Data storage apparatus, translation apparatus, and database access method

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

• receiving, from a client, a first access request that conforms to a non-structured query language (NoSQL) syntax for accessing a wide column store, wherein the first access request comprises one or more first event features and one or more first attribute features that are related to the wide column store, and the one or more first attribute features comprise features of a first column family and features of a second column family of the wide column store;
• translating the first access request into a second access request that conforms to a structured query language (SQL) syntax, wherein the second access request comprises one or more second event features corresponding to the one or more first event features and one or more second attribute features corresponding to the one or more first attribute features, and the one or more second attribute features comprise:
• one or more column family fields corresponding to one or more column families of the wide column store, each of the one or more column family fields used to store a name of a corresponding column field in a corresponding column family of the wide column store, and
• one or more data value fields each used to store one or more field values of a corresponding column field in a corresponding column family of the wide column store;
• forwarding the second access request to a relational database;
• receiving, from the relational database, a response to the second access request;
• translating the response into a response to the first access request;
• and
• sending the translated response to the client.

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, perform one or more operations comprising:
• receiving, from a client, a first access request that conforms to a non-structured query language (NoSQL) syntax for accessing a wide column store, wherein the first access request comprises one or more first event features and one or more first attribute features that are related to the wide column store, and the one or more first attribute features comprise features of a first column family and features of a second column family feature of the wide column store;
• translating the first access request into a second access request that conforms to a structured query language (SQL) syntax, wherein the second access request comprises one or more second event features corresponding to the one or more first event features and one or more second attribute features corresponding to the one or more first attribute features, and the one or more second attribute features comprise:
• one or more column family fields corresponding to one or more column families of the wide column store, each of the one or more column family fields used to store a name of a corresponding column field in a corresponding column family of the wide column store, and
• one or more data value fields each used to store one or more field values of a corresponding column field in a corresponding column family of the wide column store;
• forwarding the second access request to a relational database;
• receiving, from the relational database, a response to the second access request;
• translating the response into a response to the first access request;
• and
• sending the translated response to the client.