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Dilip Biswal e4f5036146 [SPARK-32020][SQL] Better error message when SPARK_HOME or spark.test.home is not set 
### What changes were proposed in this pull request?
Better error message when SPARK_HOME or spark,test.home is not set.

### Why are the changes needed?
Currently the error message is not easily consumable as it prints  (see below) the real error after printing the current environment which is rather long.

**Old output**
`
 time.name" -> "Java(TM) SE Runtime Environment", "sun.boot.library.path" -> "/Library/Java/JavaVirtualMachines/jdk1.8.0_221.jdk/Contents/Home/jre/lib",
 "java.vm.version" -> "25.221-b11",
 . . .
 . . .
 . . .
) did not contain key "SPARK_HOME" spark.test.home or SPARK_HOME is not set.
	at org.scalatest.Assertions.newAssertionFailedExceptio
`

**New output**
An exception or error caused a run to abort: spark.test.home or SPARK_HOME is not set.
org.scalatest.exceptions.TestFailedException: spark.test.home or SPARK_HOME is not set
### Does this PR introduce any user-facing change?
`
No.

### How was this patch tested?
Ran the tests in intellej  manually to see the new error.

Closes #28825 from dilipbiswal/minor-spark-31950-followup.

Authored-by: Dilip Biswal <dkbiswal@gmail.com>
Signed-off-by: HyukjinKwon <gurwls223@apache.org>
2020-06-18 22:45:55 +09:00
..
catalyst [SPARK-32020][SQL] Better error message when SPARK_HOME or spark.test.home is not set 2020-06-18 22:45:55 +09:00
core [SPARK-32020][SQL] Better error message when SPARK_HOME or spark.test.home is not set 2020-06-18 22:45:55 +09:00
hive [SPARK-31710][SQL] Fail casting numeric to timestamp by default 2020-06-16 08:35:35 +00:00
hive-thriftserver [SPARK-32006][SQL] Create date/timestamp formatters once before collect in hiveResultString() 2020-06-17 06:28:47 +00:00
create-docs.sh [SPARK-31550][SQL][DOCS] Set nondeterministic configurations with general meanings in sql configuration doc 2020-04-27 17:08:52 +09:00
gen-sql-api-docs.py [SPARK-31474][SQL][FOLLOWUP] Replace _FUNC_ placeholder with functionname in the note field of expression info 2020-04-23 13:33:04 +09:00
gen-sql-config-docs.py [SPARK-31550][SQL][DOCS] Set nondeterministic configurations with general meanings in sql configuration doc 2020-04-27 17:08:52 +09:00
gen-sql-functions-docs.py [SPARK-31562][SQL] Update ExpressionDescription for substring, current_date, and current_timestamp 2020-04-26 11:46:52 -07:00
mkdocs.yml [SPARK-30731] Update deprecated Mkdocs option 2020-02-19 17:28:58 +09:00
README.md [SPARK-30510][SQL][DOCS] Publicly document Spark SQL configuration options 2020-02-09 19:20:47 +09:00

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, and SQL configuration documentation that gets included as part of configuration.md in the main docs directory.