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Kunal Khamar 2d73fcced0 [SPARK-20051][SS] Fix StreamSuite flaky test - recover from v2.1 checkpoint 
## What changes were proposed in this pull request?

There is a race condition between calling stop on a streaming query and deleting directories in `withTempDir` that causes test to fail, fixing to do lazy deletion using delete on shutdown JVM hook.

## How was this patch tested?

- Unit test
  - repeated 300 runs with no failure

Author: Kunal Khamar <kkhamar@outlook.com>

Closes #17382 from kunalkhamar/partition-bugfix.
2017-03-21 18:56:14 -07:00
..
catalyst [SPARK-20017][SQL] change the nullability of function 'StringToMap' from 'false' to 'true' 2017-03-21 11:30:55 -07:00
core [SPARK-20051][SS] Fix StreamSuite flaky test - recover from v2.1 checkpoint 2017-03-21 18:56:14 -07:00
hive [SPARK-19261][SQL] Alter add columns for Hive serde and some datasource tables 2017-03-21 08:49:54 -07:00
hive-thriftserver [SPARK-19673][SQL] "ThriftServer default app name is changed wrong" 2017-02-25 21:47:02 +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.