[jira] [Updated] (SPARK-50666) Support hint for reading in JDBC data source

["Dongjoon Hyun (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-50666?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dongjoon Hyun updated SPARK-50666:
----------------------------------
    Summary: Support hint for reading in JDBC data source  (was: DataFrameReader supporting SQL hint)

> Support hint for reading in JDBC data source
> --------------------------------------------
>
>                 Key: SPARK-50666
>                 URL: https://issues.apache.org/jira/browse/SPARK-50666
>             Project: Spark
>          Issue Type: Sub-task
>          Components: Connect
>    Affects Versions: 4.0.0
>            Reporter: Shaojie Wu
>            Priority: Major
>              Labels: pull-request-available
>
> We're using DataFrameReader to dump data from an Oracle source, which has a huge table, and want to add hints to target generated SQL.
> Many RDBMS supports SQL hint, and it's useful for performance tuning in a data dump case.
> Can you help to improve this method?
> {code:java}
> def jdbc(
>     url: String,
>     table: String,
>     predicates: Array[String],
>     connectionProperties: Properties): DataFrame  {code}



--
This message was sent by Atlassian Jira
(v8.20.10#820010)

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