Maxim Gekk created SPARK-24571:
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Summary: Support literals with values of the Char type
Key: SPARK-24571
URL: https://issues.apache.org/jira/browse/SPARK-24571
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.3.1
Reporter: Maxim Gekk
Currently, Spark doesn't support literals with the Char (java.lang.Character)
type. For example, the following code throws an exception:
{code:scala}
val df = Seq("Amsterdam", "San Francisco", "London").toDF("city")
df.where($"city".contains('o')).show(false)
{code}
It fails with the exception:
{code}
Unsupported literal type class java.lang.Character o
java.lang.RuntimeException: Unsupported literal type class java.lang.Character p
at org.apache.spark.sql.catalyst.expressions.Literal$.apply(literals.scala:78)
{code}
One of the possible solutions can be automatic conversion of Char literal to
String literal of length 1.
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