Abstract: A document index is generated from a set of documents and is used to identify documents that match one or more queries. A tree is generated for each document with a node corresponding to each object of the document. The nodes of the generated trees are merged or combined to generate the document index, which is itself a tree. In addition, an inverted index is generated for each node of the index that identifies the tree(s) that the node originated from. When a query is received, the query is first executed against the document index tree: during the execution, proper set operations are applied to the inverted indices associated with the nodes matched by the query. The resulted set identifies the documents that may match the query. The query is then executed on the identified documents.

Abstract: A document index is generated from a set of documents and is used to identify documents that match one or more queries. A tree is generated for each document with a node corresponding to each object of the document. The nodes of the generated trees are merged or combined to generate the document index, which is itself a tree. In addition, an inverted index is generated for each node of the index that identifies the tree(s) that the node originated from. When a query is received, the query is first executed against the document index tree: during the execution, proper set operations are applied to the inverted indices associated with the nodes matched by the query. The resulted set identifies the documents that may match the query. The query is then executed on the identified documents.

Abstract: A modular compiler architecture utilizes partial compiler modules that cooperatively produce object code for operation on a complex execution infrastructure. The partial compilers may invoke the services of other partial compilers, wherein each partial compiler operates as a self-contained “black-box” module. This structure, in turn, may allow the partial compilers of such implementations to be arranged in modular hierarchies for multi-level compilation and specialization of each partial compiler. These various implementations, in turn, produce compiled programs able to correctly run on large computer clusters comprising a mix of computational resources (machines, multiple cores, graphics cards, SQL server engines, etc.). Certain implementations may also be directed to compilers comprising modular partial compilers, and partial compilers may be formed from generalized forms of traditional compilers. Further disclosed is a set of high-level operations that manipulate partial compilers.