patch 4.0

src/sql/engine/expr/ob_expr_plsql_variable.h

@@ -0,0 +1,103 @@
+/**
+ * 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 SRC_SQL_ENGINE_EXPR_OB_EXPR_PLSQL_VARIABLE_H_
+#define SRC_SQL_ENGINE_EXPR_OB_EXPR_PLSQL_VARIABLE_H_
+
+#include "sql/engine/expr/ob_expr_operator.h"
+#include "sql/engine/expr/ob_i_expr_extra_info.h"
+
+namespace oceanbase
+{
+namespace sql
+{
+
+struct ObPLSQLVariableInfo : public ObIExprExtraInfo
+{
+  OB_UNIS_VERSION(1);
+public:
+  ObPLSQLVariableInfo(common::ObIAllocator &alloc, ObExprOperatorType type)
+      : ObIExprExtraInfo(alloc, type)
+  {
+  }
+
+  virtual int deep_copy(common::ObIAllocator &allocator,
+                        const ObExprOperatorType type,
+                        ObIExprExtraInfo *&copied_info) const override;
+
+  template <typename RE>
+  int from_raw_expr(RE &expr, common::ObIAllocator &alloc);
+  int64_t plsql_line_;
+  common::ObString plsql_variable_;
+  ObExprResType result_type_;
+};
+class ObExprPLSQLVariable : public ObFuncExprOperator
+{
+  OB_UNIS_VERSION(1);
+public:
+  explicit ObExprPLSQLVariable(common::ObIAllocator &alloc);
+  virtual ~ObExprPLSQLVariable() {}
+
+  virtual int calc_result_type0(
+    ObExprResType &type, common::ObExprTypeCtx &type_ctx) const;
+
+  virtual int assign(const ObExprOperator &other);
+
+  virtual int cg_expr(ObExprCGCtx &op_cg_ctx,
+                      const ObRawExpr &raw_expr,
+                      ObExpr &rt_expr) const override;
+  static int eval_plsql_variable(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
+
+  void set_plsql_line(int64_t v) { plsql_line_ = v; }
+  int64_t get_plsql_line() { return plsql_line_; }
+
+  int deep_copy_plsql_variable(const common::ObString &v)
+  {
+    return ob_write_string(allocator_, v, plsql_variable_);
+  }
+  common::ObString& get_plsql_variable() { return plsql_variable_; }
+
+  static int check_plsql_ccflags(
+    const common::ObString &v,
+    common::ObIArray<std::pair<common::ObString, common::ObObj> > *result = NULL);
+
+  static int add_to_array(
+    const common::ObString &key,
+    common::ObObj &val,
+    common::ObIArray<std::pair<common::ObString, common::ObObj> > &result);
+  static int check_value(
+    const common::ObString &val, common::ObObj &val_obj);
+  static int check_key(const common::ObString &key);
+
+private:
+  static int get_plsql_unit(common::ObObj &result,
+                            common::ObIAllocator &alloc,
+                            ObSQLSessionInfo &session,
+                            const ObExprResType &result_type,
+                            const ObString &plsql_variable);
+  static int get_key_value(
+    const common::ObString &plsql_ccflags,
+    const common::ObString &key, common::ObObj &value);
+
+private:
+  DISALLOW_COPY_AND_ASSIGN(ObExprPLSQLVariable);
+
+private:
+  int64_t plsql_line_;
+  common::ObString plsql_variable_;
+  common::ObIAllocator &allocator_;
+};
+
+}
+}
+
+#endif /* SRC_SQL_ENGINE_EXPR_OB_EXPR_PLSQL_VARIABLE_H_ */