Update

Author: philo-he

velox/core/QueryConfig.h

@@ -363,9 +363,11 @@ class QueryConfig {
   static constexpr const char* kPrestoArrayAggIgnoreNulls =
       "presto.array_agg.ignore_nulls";
 
-  /// If true, Velox will use an ANSI-compliant dialect. For example, Velox will
-  /// throw a runtime exception instead of returning null results when the
-  /// inputs to a SQL operator or function are invalid.
+  /// If true, Spark function's behavior is ANSI-compliant, e.g. throws runtime
+  /// exception instead of returning null on invalid inputs.
+  /// Note: This feature is still under development to achieve full ANSI
+  /// compliance. Users can refer to the Spark function documentation to verify
+  /// the current support status of a specific function.
   static constexpr const char* kSparkAnsiEnabled = "spark.ansi_enabled";
 
   /// The default number of expected items for the bloomfilter.

velox/docs/configs.rst

@@ -980,8 +980,11 @@ Spark-specific Configuration
    * - spark.ansi_enabled
      - bool
      - false
-     - If true, Velox will use an ANSI-compliant dialect. For example, Velox will throw a runtime exception instead of
-       returning null results when the inputs to a SQL operator or function are invalid.
+     - If true, Spark function's behavior is ANSI-compliant, e.g. throws runtime exception instead
+       of returning null on invalid inputs.
+       Note: This feature is still under development to achieve full ANSI compliance. Users can
+       refer to the Spark function documentation to verify the current support status of a specific
+       function.
    * - spark.legacy_size_of_null
      - bool
      - true