maropu commented on a change in pull request #28106: [SPARK-31335][SQL] Add try
function support
URL: https://github.com/apache/spark/pull/28106#discussion_r407339877
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/misc.scala
##########
@@ -198,3 +201,69 @@ case class TypeOf(child: Expression) extends
UnaryExpression {
defineCodeGen(ctx, ev, _ =>
s"""UTF8String.fromString(${child.dataType.catalogString})""")
}
}
+
+// scalastyle:off line.size.limit
+@ExpressionDescription(
+ usage = """
+ _FUNC_(expr) - Evaluate an expression and handle certain types of
execution errors by returning NULL.
Review comment:
nit: `execution errors` => `runtime exceptions` from the ANSI document?
https://github.com/apache/spark/blob/master/docs/sql-ref-ansi-compliance.md
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