iRakson commented on a change in pull request #28167: [SPARK-31106][SQL]
Support is_json function
URL: https://github.com/apache/spark/pull/28167#discussion_r406654974
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala
##########
@@ -933,3 +933,58 @@ case class JsonObjectKeys(child: Expression) extends
UnaryExpression with Codege
new GenericArrayData(arrayBufferOfKeys.toArray)
}
}
+
+/**
+ * A function which checks whether the given JSON string is valid JSON string
or not.
+ */
+@ExpressionDescription(
+ usage = """
+ _FUNC_(json_string) - Returns `true` if `json_string` is valid JSON,
`false` if `json_string` is
+ invalid. `NULL` is returned in case of `NULL`.
+ """,
+ examples = """
+ Examples:
+ > Select _FUNC_(null);
+ NULL
+ > Select _FUNC_('{"key" : "valid JSON"}');
+ true
+ > Select _FUNC_('{"invalid JSON"}');
Review comment:
Yes. Sure.
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