Merge pull request #3847 from Mytherin/expandossfuzz

Expand oss-fuzz tests to run queries and check for internal errors

test/ossfuzz/parse_fuzz_test.cpp

@@ -1,10 +1,25 @@
-#include "duckdb/parser/parser.hpp"
+#include "duckdb.hpp"
+#include "duckdb/common/string_util.hpp"
+#include <string>
+#include <unordered_set>
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
 	std::string input(reinterpret_cast<const char *>(data), size);
-	duckdb::Parser parser;
+	duckdb::DuckDB db(nullptr);
+	duckdb::Connection con(db);
+
+	std::unordered_set<std::string> internal_error_messages = {"Unoptimized Result differs from original result!",
+	                                                           "INTERNAL"};
+	con.Query("PRAGMA enable_verification");
 	try {
-		parser.ParseQuery(input);
+		auto result = con.Query(input);
+		if (!result->success) {
+			for (auto &internal_error : internal_error_messages) {
+				if (duckdb::StringUtil::Contains(result->error, internal_error)) {
+					return 1;
+				}
+			}
+		}
 	} catch (std::exception &e) {
 	}
 	return 0;