spark-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Kent Yao (Jira)" <j...@apache.org>
Subject [jira] [Created] (SPARK-30147) Trim the string when cast string type to booleans
Date Fri, 06 Dec 2019 08:10:00 GMT
Kent Yao created SPARK-30147:
--------------------------------

             Summary: Trim the string when cast string type to booleans
                 Key: SPARK-30147
                 URL: https://issues.apache.org/jira/browse/SPARK-30147
             Project: Spark
          Issue Type: Sub-task
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: Kent Yao


Now, we trim the string when casting string value to those `canCast` types values, e.g. int,
double, decimal, interval, date, timestamps, except for boolean. 
This behavior makes type cast and coercion inconsistency in Spark.
Not fit ANSI SQL standard either.
{code:java}
If TD is boolean, then
Case:
a) If SD is character string, then SV is replaced by
    TRIM ( BOTH ' ' FROM VE )
    Case:
    i) If the rules for literal in Subclause 5.3, “literal”, can be applied to SV to determine
a valid
value of the data type TD, then let TV be that value.
   ii) Otherwise, an exception condition is raised: data exception — invalid character value
for cast.
b) If SD is boolean, then TV is SV
{code}




--
This message was sent by Atlassian Jira
(v8.3.4#803005)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org


Mime
View raw message