implement expr benchmark in mysql mode

deps/oblib/src/lib/ob_name_def.h

@@ -881,4 +881,6 @@
 #define N_MULTI_VALUES_DESC "multi_values_desc"
 #define N_MULTI_VALUE_VECTORS "multi_value_vectors"
 #define N_MULTI_INSERT_COL_CONV_FUNCS "multi_insert_col_conv_funcs"
+#define N_BENCHMARK "benchmark"
+
 #endif  // OCEANBASE_LIB_OB_NAME_DEF_H_

src/sql/CMakeLists.txt

@@ -464,6 +464,8 @@ ob_set_subtarget(ob_sql engine
   engine/expr/ob_expr_calc_urowid.cpp
   engine/expr/ob_expr_cardinality.cpp
   engine/expr/ob_expr_coll_pred.cpp
+  engine/expr/ob_expr_benchmark.cpp
+  engine/expr/ob_expr_benchmark.h
   engine/join/ob_basic_nested_loop_join.cpp
   engine/join/ob_block_based_nested_loop_join.cpp
   engine/join/ob_hash_join.cpp

src/sql/engine/expr/ob_expr_benchmark.cpp

+// (C) Copyright 2013-2016 Alibaba Inc. All Rights Reserved.
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// version 2 as published by the Free Software Foundation.
+// Version: $Id$
+//  Authors:
+//    peihan.dph@alibaba-inc.com
+//  Normalizer:
+//    peihan.dph@alibaba-inc.com
+// This file is for implementation of func expr_benchmark
+
+#define USING_LOG_PREFIX SQL_ENG
+
+#include "sql/engine/expr/ob_expr_benchmark.h"
+#include "sql/engine/ob_exec_context.h"
+#include "sql/session/ob_sql_session_info.h"
+#include "common/ob_smart_call.h"
+
+namespace oceanbase {
+using namespace common;
+
+namespace sql {
+
+ObExprBenchmark::ObExprBenchmark(ObIAllocator &alloc)
+    : ObFuncExprOperator(alloc, T_FUN_SYS_BENCHMARK, N_BENCHMARK, 2, NOT_ROW_DIMENSION)
+{}
+
+int ObExprBenchmark::calc_result_type2(
+    ObExprResType &type, ObExprResType &type1, ObExprResType &type2, ObExprTypeCtx &type_ctx) const
+{
+  int ret = OB_SUCCESS;
+  UNUSED(type2);
+  UNUSED(type_ctx);
+  type.set_int32();
+  type1.set_calc_type(ObIntType);
+  return ret;
+}
+
+int ObExprBenchmark::calc_result2(ObObj &res, const ObObj &obj1, const ObObj &obj2, ObExprCtx &expr_ctx) const
+{
+  UNUSED(res);
+  UNUSED(obj1);
+  UNUSED(obj2);
+  UNUSED(expr_ctx);
+  int ret = OB_NOT_SUPPORTED;
+  LOG_WARN("expr benchmark is not implemented in old engine", K(ret));
+  return ret;
+}
+
+int ObExprBenchmark::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr, ObExpr &rt_expr) const
+{
+  int ret = OB_SUCCESS;
+  UNUSED(raw_expr);
+  UNUSED(expr_cg_ctx);
+  CK(2 == rt_expr.arg_cnt_);
+  if (GET_MIN_CLUSTER_VERSION() < CLUSTER_VERSION_3100) {
+    ret = OB_NOT_SUPPORTED;
+    LOG_WARN("expr benchmark is not implemented", K(ret));
+  } else {
+    rt_expr.eval_func_ = ObExprBenchmark::eval_benchmark;
+  }
+  return ret;
+}
+
+int ObExprBenchmark::eval_benchmark(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum)
+{
+  int ret = OB_SUCCESS;
+  ObDatum *loop_count;
+  if (OB_FAIL(expr.args_[0]->eval(ctx, loop_count))) {
+    LOG_WARN("failed to eval loop count", K(ret));
+  } else if (loop_count->is_null() || loop_count->get_int() < 0) {
+    expr_datum.set_null();
+    if (!loop_count->is_null() && loop_count->get_int() < 0) {
+      LOG_WARN("Incorrect count value for function benchmark", K(loop_count->get_int()));
+    }
+  } else {
+    ObArray<ObExpr *> exprs_to_clear;
+    int64_t loops = loop_count->get_int();
+    ObDatum *tmp_datum = nullptr;
+    if (OB_FAIL(collect_exprs(exprs_to_clear, expr, ctx))) {
+      LOG_WARN("failed to collect expr", K(ret));
+    } else {
+      for (int64_t i = 0; OB_SUCC(ret) && i < loops && OB_SUCC(THIS_WORKER.check_status()); ++i) {
+        clear_all_flags(exprs_to_clear, ctx);
+        OZ(expr.args_[1]->eval(ctx, tmp_datum));
+      }
+    }
+    expr_datum.set_int32(0);
+    exprs_to_clear.destroy();
+  }
+  return ret;
+}
+
+int ObExprBenchmark::collect_exprs(common::ObIArray<ObExpr *> &exprs, const ObExpr &root_expr, ObEvalCtx &ctx)
+{
+  int ret = OB_SUCCESS;
+  for (int64_t i = 0; OB_SUCC(ret) && i < root_expr.arg_cnt_; ++i) {
+    ObEvalInfo &eval_flag = root_expr.args_[i]->get_eval_info(ctx);
+    if (!eval_flag.evaluated_) {
+      OZ(exprs.push_back(root_expr.args_[i]));
+      OZ(SMART_CALL(collect_exprs(exprs, *root_expr.args_[i], ctx)));
+    }
+  }
+  return ret;
+}
+
+void ObExprBenchmark::clear_all_flags(common::ObIArray<ObExpr *> &exprs, ObEvalCtx &ctx)
+{
+  for (int64_t i = 0; i < exprs.count(); ++i) {
+    ObEvalInfo &eval_flag = exprs.at(i)->get_eval_info(ctx);
+    eval_flag.clear_evaluated_flag();
+  }
+}
+
+}  // end namespace sql
+}  // end namespace oceanbase
\ No newline at end of file

