feat(fuzzer): Expand expression fuzzer skip list for fb functions (fa…

…cebookincubator#12571)

Summary:

Add additional skip list for fb functions

Additionally, updates runner with typeArgGenerator and proper timezone that was affecting timezone function matching.

Reviewed By: kagamiori

Differential Revision: D70593746

velox/exec/fuzzer/ToSQLUtil.cpp

@@ -122,7 +122,8 @@ void toCallInputsSql(
 // operators supported in Presto SQL.
 const std::unordered_map<std::string, std::string>& unaryOperatorMap() {
   static std::unordered_map<std::string, std::string> unaryOperatorMap{
-      {"negate", "-"}};
+      {"negate", "-"},
+  };
   return unaryOperatorMap;
 }
 
@@ -141,6 +142,7 @@ const std::unordered_map<std::string, std::string>& binaryOperatorMap() {
       {"gt", ">"},
       {"lte", "<="},
       {"gte", ">="},
+      {"distinct_from", "is distinct from"},
   };
   return binaryOperatorMap;
 }
@@ -163,6 +165,10 @@ std::string toCallSql(const core::CallTypedExprPtr& call) {
     sql << fmt::format(" {} ", binaryOperators.at(call->name()));
     toCallInputsSql({call->inputs()[1]}, sql);
     sql << ")";
+  } else if (call->name() == "is_null" || call->name() == "not_null") {
+    VELOX_CHECK_EQ(call->inputs().size(), 1);
+    toCallInputsSql({call->inputs()[0]}, sql);
+    sql << fmt::format(" is{} null", call->name() == "not_null" ? " not" : "");
   } else if (call->name() == "in") {
     VELOX_CHECK_GE(call->inputs().size(), 2);
     toCallInputsSql({call->inputs()[0]}, sql);

velox/expression/tests/ExpressionVerifier.cpp

@@ -310,6 +310,8 @@ ExpressionVerifier::verify(
             if (exceptionCommonPtr && exceptionReference) {
               verificationStates.push_back(VerificationState::kBothPathsThrow);
             } else {
+              verificationStates.push_back(
+                  VerificationState::kReferencePathUnsupported);
               if (!(defaultNull &&
                     referenceQueryRunner_->runnerType() ==
                         ReferenceQueryRunner::RunnerType::kPrestoQueryRunner)) {