9a46702791
### What changes were proposed in this pull request? ``` hive> select version(); OK 3.1.1 rf4e0529634b6231a0072295da48af466cf2f10b7 Time taken: 2.113 seconds, Fetched: 1 row(s) ``` ### Why are the changes needed? From hive behavior and I guess it is useful for debugging and developing etc. ### Does this PR introduce any user-facing change? add a misc func ### How was this patch tested? add ut Closes #26209 from yaooqinn/SPARK-29554. Authored-by: Kent Yao <yaooqinn@hotmail.com> Signed-off-by: Dongjoon Hyun <dhyun@apple.com> |
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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 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
.