patch 4.0

src/sql/engine/expr/ob_expr_pl_seq_nextval.h

@@ -0,0 +1,52 @@
+/**
+ * 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 _OB_EXPR_SEQ_NEXT_VALUE_H
+#define _OB_EXPR_SEQ_NEXT_VALUE_H
+#include "sql/engine/expr/ob_expr_operator.h"
+#include "share/ob_i_sql_expression.h"
+
+namespace oceanbase
+{
+namespace share
+{
+namespace schema
+{
+class ObSchemaGetterGuard;
+}
+}
+
+namespace sql
+{
+class ObPhysicalPlanCtx;
+class ObExprPLSeqNextval : public ObFuncExprOperator
+  {
+  public:
+    explicit  ObExprPLSeqNextval(common::ObIAllocator &alloc);
+    virtual ~ObExprPLSeqNextval();
+    int calc_result_type1(ObExprResType &type,
+                          ObExprResType &type1,
+                          common::ObExprTypeCtx &type_ctx) const;
+    virtual int cg_expr(ObExprCGCtx &op_cg_ctx,
+                        const ObRawExpr &raw_expr,
+                        ObExpr &rt_expr) const override;
+    static int eval_pl_seq_next_val(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
+  private:
+    int get_schema_guard(ObExecContext *exec_ctx,
+                         share::schema::ObSchemaGetterGuard *&schema_guard) const;
+    // disallow copy
+    DISALLOW_COPY_AND_ASSIGN(ObExprPLSeqNextval);
+
+  };
+}//end namespace sql
+}//end namespace oceanbase
+#endif