031910b0ec
## What changes were proposed in this pull request? Window rangeBetween() API should allow literal boundary, that means, the window range frame can calculate frame of double/date/timestamp. Example of the use case can be: ``` SELECT val_timestamp, cate, avg(val_timestamp) OVER(PARTITION BY cate ORDER BY val_timestamp RANGE BETWEEN CURRENT ROW AND interval 23 days 4 hours FOLLOWING) FROM testData ``` This PR refactors the Window `rangeBetween` and `rowsBetween` API, while the legacy user code should still be valid. ## How was this patch tested? Add new test cases both in `DataFrameWindowFunctionsSuite` and in `window.sql`. Author: Xingbo Jiang <xingbo.jiang@databricks.com> Closes #18814 from jiangxb1987/literal-boundary. |
||
---|---|---|
.. | ||
catalyst | ||
core | ||
hive | ||
hive-thriftserver | ||
create-docs.sh | ||
gen-sql-markdown.py | ||
mkdocs.yml | ||
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 an extension of SQLContext called HiveContext that allows users to write queries using a subset of HiveQL and access data from a Hive Metastore using Hive SerDes. There are also wrappers that allows 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
.