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Bryan Cutler 59d52631eb [SPARK-22324][SQL][PYTHON] Upgrade Arrow to 0.8.0 
## What changes were proposed in this pull request?

Upgrade Spark to Arrow 0.8.0 for Java and Python.  Also includes an upgrade of Netty to 4.1.17 to resolve dependency requirements.

The highlights that pertain to Spark for the update from Arrow versoin 0.4.1 to 0.8.0 include:

* Java refactoring for more simple API
* Java reduced heap usage and streamlined hot code paths
* Type support for DecimalType, ArrayType
* Improved type casting support in Python
* Simplified type checking in Python

## How was this patch tested?

Existing tests

Author: Bryan Cutler <cutlerb@gmail.com>
Author: Shixiong Zhu <zsxwing@gmail.com>

Closes #19884 from BryanCutler/arrow-upgrade-080-SPARK-22324.
2017-12-21 20:43:56 +09:00
..
catalyst [SPARK-22848][SQL] Eliminate mutable state from Stack 2017-12-21 14:54:38 +08:00
core [SPARK-22324][SQL][PYTHON] Upgrade Arrow to 0.8.0 2017-12-21 20:43:56 +09:00
hive [SPARK-22745][SQL] read partition stats from Hive 2017-12-13 16:27:29 +08:00
hive-thriftserver Revert "Revert "[SPARK-22496][SQL] thrift server adds operation logs"" 2017-12-19 07:30:29 +09:00
create-docs.sh [MINOR][DOCS] Minor doc fixes related with doc build and uses script dir in SQL doc gen script 2017-08-26 13:56:24 +09:00
gen-sql-markdown.py [SPARK-21485][FOLLOWUP][SQL][DOCS] Describes examples and arguments separately, and note/since in SQL built-in function documentation 2017-08-05 10:10:56 -07:00
mkdocs.yml [SPARK-21485][SQL][DOCS] Spark SQL documentation generation for built-in functions 2017-07-26 09:38:51 -07:00
README.md [SPARK-21485][SQL][DOCS] Spark SQL documentation generation for built-in functions 2017-07-26 09:38:51 -07:00

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 an extension of SQLContext called HiveContext that allows users to write queries using a subset of HiveQL and access data from a Hive Metastore using Hive SerDes. There are also wrappers that allows 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.