From b4c02e0c8d221540b3e198114508ebb0275844d8 Mon Sep 17 00:00:00 2001
From: Yunus Emre Ozen <94426948+ozenyunus35@users.noreply.github.com>
Date: Thu, 15 Oct 2026 03:45:00 +0300
Subject: [PATCH] fix(spark): return NULL from parse_url for a malformed URL
 unless ANSI

Closes #26341.
---
 .../spark/src/function/url/parse_url.rs       | 35 ++++++++++++++++---
 .../test_files/spark/url/parse_url.slt        | 20 +++++++++++
 2 files changed, 51 insertions(+), 4 deletions(-)

diff --git a/datafusion/spark/src/function/url/parse_url.rs b/datafusion/spark/src/function/url/parse_url.rs
index c385f43e49343..bac4be6fdc8ad 100644
--- a/datafusion/spark/src/function/url/parse_url.rs
+++ b/datafusion/spark/src/function/url/parse_url.rs
@@ -193,8 +193,11 @@ impl ScalarUDFImpl for ParseUrl {
     }
 
     fn invoke_with_args(&self, args: ScalarFunctionArgs) -> Result<ColumnarValue> {
-        let ScalarFunctionArgs { args, .. } = args;
-        make_scalar_function(spark_parse_url, vec![])(&args)
+        let enable_ansi_mode = args.config_options.execution.enable_ansi_mode;
+        make_scalar_function(
+            move |arrays: &[ArrayRef]| spark_parse_url(arrays, enable_ansi_mode),
+            vec![],
+        )(&args.args)
     }
 }
 
@@ -213,8 +216,14 @@ impl ScalarUDFImpl for ParseUrl {
 /// - A string array with extracted URL components
 /// - `None` values where extraction failed or component doesn't exist
 /// - The output array type (StringArray or LargeStringArray) is determined by input types
-fn spark_parse_url(args: &[ArrayRef]) -> Result<ArrayRef> {
-    spark_handled_parse_url(args, |x| x)
+///
+/// Like Spark, a malformed URL is an error only in ANSI mode; otherwise it
+/// yields NULL, as `try_parse_url` does.
+fn spark_parse_url(args: &[ArrayRef], enable_ansi_mode: bool) -> Result<ArrayRef> {
+    spark_handled_parse_url(args, |x| match x {
+        Err(_) if !enable_ansi_mode => Ok(None),
+        result => result,
+    })
 }
 
 pub fn spark_handled_parse_url(
@@ -612,6 +621,24 @@ mod tests {
         Ok(())
     }
 
+    #[test]
+    fn test_malformed_url_is_null_unless_ansi() -> Result<()> {
+        let urls = sa(&[
+            Some("inva lid://spark.apache.org/path?query=1"),
+            Some("https://example.com/a"),
+        ]);
+        let parts = sa(&[Some("QUERY"), Some("PATH")]);
+
+        let out = spark_parse_url(&[Arc::clone(&urls), Arc::clone(&parts)], false)?;
+        let out_sa = out.as_any().downcast_ref::<StringArray>().unwrap();
+        assert!(out_sa.is_null(0));
+        assert_eq!(out_sa.value(1), "/a");
+
+        let err = spark_parse_url(&[urls, parts], true).unwrap_err();
+        assert!(format!("{err}").contains("The url is invalid"));
+        Ok(())
+    }
+
     #[test]
     fn test_invalid_arg_count() {
         let urls = sa(&[Some("https://example.com")]);
diff --git a/datafusion/sqllogictest/test_files/spark/url/parse_url.slt b/datafusion/sqllogictest/test_files/spark/url/parse_url.slt
index 31f63607bc63d..0064df7dea97f 100644
--- a/datafusion/sqllogictest/test_files/spark/url/parse_url.slt
+++ b/datafusion/sqllogictest/test_files/spark/url/parse_url.slt
@@ -343,9 +343,29 @@ NULL
 statement error 'parse_url' does not support zero arguments
 SELECT parse_url();
 
+# A malformed URL is NULL unless ANSI mode is on, as in Spark
+query T
+SELECT parse_url('inva lid://spark.apache.org/path?query=1', 'QUERY');
+----
+NULL
+
+query T
+SELECT parse_url('http://example.com:99999/', 'HOST');
+----
+NULL
+
+statement ok
+set datafusion.execution.enable_ansi_mode = true;
+
 query error DataFusion error: Execution error: The url is invalid: inva lid://spark\.apache\.org/path\?query=1\. Use `try_parse_url` to tolerate invalid URL and return NULL instead\. SQLSTATE: 22P02
 SELECT parse_url('inva lid://spark.apache.org/path?query=1', 'QUERY');
 
+query error DataFusion error: Execution error: InvalidPort
+SELECT parse_url('http://example.com:99999/', 'HOST');
+
+statement ok
+set datafusion.execution.enable_ansi_mode = false;
+
 # NULL argument handling (Sail PR #1393)
 # NULL URL should return NULL
 query T