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https://issues.apache.org/jira/browse/SPARK-19415?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Davies Liu resolved SPARK-19415.
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Resolution: Duplicate
Fix Version/s: 2.2.0
> Improve the implicit type conversion between numeric type and string to avoid
> precesion loss
> --------------------------------------------------------------------------------------------
>
> Key: SPARK-19415
> URL: https://issues.apache.org/jira/browse/SPARK-19415
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Davies Liu
> Fix For: 2.2.0
>
>
> Currently, Spark SQL will convert both numeric type and string into
> DoubleType, if the two children of a expression does not match (for example,
> comparing a LongType again StringType), this will cause precision loss in
> some cases.
> Some database does better job one this (for example, SQL Server [1]), we
> should follow that.
> [1] https://msdn.microsoft.com/en-us/library/ms191530.aspx
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