DOCS] Publicly document Spark SQL configuration options 2020-02-09 19:20:47 +09:00
gen-sql-api-docs.py [SPARK-30510][SQL][DOCS] Publicly document Spark SQL configuration options 2020-02-09 19:20:47 +09:00
gen-sql-config-docs.py [SPARK-30840][CORE][SQL] Add version property for ConfigEntry and ConfigBuilder 2020-02-22 09:46:42 +09:00
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.