vinodkc commented on code in PR #39747:
URL: https://github.com/apache/spark/pull/39747#discussion_r1088398561
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala:
##########
@@ -3039,3 +3039,113 @@ case class SplitPart (
partNum = newChildren.apply(2))
}
}
+
+/**
+ * Function to check if a given number string is a valid Luhn number.
+ * Returns true, if the number string is a valid Luhn number, false otherwise
+ */
+@ExpressionDescription(
+ usage = """
+ _FUNC_(str ) - Checks that a string of digits is valid according to the
Luhn algorithm.
+ This checksum function is widely applied on credit card numbers and
government identification
+ numbers to distinguish valid numbers from mistyped, incorrect numbers.
+ """,
+ examples = """
+ Examples:
+ > SELECT _FUNC_('8112189876');
+ true
+ > SELECT _FUNC_('79927398713');
+ true
+ > SELECT _FUNC_('79927398714');
+ false
+ """,
+ since = "3.4.0",
Review Comment:
Updated, thanks for the review comment
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