Robert Joseph Evans created SPARK-38604:
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Summary: ceil and floor return different types when called from
scala than sql
Key: SPARK-38604
URL: https://issues.apache.org/jira/browse/SPARK-38604
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 3.3.0
Reporter: Robert Joseph Evans
In Spark 3.3.0 SPARK-37475
[PR|http://example.com/][https://github.com/apache/spark/pull/34729] went in
and added support for a scale parameter to floor and ceil. There was
[discussion|https://github.com/apache/spark/pull/34729#discussion_r761157050]
about potential incompatibilities, specifically with respect to the return
types. It looks like it was
[decided|https://github.com/apache/spark/pull/34729#discussion_r767446855 to
keep the old behavior if no scale parameter was passed in, but use the new
functionality if a scale is passed in.
But the scala API didn't get updated to do the same thing as the SQL API.
{code:scala}
scala> spark.range(1).selectExpr("id", "ceil(id) as one_arg_sql", "ceil(id, 0)
as two_arg_sql").select(col("*"), ceil(col("id")).alias("one_arg_func"),
ceil(col("id"), lit(0)).alias("two_arg_func")).printSchema
root
|-- id: long (nullable = false)
|-- one_arg_sql: long (nullable = true)
|-- two_arg_sql: decimal(20,0) (nullable = true)
|-- one_arg_func: decimal(20,0) (nullable = true)
|-- two_arg_func: decimal(20,0) (nullable = true)
scala> spark.range(1).selectExpr("cast(id as double) as id").selectExpr("id",
"ceil(id) as one_arg_sql", "ceil(id, 0) as two_arg_sql").select(col("*"),
ceil(col("id")).alias("one_arg_func"), ceil(col("id"),
lit(0)).alias("two_arg_func")).printSchema
root
|-- id: double (nullable = false)
|-- one_arg_sql: long (nullable = true)
|-- two_arg_sql: decimal(30,0) (nullable = true)
|-- one_arg_func: decimal(30,0) (nullable = true)
|-- two_arg_func: decimal(30,0) (nullable = true) {code}
And because the python code call into this too it also has the same problem. I
suspect that the java and R code also expose it too, but I didn't check.
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