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src/sql/optimizer/ob_raw_expr_check_dep.h

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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.
+ */
+
+#ifndef _OB_RAW_EXPR_CHECK_DEP_H
+#define _OB_RAW_EXPR_CHECK_DEP_H 1
+#include "lib/container/ob_bit_set.h"
+#include "lib/container/ob_iarray.h"
+
+namespace oceanbase {
+namespace sql {
+class ObRawExpr;
+class ObRawExprCheckDep {
+  public:
+  ObRawExprCheckDep(
+      common::ObIArray<ObRawExpr*>& dep_exprs, common::ObBitSet<common::OB_MAX_BITSET_SIZE>& deps, bool is_access)
+      : dep_exprs_(dep_exprs), dep_indices_(&deps), is_access_(is_access)
+  {}
+  virtual ~ObRawExprCheckDep()
+  {}
+
+  /**
+   *  The starting point
+   */
+  int check(const ObRawExpr& expr);
+
+  const common::ObBitSet<common::OB_MAX_BITSET_SIZE>* get_dep_indices() const
+  {
+    return dep_indices_;
+  }
+
+  private:
+  int check_expr(const ObRawExpr& expr, bool& found);
+
+  private:
+  common::ObIArray<ObRawExpr*>& dep_exprs_;
+  common::ObBitSet<common::OB_MAX_BITSET_SIZE>* dep_indices_;
+  bool is_access_;  // mark whether we are do project pruning for access exprs
+  DISALLOW_COPY_AND_ASSIGN(ObRawExprCheckDep);
+};
+}  // namespace sql
+}  // namespace oceanbase
+
+#endif  // _OB_RAW_EXPR_CHECK_DEPENDENCY_H