Abstract: Disclosed are a method and system for transaction management, a network device, and a readable storage medium. The method includes the following. A coordinating node receives a structured query language (SQL) request externally initiated, where the SQL request is forwarded by a master node. The coordinating node decomposes the SQL request into sub-SQL (SubSQL) requests, and transmits each of the SubSQL requests to a corresponding slave node. Each slave node receives and processes a corresponding SubSQL request, transmits execution status information of the corresponding SubSQL request to the coordinating node and/or other slave nodes, and receives execution status information in processing respective SubSQL requests by the other slave nodes. Each particular slave node of one or more of the slave nodes feeds back a current local transaction status set of the particular slave node according to status query information received from the master node or the coordinating node.

Abstract: Disclosed are a method and system for transaction management, a network device, and a readable storage medium. The method includes the following. A coordinating node receives a structured query language (SQL) request externally initiated, where the SQL request is forwarded by a master node. The coordinating node decomposes the SQL request into sub-SQL (SubSQL) requests, and transmits each of the SubSQL requests to a corresponding slave node. Each slave node receives and processes a corresponding SubSQL request, transmits execution status information of the corresponding SubSQL request to the coordinating node and/or other slave nodes, and receives execution status information in processing respective SubSQL requests by the other slave nodes. Each particular slave node of one or more of the slave nodes feeds back a current local transaction status set of the particular slave node according to status query information received from the master node or the coordinating node.

Abstract: Disclosed in embodiments of the present disclosure are methods and apparatuses for realizing a globally unique index, which are applicable to a distributed database. One of the methods includes: receiving a structured query language, SQL, request, obtaining a conflict detection SQL statement corresponding to the SQL request and calculating an expected value; issuing the conflict detection SQL statement to each database node for execution; obtaining an execution result of the conflict detection SQL statement, and comparing the execution result of the conflict detection SQL statement with the expected value; and when the execution result of the conflict detection SQL statement is less than or equal to the expected value, processing an original SQL statement of the SQL request, and issuing the original SQL statement to the each database node for execution.

Abstract: Disclosed in embodiments of the present disclosure are methods and apparatuses for realizing a globally unique index, which are applicable to a distributed database. One of the methods includes: receiving a structured query language, SQL, request, obtaining a conflict detection SQL statement corresponding to the SQL request and calculating an expected value; issuing the conflict detection SQL statement to each database node for execution; obtaining an execution result of the conflict detection SQL statement, and comparing the execution result of the conflict detection SQL statement with the expected value; and when the execution result of the conflict detection SQL statement is less than or equal to the expected value, processing an original SQL statement of the SQL request, and issuing the original SQL statement to the each database node for execution.

Abstract: A new design and rapid construction method for flush assembly of prefabricated steel beams and floor slabs is disclosed. The upper flange of prefabricated steel beams is “” shaped, which consists of horizontal flange, vertical flange and top flange. Both beam stiffeners and studs are set on the horizontal flange, in which the former can strengthen the bearing capacity of the beam and avoid its local deformation, and the latter can fix the floor slab; prefabricated studs and precast concrete inside the vertical flange in the factory are used to constrain the deformation of upper flange. There is no limitation with respect to the form of floor slab, which is connected with the prefabricated steel beam by hitching the prefabricated rebar ring of the floor slab to the welded studs of the upper flange of the prefabricated steel beam.

Abstract: A new design and rapid construction method for flush assembly of prefabricated steel beams and floor slabs is disclosed. The upper flange of prefabricated steel beams is “” shaped, which consists of horizontal flange, vertical flange and top flange. Both beam stiffeners and studs are set on the horizontal flange, in which the former can strengthen the bearing capacity of the beam and avoid its local deformation, and the latter can fix the floor slab; prefabricated studs and precast concrete inside the vertical flange in the factory are used to constrain the deformation of upper flange. There is no limitation with respect to the form of floor slab, which is connected with the prefabricated steel beam by hitching the prefabricated rebar ring of the floor slab to the welded studs of the upper flange of the prefabricated steel beam.