Github user dongjoon-hyun commented on a diff in the pull request: https://github.com/apache/spark/pull/14008#discussion_r69385614 --- Diff: sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/StringExpressionsSuite.scala --- @@ -725,4 +725,51 @@ class StringExpressionsSuite extends SparkFunSuite with ExpressionEvalHelper { checkEvaluation(FindInSet(Literal("abf"), Literal("abc,b,ab,c,def")), 0) checkEvaluation(FindInSet(Literal("ab,"), Literal("abc,b,ab,c,def")), 0) } + + test("ParseUrl") { + def checkParseUrl(expected: String, urlStr: String, partToExtract: String): Unit = { + checkEvaluation( + ParseUrl(Seq(Literal.create(urlStr, StringType), + Literal.create(partToExtract, StringType))), expected) + } + def checkParseUrlWithKey( + expected: String, urlStr: String, + partToExtract: String, key: String): Unit = { + checkEvaluation( + ParseUrl(Seq(Literal.create(urlStr, StringType), Literal.create(partToExtract, StringType), + Literal.create(key, StringType))), expected) + } + + checkParseUrl("spark.apache.org", "http://spark.apache.org/path?query=1", "HOST") + checkParseUrl("/path", "http://spark.apache.org/path?query=1", "PATH") + checkParseUrl("query=1", "http://spark.apache.org/path?query=1", "QUERY") + checkParseUrl("Ref", "http://spark.apache.org/path?query=1#Ref", "REF") + checkParseUrl("http", "http://spark.apache.org/path?query=1", "PROTOCOL") + checkParseUrl("/path?query=1", "http://spark.apache.org/path?query=1", "FILE") + checkParseUrl("spark.apache.org:8080", "http://spark.apache.org:8080/path?query=1", "AUTHORITY") + checkParseUrl("userinfo", "http://useri...@spark.apache.org/path?query=1", "USERINFO") + checkParseUrlWithKey("1", "http://spark.apache.org/path?query=1", "QUERY", "query") + + // Null checking + checkParseUrl(null, null, "HOST") + checkParseUrl(null, "http://spark.apache.org/path?query=1", null) + checkParseUrl(null, null, null) + checkParseUrl(null, "test", "HOST") + checkParseUrl(null, "http://spark.apache.org/path?query=1", "NO") + checkParseUrlWithKey(null, "http://spark.apache.org/path?query=1", "HOST", "query") + checkParseUrlWithKey(null, "http://spark.apache.org/path?query=1", "QUERY", "quer") + checkParseUrlWithKey(null, "http://spark.apache.org/path?query=1", "QUERY", null) + checkParseUrlWithKey(null, "http://spark.apache.org/path?query=1", "QUERY", "") + + // exceptional cases + intercept[java.util.regex.PatternSyntaxException] { --- End diff -- Thank you for nice investigation. Yes, the validation of Hive seems to be too limited. I think you can be better than Hive if you supports **Literal** `key` validation? How do you think about that?
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