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src/sql/engine/expr/ob_expr_is_serving_tenant.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_is_serving_tenant.h"
+#include "sql/engine/ob_exec_context.h"
+#include "sql/session/ob_sql_session_info.h"
+#include "share/ob_unit_getter.h"
+#include "share/ob_i_sql_expression.h"
+#include "share/config/ob_server_config.h"
+using namespace oceanbase::common;
+using namespace oceanbase::share;
+namespace oceanbase {
+namespace sql {
+
+ObExprIsServingTenant::ObExprIsServingTenant(ObIAllocator& alloc)
+    : ObFuncExprOperator(alloc, T_FUN_IS_SERVING_TENANT, N_IS_SERVING_TENANT, 3, NOT_ROW_DIMENSION)
+{}
+
+ObExprIsServingTenant::~ObExprIsServingTenant()
+{}
+
+int ObExprIsServingTenant::calc_result_type3(ObExprResType& type, ObExprResType& type1, ObExprResType& type2,
+    ObExprResType& type3, ObExprTypeCtx& type_ctx) const
+{
+  int ret = OB_SUCCESS;
+  const ObSQLSessionInfo* session = type_ctx.get_session();
+  if (OB_ISNULL(session)) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("session is NULL", K(ret));
+  } else {
+    type1.set_calc_type(ObVarcharType);
+    if (session->use_static_typing_engine()) {
+      type1.set_calc_collation_type(type_ctx.get_coll_type());
+    } else {
+      type1.set_calc_collation_type(ObCharset::get_system_collation());
+    }
+    type2.set_calc_type(ObInt32Type);
+    type3.set_calc_type(ObUInt64Type);
+    type.set_int();
+    type.set_precision(ObAccuracy::DDL_DEFAULT_ACCURACY[ObIntType].precision_);
+    type.set_scale(ObAccuracy::DDL_DEFAULT_ACCURACY[ObIntType].scale_);
+  }
+  return ret;
+}
+
+//... where is_serving_tenant(svr_ip, svr_port, 1001) and tenant_id = 1001
+int ObExprIsServingTenant::calc_result3(
+    ObObj& result, const ObObj& obj1, const ObObj& obj2, const ObObj& obj3, ObExprCtx& expr_ctx) const
+{
+  int ret = OB_SUCCESS;
+  ObString ip;
+  int64_t port = -1;
+  int64_t tenant_id_int64 = -1;
+  if (obj1.is_null() || obj2.is_null() || obj3.is_null()) {
+    result.set_null();
+  } else if (false == ob_is_string_type(obj1.get_type())) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("ip obj's type must be string type", K(ret), K(obj1));
+  } else if (false == ob_is_integer_type(obj2.get_type())) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("port obj's type must be integer type", K(ret), K(obj2));
+  } else if (false == ob_is_integer_type(obj3.get_type())) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("tenant id obj's type must be integer type", K(ret), K(obj3));
+  } else {
+    bool serving = false;
+    EXPR_DEFINE_CAST_CTX(expr_ctx, CM_NONE);
+    EXPR_GET_VARCHAR_V2(obj1, ip);
+    EXPR_GET_INT64_V2(obj2, port);
+    EXPR_GET_INT64_V2(obj3, tenant_id_int64);
+    CK(NULL != expr_ctx.exec_ctx_);
+    if (OB_FAIL(ret)) {
+    } else if (tenant_id_int64 <= 0) {
+      ret = OB_INVALID_ARGUMENT;
+      LOG_WARN("tenant id is <= 0", K(ret), K(tenant_id_int64), K(obj3));
+    } else if (OB_FAIL(check_serving_tenant(serving, *expr_ctx.exec_ctx_, ip, port, tenant_id_int64))) {
+      LOG_WARN("check serving tenant failed", K(ret));
+    } else {
+      result.set_int(serving);
+    }
+  }
+  return ret;
+}
+
+int ObExprIsServingTenant::check_serving_tenant(
+    bool& serving, ObExecContext& exec_ctx, const ObString& ip, const int64_t port, const uint64_t tenant_id)
+{
+  int ret = OB_SUCCESS;
+  if (OB_SYS_TENANT_ID == tenant_id) {
+    serving = true;
+  } else {
+    ObAddr svr;
+    ObUnitInfoGetter ui_getter;
+    ObArray<ObAddr> servers;
+    if (OB_ISNULL(exec_ctx.get_sql_proxy())) {
+      ret = OB_ERR_UNEXPECTED;
+      LOG_ERROR("sql proxy from exec_ctx is NULL", K(ret));
+    } else if (OB_FAIL(ui_getter.init(*exec_ctx.get_sql_proxy(), &GCONF))) {
+      LOG_WARN("fail to init ObUnitInfoGetter", K(ret));
+    } else if (OB_FAIL(ui_getter.get_tenant_servers(tenant_id, servers))) {
+      LOG_WARN("fail to get servers of a tenant", K(ret));
+    } else if (false == svr.set_ip_addr(ip, static_cast<int32_t>(port))) {
+      ret = OB_ERR_UNEXPECTED;
+      LOG_WARN("fail to set ip addr", K(ret), K(ip), K(port));
+    } else {
+      bool found_server = false;
+      for (int64_t i = 0; OB_SUCC(ret) && false == found_server && i < servers.count(); ++i) {
+        if (svr == servers.at(i)) {
+          found_server = true;
+        }
+      }
+      if (OB_SUCC(ret)) {
+        serving = found_server;
+      }
+    }
+  }
+  return ret;
+}
+
+int ObExprIsServingTenant::cg_expr(ObExprCGCtx&, const ObRawExpr&, ObExpr& expr) const
+{
+  int ret = OB_SUCCESS;
+  CK(3 == expr.arg_cnt_);
+  expr.eval_func_ = eval_is_serving_tenant;
+  return ret;
+}
+
+int ObExprIsServingTenant::eval_is_serving_tenant(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum)
+{
+  int ret = OB_SUCCESS;
+  ObDatum* ip = NULL;
+  ObDatum* port = NULL;
+  ObDatum* tenant = NULL;
+  bool serving = false;
+  if (OB_FAIL(expr.eval_param_value(ctx, ip, port, tenant))) {
+    LOG_WARN("evaluate parameters failed", K(ret));
+  } else if (ip->is_null() || port->is_null() || tenant->is_null()) {
+    expr_datum.set_null();
+  } else if (OB_FAIL(
+                 check_serving_tenant(serving, ctx.exec_ctx_, ip->get_string(), port->get_int(), tenant->get_uint()))) {
+    LOG_WARN("check serving tenant failed", K(ret));
+  } else {
+    expr_datum.set_int(serving);
+  }
+  return ret;
+}
+
+}  // namespace sql
+}  // namespace oceanbase