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src/sql/engine/expr/ob_expr_host_ip.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_host_ip.h"
+#include "observer/ob_server_utils.h"
+#include "sql/session/ob_sql_session_info.h"
+#include "observer/ob_server_struct.h"
+
+using namespace oceanbase::common;
+using namespace oceanbase::observer;
+using namespace oceanbase::sql;
+
+namespace oceanbase {
+namespace sql {
+
+ObExprHostIP::ObExprHostIP(ObIAllocator& alloc)
+    : ObFuncExprOperator(alloc, T_FUN_SYS_HOST_IP, N_HOST_IP, 0, NOT_ROW_DIMENSION)
+{}
+
+ObExprHostIP::~ObExprHostIP()
+{}
+
+int ObExprHostIP::calc_result_type0(ObExprResType& type, ObExprTypeCtx& type_ctx) const
+{
+  int ret = OB_SUCCESS;
+  type.set_varchar();
+  type.set_length(MAX_IP_ADDR_LENGTH);
+  if (is_oracle_mode()) {
+    const ObSQLSessionInfo* session = type_ctx.get_session();
+    if (OB_ISNULL(session)) {
+      ret = OB_ERR_UNEXPECTED;
+      SERVER_LOG(WARN, "session is null", K(ret));
+    } else {
+      type.set_collation_type(session->get_nls_collation());
+      type.set_length_semantics(session->get_actual_nls_length_semantics());
+      type.set_collation_level(CS_LEVEL_SYSCONST);
+    }
+  } else {
+    const ObLengthSemantics default_length_semantics =
+        (OB_NOT_NULL(type_ctx.get_session()) ? type_ctx.get_session()->get_actual_nls_length_semantics() : LS_BYTE);
+    type.set_length_semantics(default_length_semantics);
+    type.set_default_collation_type();
+    type.set_collation_level(CS_LEVEL_SYSCONST);
+  }
+  return ret;
+}
+
+int ObExprHostIP::calc_result0(ObObj& result, ObExprCtx& expr_ctx) const
+{
+  int ret = OB_SUCCESS;
+  ObAddr host_addr = ObCurTraceId::get_addr();
+  char* ip_buffer = nullptr;
+  if (OB_ISNULL(expr_ctx.calc_buf_)) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("calc buffer is null", K(ret));
+  } else if (OB_UNLIKELY(!host_addr.is_valid())) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("host addr is invalid", K(ret), K(host_addr));
+  } else if (OB_ISNULL(ip_buffer = static_cast<char*>(expr_ctx.calc_buf_->alloc(OB_IP_STR_BUFF)))) {
+    ret = OB_ALLOCATE_MEMORY_FAILED;
+    LOG_WARN("ip buffer is null", K(ret));
+  } else if (OB_UNLIKELY(!host_addr.ip_to_string(ip_buffer, OB_IP_STR_BUFF))) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("ip to string failed", K(ret), K(host_addr));
+  } else {
+    result.set_varchar(ObString::make_string(ip_buffer));
+    result.set_collation(result_type_);
+  }
+  return ret;
+}
+
+int ObExprHostIP::eval_host_ip(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum)
+{
+  int ret = OB_SUCCESS;
+  UNUSED(expr);
+  char* buf = expr.get_str_res_mem(ctx, OB_IP_STR_BUFF);
+  int32_t pos = 0;
+  if (OB_ISNULL(buf)) {
+    ret = OB_ERR_UNEXPECTED;
+    SERVER_LOG(WARN, "buff is null", K(ret));
+  } else {
+    ObAddr addr = ObCurTraceId::get_addr();
+    MEMSET(buf, 0, OB_IP_STR_BUFF);
+    if (!addr.ip_to_string(buf, OB_IP_STR_BUFF)) {
+      ret = OB_ERR_UNEXPECTED;
+      SERVER_LOG(WARN, "ip to string failed", K(ret));
+    } else {
+      expr_datum.set_string(buf, strlen(buf));
+    }
+  }
+  return ret;
+}
+
+int ObExprHostIP::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_ = ObExprHostIP::eval_host_ip;
+  return OB_SUCCESS;
+}
+
+}  // namespace sql
+}  // namespace oceanbase