Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/10226#discussion_r47104050
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Column.scala ---
@@ -84,7 +84,7 @@ class TypedColumn[-T, U](
* col("`a.column.with.dots`") // Escape `.` in column names.
* $"columnName" // Scala short hand for a named column.
* expr("a + 1") // A column that is constructed from a
parsed SQL Expression.
- * lit("1") // A column that produces a literal
(constant) value.
+ * lit("abc") // A column that produces a literal
(constant) value.
--- End diff --
cc @marmbrus I changed it to a string literal. Otherwise it might be
confusing to some users thinking the way to specify a numeric literal is also
to wrap it in string.
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