init push

2021-05-31 22:56:52 +08:00
commit cea7de1475
7020 changed files with 5689869 additions and 0 deletions
--- a/src/sql/engine/expr/ob_expr_user.cpp
+++ b/src/sql/engine/expr/ob_expr_user.cpp
@ -0,0 +1,104 @@
+/**
+ * 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_user.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/engine/ob_exec_context.h"
+
+using namespace oceanbase::common;
+using namespace oceanbase::sql;
+
+namespace oceanbase {
+namespace sql {
+
+ObExprUser::ObExprUser(ObIAllocator& alloc) : ObFuncExprOperator(alloc, T_FUN_SYS_USER, N_USER, 0, NOT_ROW_DIMENSION)
+{}
+
+ObExprUser::~ObExprUser()
+{}
+
+int ObExprUser::calc_result_type0(ObExprResType& type, ObExprTypeCtx& type_ctx) const
+{
+  UNUSED(type_ctx);
+  if (share::is_oracle_mode()) {
+    // FIXME: This function returns a VARCHAR2 value in oracle mode.
+    // https://docs.oracle.com/en/database/oracle/oracle-database/18/sqlrf/USER.html#GUID-AD0B927B-EFD4-4246-89B4-2D55AB3AF531
+    // `Oracle Database compares values of this function with blank-padded comparison semantics.`
+    type.set_char();
+    // DEFAULT for oracle
+    type.set_collation_type(CS_TYPE_UTF8MB4_BIN);
+  } else {
+    type.set_varchar();
+    type.set_default_collation_type();
+  }
+  type.set_collation_level(CS_LEVEL_SYSCONST);
+  type.set_length(static_cast<ObLength>((OB_MAX_HOST_NAME_LENGTH + OB_MAX_USER_NAME_LENGTH + 1)));
+  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);
+  return OB_SUCCESS;
+}
+
+int ObExprUser::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 {
+    if (share::is_oracle_mode()) {
+      const ObString session_user = session_info->get_user_name();
+      result.set_char(session_user);
+      result.set_collation(result_type_);
+    } else {
+      const ObString session_user = session_info->get_user_at_client_ip();
+      result.set_varchar(session_user);
+      result.set_collation(result_type_);
+    }
+  }
+  return ret;
+}
+
+int ObExprUser::eval_user(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 {
+    if (lib::is_oracle_mode()) {
+      expr_datum.set_string(session_info->get_user_name());
+    } else {
+      expr_datum.set_string(session_info->get_user_at_client_ip());
+    }
+  }
+  return ret;
+}
+
+int ObExprUser::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_ = ObExprUser::eval_user;
+  return OB_SUCCESS;
+}
+}  // namespace sql
+}  // namespace oceanbase