Hyukjin Kwon created SPARK-19435:
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Summary: Type coercion between ArrayTypes
Key: SPARK-19435
URL: https://issues.apache.org/jira/browse/SPARK-19435
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.2.0
Reporter: Hyukjin Kwon
It seems currently we don't allow type coercion between arrays. We now
implicitly cast it in SPARK-18624
So, the below codes are not working now.
{code}
Seq(Array(1)).toDF("a").selectExpr("greatest(a, array(1D))")
Seq(Array(1)).toDF("a").selectExpr("least(a, array(1D))")
sql("SELECT * FROM values (array(0)), (array(1D)) as data(a)")
Seq(Array(1)).toDF("a").union(Seq(Array(1D)).toDF("b"))
sql("SELECT IF(1=1, array(1), array(1D))")
{code}
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