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Niranjan Padmanabhan a1e40b1f5d
[MINOR][DOCS] Remove consecutive duplicated words/typo in Spark Repo 
## What changes were proposed in this pull request?
There are many locations in the Spark repo where the same word occurs consecutively. Sometimes they are appropriately placed, but many times they are not. This PR removes the inappropriately duplicated words.

## How was this patch tested?
N/A since only docs or comments were updated.

Author: Niranjan Padmanabhan <niranjan.padmanabhan@gmail.com>

Closes #16455 from neurons/np.structure_streaming_doc.
2017-01-04 15:07:29 +00:00
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catalyst [MINOR][DOCS] Remove consecutive duplicated words/typo in Spark Repo 2017-01-04 15:07:29 +00:00
core [MINOR][DOCS] Remove consecutive duplicated words/typo in Spark Repo 2017-01-04 15:07:29 +00:00
hive [MINOR][DOCS] Remove consecutive duplicated words/typo in Spark Repo 2017-01-04 15:07:29 +00:00
hive-thriftserver [MINOR][DOCS] Remove consecutive duplicated words/typo in Spark Repo 2017-01-04 15:07:29 +00:00
README.md [SPARK-16557][SQL] Remove stale doc in sql/README.md 2016-07-14 19:24:42 -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.