Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/15513#discussion_r85627086
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
---
@@ -851,8 +993,16 @@ case class ParseUrl(children: Seq[Expression])
*/
// scalastyle:off line.size.limit
@ExpressionDescription(
- usage = "_FUNC_(String format, Obj... args) - Returns a formatted string
from printf-style format strings.",
- extended = "> SELECT _FUNC_(\"Hello World %d %s\", 100, \"days\");\n
'Hello World 100 days'")
+ usage = "_FUNC_(strfmt, obj, ...) - Returns a formatted string from
printf-style format strings.",
+ extended = """
+ Arguments:
+ strfmt - a string expression.
+ obj - an expression of any type.
--- End diff --
```sql
spark-sql> SELECT format_string("Hello World %d %s", 100, array(1),
struct(1), map(1, 1));
Hello World 100 [1]
```
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