[CP] enhance GTT

2023-07-21 09:48:58 +00:00
parent 8d7256d488
commit b3e8f8f67b
28 changed files with 454 additions and 154 deletions
--- a/src/sql/engine/expr/ob_expr_temp_table_ssid.cpp
+++ b/src/sql/engine/expr/ob_expr_temp_table_ssid.cpp
@ -0,0 +1,92 @@
+/**
+ * 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.
+ */
+
+// (C) Copyright 2011-2023 Alibaba Inc. All Rights Reserved.
+//  Authors:
+//    jim.wjh <>
+//
+#define USING_LOG_PREFIX SQL_ENG
+#include "ob_expr_temp_table_ssid.h"
+#include "sql/session/ob_sql_session_info.h"
+#include "sql/engine/ob_exec_context.h"
+
+using namespace oceanbase::common;
+using namespace oceanbase::sql;
+
+namespace oceanbase
+{
+namespace sql
+{
+
+ObExprTempTableSSID::ObExprTempTableSSID(ObIAllocator &alloc)
+    : ObFuncExprOperator(alloc, T_FUN_GET_TEMP_TABLE_SESSID, N_TEMP_TABLE_SSID, 1, NOT_VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
+{
+}
+
+ObExprTempTableSSID::~ObExprTempTableSSID()
+{
+}
+
+int ObExprTempTableSSID::calc_result_type1(ObExprResType &type, ObExprResType &type1, ObExprTypeCtx &type_ctx) const
+{
+  UNUSED(type1);
+  UNUSED(type_ctx);
+  int ret = OB_SUCCESS;
+  type.set_int();
+  type.set_precision(ObAccuracy::DDL_DEFAULT_ACCURACY[ObIntType].precision_);
+  type.set_scale(DEFAULT_SCALE_FOR_INTEGER);
+  type1.set_calc_type(ObIntType);
+  return ret;
+}
+
+int ObExprTempTableSSID::calc_temp_table_ssid(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
+{
+  int ret = OB_SUCCESS;
+  ObDatum *param = NULL;
+  if (OB_ISNULL(ctx.exec_ctx_.get_my_session())) {
+    ret = OB_ERR_UNDEFINED;
+  } else if (OB_FAIL(expr.args_[0]->eval(ctx, param))) {
+    LOG_WARN("fail to eval param", K(ret));
+  } else if (expr.args_[0]->datum_meta_.type_ != ObIntType) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("invalid object", K(ret));
+  } else {
+    switch (param->get_int()) {
+      case GTT_SESSION_SCOPE:
+        res.set_int(ctx.exec_ctx_.get_my_session()->get_gtt_session_scope_unique_id());
+        break;
+      case GTT_TRANS_SCOPE:
+        res.set_int(ctx.exec_ctx_.get_my_session()->get_gtt_trans_scope_unique_id());
+        break;
+      default:
+        ret = OB_ERR_UNEXPECTED;
+        LOG_WARN("invalid object", K(ret), KPC(param));
+    }
+    LOG_DEBUG("get result", K(res.get_int()));
+  }
+  return ret;
+}
+
+int ObExprTempTableSSID::cg_expr(
+    ObExprCGCtx &op_cg_ctx,
+    const ObRawExpr &raw_expr,
+    ObExpr &rt_expr) const
+{
+  UNUSED(op_cg_ctx);
+  UNUSED(raw_expr);
+  int ret = OB_SUCCESS;
+  rt_expr.eval_func_ = calc_temp_table_ssid;
+  return ret;
+}
+
+}
+}