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Posted to issues@spark.apache.org by "Dongjoon Hyun (Jira)" <ji...@apache.org> on 2020/03/29 02:07:00 UTC
[jira] [Updated] (SPARK-29842) PostgreSQL dialect: cast to double
[ https://issues.apache.org/jira/browse/SPARK-29842?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dongjoon Hyun updated SPARK-29842:
----------------------------------
Affects Version/s: (was: 3.0.0)
3.1.0
> PostgreSQL dialect: cast to double
> ----------------------------------
>
> Key: SPARK-29842
> URL: https://issues.apache.org/jira/browse/SPARK-29842
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: jobit mathew
> Priority: Major
>
> Make SparkSQL's cast to double behavior be consistent with PostgreSQL when
> spark.sql.dialect is configured as PostgreSQL.
> some examples
> {code:java}
> spark-sql> select CAST ('10.2' AS DOUBLE PRECISION);
> Error in query:
> extraneous input 'PRECISION' expecting ')'(line 1, pos 30)
> == SQL ==
> select CAST ('10.2' AS DOUBLE PRECISION)
> ------------------------------^^^
> spark-sql> select CAST ('10.2' AS DOUBLE PRECISION);
> Error in query:
> extraneous input 'PRECISION' expecting ')'(line 1, pos 30)
> == SQL ==
> select CAST ('10.2' AS DOUBLE PRECISION)
> ------------------------------^^^
> spark-sql> select CAST ('10.2' AS DOUBLE);
> 10.2
> Time taken: 0.08 seconds, Fetched 1 row(s)
> spark-sql> select CAST ('10.222222222222' AS DOUBLE);
> 10.222222222222
> Time taken: 0.08 seconds, Fetched 1 row(s)
> spark-sql> select CAST ('ff' AS DOUBLE);
> NULL
> Time taken: 0.08 seconds, Fetched 1 row(s)
> spark-sql> select CAST ('11111111111111111' AS DOUBLE);
> 1.1111111111111112E16
> Time taken: 0.067 seconds, Fetched 1 row(s)
> spark-sql>
> {code}
> Postgresql
> select CAST ('10.22222222222' AS DOUBLE PRECISION);
> select CAST ('11111111111111111' AS DOUBLE PRECISION);
> select CAST ('ff' AS DOUBLE PRECISION);
>
>
> || ||float8||
> |1|10,22222222222|
>
> || ||float8||
> |1|1,11111111111111E+16|
> Error(s), warning(s):
> 22P02: invalid input syntax for type double precision: "ff"
>
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