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zuotingbing f13dbb3a4e [SPARK-21604][SQL] if the object extends Logging, i suggest to remove the var LOG which is useless. 
## What changes were proposed in this pull request?

if the object extends Logging, i suggest to remove the var LOG which is useless.

## How was this patch tested?

Exist tests

Author: zuotingbing <zuo.tingbing9@zte.com.cn>

Closes #18811 from zuotingbing/SPARK-21604.
2017-08-03 10:13:52 +01:00
..
catalyst [SPARK-18950][SQL] Report conflicting fields when merging two StructTypes 2017-07-31 17:19:55 -07:00
core [SPARK-21546][SS] dropDuplicates should ignore watermark when it's not a key 2017-08-02 14:02:13 -07:00
hive [SPARK-19451][SQL] rangeBetween method should accept Long value as boundary 2017-07-29 10:11:31 -07:00
hive-thriftserver [SPARK-21604][SQL] if the object extends Logging, i suggest to remove the var LOG which is useless. 2017-08-03 10:13:52 +01:00
create-docs.sh [SPARK-21485][SQL][DOCS] Spark SQL documentation generation for built-in functions 2017-07-26 09:38:51 -07:00
gen-sql-markdown.py [SPARK-21485][SQL][DOCS] Spark SQL documentation generation for built-in functions 2017-07-26 09:38:51 -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.