Service identifier-based data indexing

A computer-implemented system, comprising:

• one or more computers;
• and
• one or more computer memory devices interoperably coupled with the one or more computers and having tangible, non-transitory, machine-readable media storing one or more instructions that, when executed by the one or more computers, cause the one or more computers to perform operations comprising:
• generating mapping relationships for a plurality of data records including performing, for each data record of the plurality of data records, operations comprising:
• obtaining, by a data service provider that stores data by using a blockchain-type ledger, a service identifier and a service label of the data record, wherein the blockchain-type ledger includes multiple different data records having a same service identifier, wherein the service identifier is used to uniquely identify a service attribute of the data record, and the service label is used to represent a type of the data record;
• establishing, by the data service provider, a mapping relationship among the service identifier, the service label, and location information that indicates a location of the data record in the blockchain-type ledger;
• and
• writing, by the data service provider, the mapping relationship into an index for which a primary key is the service identifier, and for which an index value includes respective mapping relationships for each data record in the blockchain-type ledger having the same service identifier;
• receiving, by the data service provider from a client, a query that comprises a given service identifier and a given service label;
• determining, by the data service provider, the location information for one or more data records represented in the index that match the given service identifier and the given service label;
• obtaining, by the data service provider, the one or more data records from the blockchain-type ledger based on the location information;
• and
• providing, by the data service provider to the client, the one or more data records.

A non-transitory, computer-readable medium storing one or more instructions executable by a computer system to perform operations comprising:

• generating mapping relationships for a plurality of data records including performing, for each data record of the plurality of data records, operations comprising:
• obtaining, by a data service provider that stores data by using a blockchain-type ledger, a service identifier and a service label of the data record, wherein the blockchain-type ledger includes multiple different data records having a same service identifier, wherein the service identifier is used to uniquely identify a service attribute of the data record, and the service label is used to represent a type of the data record;
• establishing, by the data service provider, a mapping relationship among the service identifier, the service label, and location information that indicates a location of the data record in the blockchain-type ledger;
• and
• writing, by the data service provider, the mapping relationship into an index for which a primary key is the service identifier, and for which an index value includes respective mapping relationships for each data record in the blockchain-type ledger having the same service identifier;
• receiving, by the data service provider from a client, a query that comprises a given service identifier and a given service label;
• determining, by the data service provider, the location information for one or more data records represented in the index that match the given service identifier and the given service label;
• obtaining, by the data service provider, the one or more data records from the blockchain-type ledger based on the location information;
• and
• providing, by the data service provider to the client, the one or more data records.