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Kent Yao 1b553da2a1 [SPARK-34908][SQL][TESTS] Add test cases for char and varchar with functions 
### What changes were proposed in this pull request?

Using char and varchar with the string functions and some other expressions might be confusing and ambiguous. In this PR we add test cases for char and varchar with these operations to reveal these behavior and see if we can come up with a general pattern for them.

### Why are the changes needed?

test coverage

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

no

### How was this patch tested?

new tests

Closes #32010 from yaooqinn/SPARK-34908.

Authored-by: Kent Yao <yao@apache.org>
Signed-off-by: HyukjinKwon <gurwls223@apache.org>
2021-04-01 16:33:30 +09:00
..
catalyst [SPARK-34903][SQL] Return day-time interval from timestamps subtraction 2021-04-01 10:27:58 +03:00
core [SPARK-34908][SQL][TESTS] Add test cases for char and varchar with functions 2021-04-01 16:33:30 +09:00
hive [SPARK-34568][SQL] When SparkContext's conf not enable hive, we should respect enableHiveSupport() when build SparkSession too 2021-03-31 05:59:24 +00:00
hive-thriftserver [SPARK-34896][SQL] Return day-time interval from dates subtraction 2021-03-31 08:20:13 +03:00
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
README.md

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.