patch 4.0

src/sql/engine/expr/ob_pl_expr_subquery.h

@@ -0,0 +1,108 @@
+/**
+ * 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.
+ */
+
+#ifndef OCEANBASE_SQL_OB_PL_EXPR_SUBQUERY_H_
+#define OCEANBASE_SQL_OB_PL_EXPR_SUBQUERY_H_
+
+#include "common/object/ob_object.h"
+#include "sql/engine/expr/ob_expr_operator.h"
+#include "pl/ob_pl_type.h"
+#include "sql/engine/expr/ob_i_expr_extra_info.h"
+
+namespace oceanbase
+{
+namespace sql
+{
+
+struct ObExprPlSubQueryInfo : public ObIExprExtraInfo
+{
+  OB_UNIS_VERSION(1);
+public:
+  ObExprPlSubQueryInfo(common::ObIAllocator &alloc, ObExprOperatorType type)
+      : ObIExprExtraInfo(alloc, type),
+      id_(common::OB_INVALID_ID),
+      type_(stmt::T_NONE),
+      route_sql_(ObString()),
+      result_type_(),
+      is_ignore_fail_(false) {}
+
+  virtual int deep_copy(common::ObIAllocator &allocator,
+                        const ObExprOperatorType type,
+                        ObIExprExtraInfo *&copied_info) const override;
+
+  template <typename RE>
+  int from_raw_expr(RE &expr, ObIAllocator &alloc);
+
+  ObPsStmtId id_; //prepare的语句id
+  stmt::StmtType type_; //prepare的语句类型
+
+  common::ObString route_sql_;
+  sql::ObExprResType result_type_;
+  bool is_ignore_fail_;
+};
+
+class ObExprOpSubQueryInPl : public ObFuncExprOperator
+{
+  OB_UNIS_VERSION(1);
+public:
+  explicit ObExprOpSubQueryInPl(common::ObIAllocator &alloc);
+  virtual ~ObExprOpSubQueryInPl();
+
+  virtual int calc_result_typeN(ObExprResType &type,
+                                ObExprResType *types_stack,
+                                int64_t param_num,
+                                common::ObExprTypeCtx &type_ctx) const;
+
+  virtual inline void reset() {
+    route_sql_.reset();
+    ObFuncExprOperator::reset();
+  }
+
+  virtual int assign(const ObExprOperator &other);
+
+  int deep_copy_route_sql(const common::ObString &v)
+  {
+    return ob_write_string(allocator_, v, route_sql_);
+  }
+
+  inline void set_ps_id(ObPsStmtId id) { id_ = id; }
+  inline void set_stmt_type(stmt::StmtType type) { type_ = type; }
+  inline void set_route_sql(common::ObString sql) { route_sql_ = sql; }
+  inline void set_result_type(ObExprResType type) { result_type_ = type; }
+  inline void set_ignore_fail() { is_ignore_fail_ = true; }
+
+  virtual int cg_expr(ObExprCGCtx &op_cg_ctx,
+                      const ObRawExpr &raw_expr, ObExpr &rt_expr) const override;
+
+  static int eval_subquery(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
+
+private:
+  static int fill_obj_stack(const ObExpr &expr, ObEvalCtx &ctx, common::ObObj *objs);
+  static int fill_param_store(const ObObj *objs_stack, int64_t param_num, ParamStore& params);
+  static int fetch_row(void *result_ret, int64_t &row_count, ObNewRow &cur_row);
+  static int get_result(void *result_set, ObObj &result, ObIAllocator &alloc);
+
+  ObPsStmtId id_; //prepare的语句id
+  stmt::StmtType type_; //prepare的语句类型
+
+  common::ObString route_sql_;
+  ObExprResType result_type_;
+  bool is_ignore_fail_;
+  common::ObIAllocator &allocator_;
+
+private:
+  DISALLOW_COPY_AND_ASSIGN(ObExprOpSubQueryInPl);
+};
+
+} //sql
+} //oceanbase
+#endif //OCEANBASE_SQL_OB_PL_EXPR_SUBQUERY_H_