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src/sql/engine/expr/ob_expr_effective_tenant_id.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.
+ */
+
+#define USING_LOG_PREFIX SQL_ENG
+#include "sql/engine/expr/ob_expr_effective_tenant_id.h"
+#include "sql/engine/ob_physical_plan_ctx.h"
+#include "lib/mysqlclient/ob_mysql_result.h"
+#include "lib/mysqlclient/ob_mysql_transaction.h"
+#include "lib/string/ob_sql_string.h"
+#include "lib/mysqlclient/ob_mysql_proxy.h"
+#include "lib/oblog/ob_log_module.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 {
+ObExprEffectiveTenantId::ObExprEffectiveTenantId(ObIAllocator& alloc)
+    : ObFuncExprOperator(alloc, T_FUN_SYS_EFFECTIVE_TENANT_ID, N_EFFECTIVE_TENANT_ID, 0, NOT_ROW_DIMENSION)
+{}
+ObExprEffectiveTenantId::~ObExprEffectiveTenantId()
+{}
+
+int ObExprEffectiveTenantId::calc_result_type0(ObExprResType& type, ObExprTypeCtx& type_ctx) const
+{
+  UNUSED(type_ctx);
+  const bool is_oracle = lib::is_oracle_mode();
+  if (is_oracle) {
+    type.set_type(ObNumberType);
+    type.set_precision(ObAccuracy::DDL_DEFAULT_ACCURACY2[is_oracle][ObNumberType].precision_);
+    type.set_scale(ObAccuracy::DDL_DEFAULT_ACCURACY2[is_oracle][ObNumberType].scale_);
+  } else {
+    type.set_type(ObUInt64Type);
+    type.set_precision(ObAccuracy::DDL_DEFAULT_ACCURACY[ObUInt64Type].precision_);
+    type.set_scale(ObAccuracy::DDL_DEFAULT_ACCURACY[ObUInt64Type].scale_);
+  }
+  return OB_SUCCESS;
+}
+
+int ObExprEffectiveTenantId::calc_result0(ObObj& result, ObExprCtx& expr_ctx) const
+{
+  int ret = OB_SUCCESS;
+  const ObSQLSessionInfo* session_info = NULL;
+  if (OB_ISNULL(session_info = expr_ctx.my_session_)) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("session info is null", K(ret));
+  } else {
+    uint64_t effective_tenant_id = session_info->get_effective_tenant_id();
+    if (OB_UNLIKELY(effective_tenant_id == OB_INVALID_ID)) {
+      ret = OB_ERR_UNEXPECTED;
+      LOG_WARN("effective tanent id is invalid", K(ret));
+    } else {
+      if (lib::is_oracle_mode()) {
+        number::ObNumber num;
+        if (OB_FAIL(num.from(effective_tenant_id, *expr_ctx.calc_buf_))) {
+          LOG_WARN("failed to convert int as number", K(ret));
+        } else {
+          result.set_number(num);
+        }
+      } else {
+        result.set_uint64(effective_tenant_id);
+      }
+    }
+  }
+  return ret;
+}
+
+int ObExprEffectiveTenantId::eval_effective_tenant_id(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum)
+{
+  int ret = OB_SUCCESS;
+  UNUSED(expr);
+  const ObBasicSessionInfo* session_info = NULL;
+  if (OB_ISNULL(session_info = ctx.exec_ctx_.get_my_session())) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("session info is null", K(ret));
+  } else {
+    const uint64_t effective_tenant_id = session_info->get_effective_tenant_id();
+    if (OB_UNLIKELY(effective_tenant_id == OB_INVALID_ID)) {
+      ret = OB_ERR_UNEXPECTED;
+      LOG_WARN("effective tanent id is invalid", K(ret));
+    } else {
+      if (lib::is_oracle_mode()) {
+        char local_buff[number::ObNumber::MAX_BYTE_LEN];
+        ObDataBuffer local_alloc(local_buff, number::ObNumber::MAX_BYTE_LEN);
+        number::ObNumber num;
+        if (OB_FAIL(num.from(effective_tenant_id, local_alloc))) {
+          LOG_WARN("failed to convert int to number", K(ret));
+        } else {
+          expr_datum.set_number(num);
+        }
+      } else {
+        expr_datum.set_uint(effective_tenant_id);
+      }
+    }
+  }
+  return ret;
+}
+
+int ObExprEffectiveTenantId::cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const
+{
+  UNUSED(raw_expr);
+  UNUSED(op_cg_ctx);
+  rt_expr.eval_func_ = ObExprEffectiveTenantId::eval_effective_tenant_id;
+  return OB_SUCCESS;
+}
+
+}  // namespace sql
+}  // namespace oceanbase