Method, device and system for supporting complex query of block chain and storage medium

Abstract

The invention discloses a method, a device and a system for supporting complex query of a block chain and a storage medium. The method comprises the steps: deploying at least one database supporting complex query for each node in a block chain network, configuring the nodes in the block chain network, and enabling the nodes to respond to a query request transmitted by a client, obtaining a corresponding query result from a database which is deployed by the node and supports complex query, and sending the query result to the client; meanwhile, when the node is configured to meet the triggeringcondition, converting the transaction data in the block of the node into the document object of the database, and then the block of the node is transferred into the database in the form of the document object so as to be inquired by the client. Therefore, on the basis of the mode, the function of supporting complex query of the block chain can be achieved, meanwhile, the convenience of complex query of block chain data is improved, and the service usage scenario of the block chain is broadened.

Description

technical field [0001] The present invention relates to block chain technology, in particular to a method, device, system and storage medium for supporting block chain complex queries. Background technique [0002] For the efficiency of data storage and query, the blockchain usually chooses the underlying storage of the Key-Value type, which will store the historical data of the business primary key (Key) in the distributed ledger, and store the current latest state data of the business primary key (Key) (Value) is stored in the state store. Moreover, the state data (Value) is generally in JSON format. At the same time, its attributes in JSON format are generated on the business side, so the attributes in JSON format are not fixed for the underlying chain, which leads to The upper-level business side cannot query the corresponding data records through the conditions in the JSON-Value. Therefore, the current underlying chain technology cannot directly support complex queries...

AI Technical Summary

Problems solved by technology

Moreover, the state data (Value) is generally in JSON format. At the same time, its attributes in JSON format are generated on the business side, so the attributes in JSON format are not fixed for the underlying chain, which leads to The upper-level business side cannot query the corresponding data records through the conditions in JSON-Value. Therefore, the current underlying chain technology cannot directly support complex queries, which greatly limits the business usage scenarios of the underlying chain

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