[GitHub] [spark] johnhany97 commented on a change in pull request #26867: [SPARK-30236][SQL][DOCS][2.4] Clarify date and time patterns supported by date_format

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johnhany97 commented on a change in pull request #26867: [SPARK-30236][SQL][DOCS][2.4] Clarify date and time patterns supported by date_format
URL: https://github.com/apache/spark/pull/26867#discussion_r357324807
 
 

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 File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala
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 @@ -541,7 +541,7 @@ case class WeekOfYear(child: Expression) extends UnaryExpression with ImplicitCa
 
 // scalastyle:off line.size.limit
 @ExpressionDescription(
-  usage = "_FUNC_(timestamp, fmt) - Converts `timestamp` to a value of string in the format specified by the date format `fmt`.",
+  usage = "_FUNC_(timestamp, fmt) - Converts `timestamp` to a value of string in the format specified by the date format `fmt`. See `java.text.SimpleDateFormat` for valid date and time format patterns.",
 
 Review comment:
   Sure thing
   

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