c0b7424eca
## What changes were proposed in this pull request? Modified HiveExternalCatalogVersionsSuite.scala to use Utils.doFetchFile to download different versions of Spark binaries rather than launching wget as an external process. On platforms that don't have wget installed, this suite fails with an error. cloud-fan : would you like to check this change? ## How was this patch tested? 1) test-only of HiveExternalCatalogVersionsSuite on several platforms. Tested bad mirror, read timeout, and redirects. 2) ./dev/run-tests Author: Bruce Robbins <bersprockets@gmail.com> Closes #20147 from bersprockets/SPARK-22940-alt. |
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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 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
.