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wuyi 5eb004f4bb Revert "[SPARK-28093][SQL] Fix TRIM/LTRIM/RTRIM function parameter order issue" 
### What changes were proposed in this pull request?

This reverts commit bef5d9d6c3.

### Why are the changes needed?

Revert it according to https://github.com/apache/spark/pull/24902#issuecomment-584511167.

### Does this PR introduce any user-facing change?

No.

### How was this patch tested?

Pass Jenkins.

Closes #27540 from Ngone51/revert_spark_28093.

Lead-authored-by: wuyi <yi.wu@databricks.com>
Co-authored-by: yi.wu <yi.wu@databricks.com>
Signed-off-by: Wenchen Fan <wenchen@databricks.com>
2020-02-21 12:55:32 +08:00
..
catalyst Revert "[SPARK-28093][SQL] Fix TRIM/LTRIM/RTRIM function parameter order issue" 2020-02-21 12:55:32 +08:00
core Revert "[SPARK-28093][SQL] Fix TRIM/LTRIM/RTRIM function parameter order issue" 2020-02-21 12:55:32 +08:00
hive [SPARK-30785][SQL] Create table like should keep tracksPartitionsInCatalog same with source table 2020-02-19 15:05:34 +08:00
hive-thriftserver [SPARK-30808][SQL] Enable Java 8 time API in Thrift server 2020-02-18 02:15:44 +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-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.