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Yuanjian Li a6b91d2bf7 [SPARK-30556][SQL][FOLLOWUP] Reset the status changed in SQLExecution.withThreadLocalCaptured 
### What changes were proposed in this pull request?
Follow up for #27267, reset the status changed in SQLExecution.withThreadLocalCaptured.

### Why are the changes needed?
For code safety.

### Does this PR introduce any user-facing change?
No.

### How was this patch tested?
Existing UT.

Closes #27516 from xuanyuanking/SPARK-30556-follow.

Authored-by: Yuanjian Li <xyliyuanjian@gmail.com>
Signed-off-by: herman <herman@databricks.com>
2020-02-10 22:16:25 +01:00
..
catalyst [SPARK-30759][SQL] Initialize cache for foldable patterns in StringRegexExpression 2020-02-10 12:51:37 -08:00
core [SPARK-30556][SQL][FOLLOWUP] Reset the status changed in SQLExecution.withThreadLocalCaptured 2020-02-10 22:16:25 +01:00
hive [SPARK-30612][SQL] Resolve qualified column name with v2 tables 2020-02-06 13:54:17 +08:00
hive-thriftserver [SPARK-29543][SS][UI] Structured Streaming Web UI 2020-01-29 13:43:51 -08:00
create-docs.sh [SPARK-30510][SQL][DOCS] Publicly document Spark SQL configuration options 2020-02-09 19:20:47 +09:00
gen-sql-api-docs.py [SPARK-30510][SQL][DOCS] Publicly document Spark SQL configuration options 2020-02-09 19:20:47 +09:00
gen-sql-config-docs.py [SPARK-30510][SQL][DOCS] Publicly document Spark SQL configuration options 2020-02-09 19:20:47 +09:00
mkdocs.yml [SPARK-21485][SQL][DOCS] Spark SQL documentation generation for built-in functions 2017-07-26 09:38:51 -07:00
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.