Initial

Author: philo-he

velox/core/QueryConfig.h

@@ -36,6 +36,11 @@ class QueryConfig {
   static constexpr const char* kQueryMaxMemoryPerNode =
       "query_max_memory_per_node";
 
+  /// 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.
+  static constexpr const char* kAnsiEnabled = "ansi_enabled";
+
   /// User provided session timezone. Stores a string with the actual timezone
   /// name, e.g: "America/Los_Angeles".
   static constexpr const char* kSessionTimezone = "session_timezone";
@@ -864,6 +869,10 @@ class QueryConfig {
     return get<uint64_t>(kExprMaxCompiledRegexes, 100);
   }
 
+  bool ansiEnabled() const {
+    return get<bool>(kAnsiEnabled, false);
+  }
+
   bool adjustTimestampToTimezone() const {
     return get<bool>(kAdjustTimestampToTimezone, false);
   }

velox/docs/configs.rst

@@ -43,6 +43,11 @@ Generic Configuration
      - integer
      - 80
      - Abandons partial TopNRowNumber if number of output rows equals or exceeds this percentage of the number of input rows.
+   * - 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.
    * - session_timezone
      - string
      -