Fix

.github/workflows/experimental.yml

@@ -348,6 +348,7 @@ jobs:
                 --minloglevel=1 \
                 --repro_persist_path=/tmp/spark_fuzzer_repro \
                 --velox_fuzzer_enable_decimal_type \
+                --retry_with_try \
             && echo -e "\n\nSpark Fuzzer run finished successfully."
 
       - name: Archive Spark expression production artifacts

velox/expression/fuzzer/ExpressionFuzzerTest.cpp

@@ -25,6 +25,7 @@
 #include "velox/functions/prestosql/fuzzer/ModulusArgGenerator.h"
 #include "velox/functions/prestosql/fuzzer/MultiplyArgGenerator.h"
 #include "velox/functions/prestosql/fuzzer/PlusMinusArgGenerator.h"
+#include "velox/functions/prestosql/fuzzer/TruncateArgGenerator.h"
 #include "velox/functions/prestosql/registration/RegistrationFunctions.h"
 
 DEFINE_int64(
@@ -84,7 +85,8 @@ int main(int argc, char** argv) {
        {"divide", std::make_shared<DivideArgGenerator>()},
        {"floor", std::make_shared<FloorAndRoundArgGenerator>()},
        {"round", std::make_shared<FloorAndRoundArgGenerator>()},
-       {"mod", std::make_shared<ModulusArgGenerator>()}};
+       {"mod", std::make_shared<ModulusArgGenerator>()},
+       {"truncate", std::make_shared<TruncateArgGenerator>()}};
 
   return FuzzerRunner::run(initialSeed, skipFunctions, {{}}, argGenerators);
 }

velox/functions/prestosql/fuzzer/TruncateArgGenerator.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#pragma once
+
+#include "velox/expression/fuzzer/DecimalArgGeneratorBase.h"
+
+namespace facebook::velox::exec::test {
+
+class TruncateArgGenerator : public fuzzer::DecimalArgGeneratorBase {
+ public:
+  TruncateArgGenerator() {
+    initialize(1);
+  }
+
+ protected:
+  std::optional<std::pair<int, int>> toReturnType(int p, int s) override {
+    auto rp = std::max(p - s, 1);
+    auto rs = 0;
+    return {{rp, rs}};
+  }
+};
+
+} // namespace facebook::velox::exec::test