Maxim Gekk created SPARK-31232:
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Summary: Specify formats of `spark.sql.session.timeZone`
Key: SPARK-31232
URL: https://issues.apache.org/jira/browse/SPARK-31232
Project: Spark
Issue Type: Documentation
Components: SQL
Affects Versions: 2.4.5, 3.0.0
Reporter: Maxim Gekk
There are two distinct types of ID (see
https://docs.oracle.com/javase/8/docs/api/java/time/ZoneId.html):
# Fixed offsets - a fully resolved offset from UTC/Greenwich, that uses the
same offset for all local date-times
# Geographical regions - an area where a specific set of rules for finding the
offset from UTC/Greenwich apply
For example three-letter time zone IDs are ambitious, and depend on the locale.
They have been already deprecated in JDK, see
https://docs.oracle.com/javase/8/docs/api/java/util/TimeZone.html :
{code}
For compatibility with JDK 1.1.x, some other three-letter time zone IDs (such
as "PST", "CTT", "AST") are also supported. However, their use is deprecated
because the same abbreviation is often used for multiple time zones (for
example, "CST" could be U.S. "Central Standard Time" and "China Standard
Time"), and the Java platform can then only recognize one of them.
{code}
The ticket aims to specify formats of the SQL config
*spark.sql.session.timeZone* in the 2 forms mentioned above.
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