Abstract: A method and apparatus for evaluating aortic dissection surgery, an electronic device, and a storage medium are provided. The method comprises: obtaining a preoperative aortic model of a patient; simulating aortic dissection surgery on the basis of a virtual stent technology and the preoperative aortic model to obtain a postoperative aortic model; obtaining displacement amount of the same blood vessel node between the preoperative aortic model and the preoperative aortic model; and evaluating a surgical risk degree of the patient on the basis of the displacement amount. The occurrence probability of postoperative complications is related to the displacement amount.

Abstract: Embodiments of the present invention relate to the field of storage technologies, and provide a distributed database processing method. A database processing device receives an access request; obtains, from a partition routing table of the data table according to the query index field and the value of the query index field, partition information and a value that correspond to the query index field; and sends, according to the partition information and the value of the partition information that correspond to the query index field and the value of the query index field, the access request to a database corresponding to the partition information and the value of the partition information.

Abstract: The present invention provides a database access method, where the method includes the following steps: receiving an access request input by a client, where the access request includes at least one command statement; performing rule matching between the command statement included in the access request and a rule in a preset rule set, and performing transformation processing on a statement that is included in the access request and that matches the rule, so as to generate a sinking statement that satisfies an execution requirement of a data source, where the sinking statement is a statement that is delivered to a database and executed by the data source; and transmitting the sinking statement to the database to which the sinking statement points. The present invention further provides a database access apparatus and a database system to which the foregoing method is applied.

Abstract: Embodiments of this application relate to the database field, and in particular, to a method for accessing a distributed database, including: receiving a first access request sent by an application server, where the first access request includes a table name of a first data table and a key value of the first data table; finding, according to the table name of the first data table, that the first data table is a replication table and a first access rule corresponding to the replication table, where the replication table is a same data table stored in multiple database servers; determining a database server that is corresponding to the key value and in the first access rule as a first database server that is preferentially accessed; and sending the first access request to the first database server. Therefore, distributed database access performance is greatly improved.

Abstract: Embodiments of the present invention relate to the field of storage technologies, and provide a distributed database processing method. A database processing device receives an access request; obtains, from a partition routing table of the data table according to the query index field and the value of the query index field, partition information and a value that correspond to the query index field; and sends, according to the partition information and the value of the partition information that correspond to the query index field and the value of the query index field, the access request to a database corresponding to the partition information and the value of the partition information.

Abstract: The present invention provides a database access method, where the method includes the following steps: receiving an access request input by a client, where the access request includes at least one command statement; performing rule matching between the command statement included in the access request and a rule in a preset rule set, and performing transformation processing on a statement that is included in the access request and that matches the rule, so as to generate a sinking statement that satisfies an execution requirement of a data source, where the sinking statement is a statement that is delivered to a database and executed by the data source; and transmitting the sinking statement to the database to which the sinking statement points. The present invention further provides a database access apparatus and a database system to which the foregoing method is applied.