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Kousuke Saruta 07ee73234f [SPARK-34747][SQL][DOCS] Add virtual operators to the built-in function document 
### What changes were proposed in this pull request?

This PR fix an issue that virtual operators (`||`, `!=`, `<>`, `between` and `case`) are absent from the Spark SQL Built-in functions document.

### Why are the changes needed?

The document should explain about all the supported built-in operators.

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

No.

### How was this patch tested?

Built the document with `SKIP_SCALADOC=1 SKIP_RDOC=1 SKIP_PYTHONDOC=1 bundler exec jekyll build` and then, confirmed the document.

![neq1](https://user-images.githubusercontent.com/4736016/111192859-e2e76380-85fc-11eb-89c9-75916a5e856a.png)
![neq2](https://user-images.githubusercontent.com/4736016/111192874-e7ac1780-85fc-11eb-9a9b-c504265b373f.png)
![between](https://user-images.githubusercontent.com/4736016/111192898-eda1f880-85fc-11eb-992d-cf80c544ec27.png)
![case](https://user-images.githubusercontent.com/4736016/111192918-f266ac80-85fc-11eb-9306-5dbc413a0cdb.png)
![double_pipe](https://user-images.githubusercontent.com/4736016/111192952-fb577e00-85fc-11eb-932e-385e5c2a5205.png)

Closes #31841 from sarutak/builtin-op-doc.

Authored-by: Kousuke Saruta <sarutak@oss.nttdata.com>
Signed-off-by: HyukjinKwon <gurwls223@apache.org>
2021-03-19 10:19:26 +09:00
..
catalyst [SPARK-34741][SQL] MergeIntoTable should avoid ambiguous reference in UpdateAction 2021-03-18 15:54:41 +08:00
core [SPARK-34747][SQL][DOCS] Add virtual operators to the built-in function document 2021-03-19 10:19:26 +09:00
hive [SPARK-34728][SQL] Remove all SQLConf.get if extends from SQLConfHelper 2021-03-18 15:04:41 +09:00
hive-thriftserver [SPARK-34762][BUILD] Fix the build failure with Scala 2.13 which is related to commons-cli 2021-03-18 12:31:50 +09:00
create-docs.sh [SPARK-34010][SQL][DODCS] Use python3 instead of python in SQL documentation build 2021-01-05 19:48:10 +09:00
gen-sql-api-docs.py [SPARK-34747][SQL][DOCS] Add virtual operators to the built-in function document 2021-03-19 10:19:26 +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.