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Liang-Chi Hsieh e10b8741d8 [SPARK-16622][SQL] Fix NullPointerException when the returned value of the called method in Invoke is null 
## What changes were proposed in this pull request?

Currently we don't check the value returned by called method in `Invoke`. When the returned value is null and is assigned to a variable of primitive type, `NullPointerException` will be thrown.

## How was this patch tested?

Jenkins tests.

Author: Liang-Chi Hsieh <simonh@tw.ibm.com>

Closes #14259 from viirya/agg-empty-ds.
2016-07-23 10:27:16 +08:00
..
catalyst [SPARK-16622][SQL] Fix NullPointerException when the returned value of the called method in Invoke is null 2016-07-23 10:27:16 +08:00
core [SPARK-16556][SPARK-16559][SQL] Fix Two Bugs in Bucket Specification 2016-07-22 13:27:17 +08:00
hive [SPARK-16287][SQL] Implement str_to_map SQL function 2016-07-22 10:05:21 +08:00
hive-thriftserver [SPARK-16535][BUILD] In pom.xml, remove groupId which is redundant definition and inherited from the parent 2016-07-19 11:59:46 +01:00
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.