Advanced business query language

1. A computer program product comprising a non-transitory machine-readable medium storing instructions that, when executed by at least one programmable processor, cause the at least one programmable processor to perform operations comprising:

determining, at a language layer of a query language architecture, a query syntax of a received query and a definition of a result set for the query;

checking, at a compiler layer of the query language architecture, semantics of the received query, the compiler layer supporting a single data model usable on multiple application layers of a multi-layer business software architecture;

reading, from a data dictionary in a persistent layer of a database from which query results are to be returned, a field expression corresponding to the result set;

building, by the compiler layer, the field expression into a query statement;

executing, at a runtime layer of the query language architecture, the query including the query statement; and

returning results to the query per the result set based on execution of the query on the database.

2. A computer program product as in claim 1 , wherein the query language architecture is implemented in a business software programming language as part of a business software architecture.

3. A computer program product as in claim 2 , wherein the business software programming language comprises an advanced business application programming (ABAP) language.

4. A computer program product as in claim 1 , wherein the query syntax comprises use of logical associations to represent connections between entities.

5. A computer program product as in claim 1 , wherein the operations further comprise pushing logic used in data retrieval for response to the query to a database level of the database.

6. A computer program product as in claim 1 , wherein the compiler layer and the runtime layer are natively implemented in a business software programming language kernel.

7. A computer program product as in claim 1 , wherein the reading of the field expression from the data dictionary in the persistent layer of the database comprises accessing a minimized business object model comprising one or more of definitions of business object nodes, calculated fields, and associations between business object nodes.

8. A system comprising:

at least one programmable processor; and

a machine-readable medium storing instructions that, when executed by the at least one programmable processor, cause the at least one programmable processor to perform operations comprising:

determining, at a language layer of a query language architecture, a query syntax of a received query and a definition of a result set for the query;

checking, at a compiler layer of the query language architecture, semantics of the received query, the compiler layer supporting a single data model usable on multiple application layers of a multi-layer business software architecture;

reading, from a data dictionary in a persistent layer of a database from which query results are to be returned, a field expression corresponding to the result set;

building, by the compiler layer, the field expression into a query statement;

executing, at a runtime layer of the query language architecture, the query including the query statement; and

returning results to the query per the result set based on execution of the query on the database.

9. A system as in claim 8 , wherein the query language architecture is implemented in a business software programming language as part of a business software architecture.

10. A system as in claim 9 , wherein the business software programming language comprises an advanced business application programming (ABAP) language.

11. A system as in claim 8 , wherein the query syntax comprises use of logical associations to represent connections between entities.

12. A system as in claim 8 , wherein the operations further comprise pushing logic used in data retrieval for response to the query to a database level of the database.

13. A computer-implemented method comprising:

determining, at a language layer of a query language architecture, a query syntax of a received query and a definition of a result set for the query;

checking, at a compiler layer of the query language architecture, semantics of the received query, the compiler layer supporting a single data model usable on multiple application layers of a multi-layer business software architecture;

reading, from a data dictionary in a persistent layer of a database from which query results are to be returned, a field expression corresponding to the result set;

building, by the compiler layer, the field expression into a query statement;

executing, at a runtime layer of the query language architecture, the query including the query statement; and

returning results to the query per the result set based on execution of the query on the database.

14. A computer-implemented method as in claim 13 , wherein the query language architecture is implemented in a business software programming language as part of a business software architecture.

15. A computer-implemented method as in claim 14 , wherein the business software programming language comprises an advanced business application programming (ABAP) language.

16. A computer-implemented method as in claim 13 , wherein the query syntax comprises use of logical associations to represent connections between entities.

17. A computer-implemented method as in claim 13 , wherein the operations further comprise pushing logic used in data retrieval for response to the query to a database level of the database.

18. A computer-implemented method as in claim 13 , wherein at least one of the determining, the checking, the reading, the building, the executing, and the returning is performed by a system comprising at least one programmable processor.