Maxim Gekk created SPARK-29371:
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Summary: Support interval field values with fractional parts
Key: SPARK-29371
URL: https://issues.apache.org/jira/browse/SPARK-29371
Project: Spark
Issue Type: Sub-task
Components: SQL
Affects Versions: 3.0.0
Reporter: Maxim Gekk
In PostgreSQL, field values can have fractional parts; for example '1.5 week'
or '01:02:03.45'. Such input is converted to the appropriate number of months,
days, and seconds for storage. When this would result in a fractional number of
months or days, the fraction is added to the lower-order fields using the
conversion factors 1 month = 30 days and 1 day = 24 hours. For example, '1.5
month' becomes 1 month and 15 days. Only seconds will ever be shown as
fractional on output. See
https://www.postgresql.org/docs/current/datatype-datetime.html#DATATYPE-INTERVAL-INPUT
For example:
{code}
maxim=# SELECT INTERVAL '1.5 months' AS "One month 15 days";
One month 15 days
-------------------
1 mon 15 days
(1 row)
{code}
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