cec9604eae
### What changes were proposed in this pull request? In the PR, I propose to add a few `ZoneId` constant values to the `DateTimeTestUtils` object, and reuse the constants in tests. Proposed the following constants: - PST = -08:00 - UTC = +00:00 - CEST = +02:00 - CET = +01:00 - JST = +09:00 - MIT = -09:30 - LA = America/Los_Angeles ### Why are the changes needed? All proposed constant values (except `LA`) are initialized by zone offsets according to their definitions. This will allow to avoid: - Using of 3-letter time zones that have been already deprecated in JDK, see _Three-letter time zone IDs_ in https://docs.oracle.com/javase/8/docs/api/java/util/TimeZone.html - Incorrect mapping of 3-letter time zones to zone offsets, see SPARK-31237. For example, `PST` is mapped to `America/Los_Angeles` instead of the `-08:00` zone offset. Also this should improve stability and maintainability of test suites. ### Does this PR introduce any user-facing change? No ### How was this patch tested? By running affected test suites. Closes #28001 from MaxGekk/replace-pst. Authored-by: Maxim Gekk <max.gekk@gmail.com> Signed-off-by: Wenchen Fan <wenchen@databricks.com> |
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.. | ||
catalyst | ||
core | ||
hive | ||
hive-thriftserver | ||
create-docs.sh | ||
gen-sql-api-docs.py | ||
gen-sql-config-docs.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
, and SQL configuration documentation that gets included as part of configuration.md
in the main docs
directory.