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unittest/sql/resolver/expr/test_raw_expr_canonicalizer.cpp

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+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#include "sql/test_sql_utils.h"
+#include "sql/resolver/expr/ob_raw_expr_canonicalizer_impl.h"
+#include <gtest/gtest.h>
+#include "lib/utility/ob_test_util.h"
+#include "sql/resolver/expr/ob_raw_expr_util.h"
+#include "sql/resolver/ob_stmt.h"
+#include "sql/ob_sql_context.h"
+#include "lib/json/ob_json_print_utils.h"
+#include <fstream>
+#include <iterator>
+using namespace oceanbase::common;
+using namespace oceanbase::sql;
+
+class TestRawExprCanonicalizer : public ::testing::Test {
+  public:
+  TestRawExprCanonicalizer();
+  virtual ~TestRawExprCanonicalizer();
+  virtual void SetUp();
+  virtual void TearDown();
+
+  private:
+  // disallow copy
+  DISALLOW_COPY_AND_ASSIGN(TestRawExprCanonicalizer);
+
+  protected:
+  // function members
+  void canon(const char* expr, const char*& canon_expr);
+
+  protected:
+  // data members
+};
+
+TestRawExprCanonicalizer::TestRawExprCanonicalizer()
+{}
+
+TestRawExprCanonicalizer::~TestRawExprCanonicalizer()
+{}
+
+void TestRawExprCanonicalizer::SetUp()
+{}
+
+void TestRawExprCanonicalizer::TearDown()
+{}
+
+void TestRawExprCanonicalizer::canon(const char* expr, const char*& canon_expr)
+{
+  ObArray<ObQualifiedName> columns;
+  ObArray<ObVarInfo> sys_vars;
+  ObArray<ObSubQueryInfo> sub_query_info;
+  ObArray<ObAggFunRawExpr*> aggr_exprs;
+  ObArray<ObWinFunRawExpr*> win_exprs;
+  const char* expr_str = expr;
+  ObArenaAllocator allocator(ObModIds::TEST);
+  ObRawExprFactory expr_factory(allocator);
+  ObTimeZoneInfo tz_info;
+  ObStmt stmt;
+  ObQueryCtx query_ctx;
+  ObNameCaseMode case_mode = OB_NAME_CASE_INVALID;
+  ObExprResolveContext ctx(expr_factory, &tz_info, case_mode);
+  stmt.query_ctx_ = &query_ctx;
+  ctx.connection_charset_ = ObCharset::get_default_charset();
+  ctx.dest_collation_ = ObCharset::get_default_collation(ctx.connection_charset_);
+  ctx.stmt_ = &stmt;
+  ObSQLSessionInfo session;
+  session.set_use_static_typing_engine(false);
+  ctx.session_info_ = &session;
+  ObRawExpr* raw_expr = NULL;
+  OK(ObRawExprUtils::make_raw_expr_from_str(
+      expr_str, strlen(expr_str), ctx, raw_expr, columns, sys_vars, &sub_query_info, aggr_exprs, win_exprs));
+  _OB_LOG(DEBUG, "================================================================");
+  _OB_LOG(DEBUG, "%s", expr);
+  _OB_LOG(DEBUG, "%s", CSJ(raw_expr));
+  ObRawExprCanonicalizerImpl canon(ctx);
+  OK(canon.canonicalize(raw_expr));
+  canon_expr = CSJ(raw_expr);
+  _OB_LOG(DEBUG, "canon_expr=%s", canon_expr);
+}
+
+TEST_F(TestRawExprCanonicalizer, basic_test)
+{
+  std::ifstream if_tests("./expr/test_raw_expr_canonicalizer.test");
+  ASSERT_TRUE(if_tests.is_open());
+  std::string line;
+  const char* canon_expr = NULL;
+  std::ofstream of_result("./expr/test_raw_expr_canonicalizer.tmp");
+  ASSERT_TRUE(of_result.is_open());
+  while (std::getline(if_tests, line)) {
+    of_result << line << std::endl;
+    canon(line.c_str(), canon_expr);
+    of_result << canon_expr << std::endl;
+  }
+  of_result.close();
+
+  std::ifstream if_result("./expr/test_raw_expr_canonicalizer.tmp");
+  ASSERT_TRUE(if_result.is_open());
+  std::istream_iterator<std::string> it_result(if_result);
+  std::ifstream if_expected("./expr/test_raw_expr_canonicalizer.result");
+  ASSERT_TRUE(if_expected.is_open());
+  std::istream_iterator<std::string> it_expected(if_expected);
+  ASSERT_TRUE(std::equal(it_result, std::istream_iterator<std::string>(), it_expected));
+  std::remove("./test_raw_expr_canonicalizer.tmp");
+}
+
+int main(int argc, char** argv)
+{
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}