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angerszhu cc852d4eec [SPARK-29015][SQL][TEST-HADOOP3.2] Reset class loader after initializing SessionState for built-in Hive 2.3 
### What changes were proposed in this pull request?

Hive 2.3 will set a new UDFClassLoader to hiveConf.classLoader when initializing SessionState since HIVE-11878,  and
1. ADDJarCommand will add jars to clientLoader.classLoader.
2. --jar passed jar will be added to clientLoader.classLoader
3.  jar passed by hive conf  `hive.aux.jars`  [SPARK-28954](https://github.com/apache/spark/pull/25653) [SPARK-28840](https://github.com/apache/spark/pull/25542) will be added to clientLoader.classLoader too

For these  reason we cannot load the jars added by ADDJarCommand because of class loader got changed. We reset it to clientLoader.ClassLoader here.

### Why are the changes needed?
support for jdk11

### Does this PR introduce any user-facing change?
NO

### How was this patch tested?
UT
```
export JAVA_HOME=/usr/lib/jdk-11.0.3
export PATH=$JAVA_HOME/bin:$PATH

build/sbt -Phive-thriftserver -Phadoop-3.2

hive/test-only *HiveSparkSubmitSuite -- -z "SPARK-8368: includes jars passed in through --jars"
hive-thriftserver/test-only *HiveThriftBinaryServerSuite -- -z "test add jar"
```

Closes #25775 from AngersZhuuuu/SPARK-29015-STS-JDK11.

Authored-by: angerszhu <angers.zhu@gmail.com>
Signed-off-by: Sean Owen <sean.owen@databricks.com>
2019-09-27 10:23:56 -05:00
..
catalyst [SPARK-21914][SQL][TESTS] Check results of expression examples 2019-09-27 21:30:37 +09:00
core [SPARK-21914][SQL][TESTS] Check results of expression examples 2019-09-27 21:30:37 +09:00
hive [SPARK-29015][SQL][TEST-HADOOP3.2] Reset class loader after initializing SessionState for built-in Hive 2.3 2019-09-27 10:23:56 -05:00
hive-thriftserver [SPARK-28997][SQL] Add spark.sql.dialect 2019-09-26 21:00:27 +08:00
create-docs.sh
gen-sql-markdown.py [SPARK-27328][SQL] Add 'deprecated' in ExpressionDescription for extended usage and SQL doc 2019-04-09 13:49:42 +08:00
mkdocs.yml
README.md [SPARK-28980][CORE][SQL][STREAMING][MLLIB] Remove most items deprecated in Spark 2.2.0 or earlier, for Spark 3 2019-09-09 10:19:40 -05:00

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 extensions that allow users to write queries using a subset of HiveQL and access data from a Hive Metastore using Hive SerDes. There are also wrappers that allow 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.