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src/sql/resolver/expr/ob_expr_relation_analyzer.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 OCEANBASE_SRC_SQL_RESOLVER_EXPR_OB_EXPR_RELATION_ANALYZER_H_
+#define OCEANBASE_SRC_SQL_RESOLVER_EXPR_OB_EXPR_RELATION_ANALYZER_H_
+
+#include "lib/container/ob_se_array.h"
+namespace oceanbase {
+namespace sql {
+class ObRawExpr;
+class ObDMLStmt;
+class ObQueryRefRawExpr;
+class ObExprRelationAnalyzer {
+  public:
+  explicit ObExprRelationAnalyzer();
+  int pull_expr_relation_id_and_levels(ObRawExpr* expr, int32_t cur_stmt_level);
+
+  private:
+  int init_expr_info(ObRawExpr& expr);
+  int visit_expr(ObRawExpr& expr, int32_t stmt_level);
+  int visit_stmt(ObDMLStmt* stmt);
+
+  private:
+  // auto_free = false, only used in function stack
+  common::ObSEArray<ObQueryRefRawExpr*, common::OB_MAX_SUBQUERY_LAYER_NUM> query_exprs_;
+};
+}  // namespace sql
+}  // namespace oceanbase
+#endif /* OCEANBASE_SRC_SQL_RESOLVER_EXPR_OB_EXPR_RELATION_ANALYZER_H_ */