src/sql/engine/expr/ob_expr_benchmark.h

+// Copyright 2010-2016 Alibaba Inc. All Rights Reserved.
+// Author:
+//     peihan.dph@alibaba-inc.com
+// Normalizer:
+//     peihan.dph@alibaba-inc.com
+//
+// This file defines implementation for benchmark operator
+#ifndef OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_BENCHMARK_
+#define OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_BENCHMARK_
+
+#include "sql/engine/expr/ob_expr_operator.h"
+
+namespace oceanbase {
+namespace sql {
+class ObExprBenchmark : public ObFuncExprOperator {
+public:
+  explicit ObExprBenchmark(common::ObIAllocator &alloc);
+  virtual ~ObExprBenchmark(){};
+  virtual int calc_result_type2(
+      ObExprResType &type, ObExprResType &type1, ObExprResType &type2, ObExprTypeCtx &type_ctx) const;
+  virtual int calc_result2(ObObj &res, const ObObj &obj1, const ObObj &obj2, ObExprCtx &expr_ctx) const;
+  virtual int cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr, ObExpr &rt_expr) const;
+
+  static int eval_benchmark(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
+
+private:
+  static int collect_exprs(common::ObIArray<ObExpr *> &exprs, const ObExpr &root_expr, ObEvalCtx &ctx);
+  static void clear_all_flags(common::ObIArray<ObExpr *> &exprs, ObEvalCtx &ctx);
+  DISALLOW_COPY_AND_ASSIGN(ObExprBenchmark);
+};
+
+}  // namespace sql
+}  // namespace oceanbase
+#endif /* OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_BENCHMARK_ */

src/sql/engine/expr/ob_expr_eval_functions.cpp

@@ -187,6 +187,7 @@
 #include "ob_expr_degrees.h"
 #include "ob_expr_weight_string.h"
 #include "ob_expr_any_value.h"
+#include "ob_expr_benchmark.h"
 
 namespace oceanbase {
 using namespace common;
@@ -709,7 +710,7 @@ static ObExpr::EvalFunc g_expr_eval_functions[] = {
     NULL,                                     /* 446 */
     NULL,                                     /* 447 */
     NULL,                                     /* 448 */
-    NULL,                                     /* 449 */
+    ObExprBenchmark::eval_benchmark,          /* 449 */
     ObExprExportSet::eval_export_set,         /* 450 */
     ObExprInet6Aton::calc_inet6_aton,         /* 451 */
     ObExprIsIpv4::calc_is_ipv4,               /* 452 */

src/sql/engine/expr/ob_expr_operator_factory.cpp

@@ -271,6 +271,7 @@
 #include "sql/engine/expr/ob_expr_degrees.h"
 #include "sql/engine/expr/ob_expr_weight_string.h"
 #include "sql/engine/expr/ob_expr_any_value.h"
+#include "sql/engine/expr/ob_expr_benchmark.h"
 
 using namespace oceanbase::common;
 namespace oceanbase {
@@ -683,6 +684,7 @@ void ObExprOperatorFactory::register_expr_operators()
   REG_OP(ObExprTimestamp);
   REG_OP(ObExprDegrees);
   REG_OP(ObExprWeightString);
+  REG_OP(ObExprBenchmark);
   // register oracle system function
   REG_OP_ORCL(ObExprSysConnectByPath);
   REG_OP_ORCL(ObExprTimestampNvl);

src/sql/parser/ob_item_type.h

@@ -428,6 +428,7 @@ typedef enum ObItemType {
   T_FUN_SYS_PI = 713,
   T_FUN_SYS_ANY_VALUE = 714,
   T_FUN_SYS_DEGREES = 715,
+  T_FUN_SYS_BENCHMARK = 720,
   T_FUN_SYS_EXPORT_SET = 721,
   
   T_FUN_SYS_INET6NTOA = 722,