Microsoft Technology Licensing, LLC

Walaa Eldin M Moustafa

Scott M Meyer

Andrew Rodriguez

Andrew Joseph Carter

Shrikanth Shankar

Xiaobin Ma

Srinath Shankar

Khai Tran

Maneesh Varshney

Adwait N Tumbde

Vasanth Rajamani

Suja Viswesan

Ratandeep S Ratti

Carl W Steinbach

During operation, a system for processing queries of a graph database executes a set of processes for processing queries of a graph database storing a graph, wherein the graph comprises a set of nodes, a set of edges between pairs of nodes in the set of nodes, and a set of predicates. When a query of the graph database is received, the system obtains, from the query, a compound comprising a compound type and a set of identity-giving nodes. Next, the system uses the compound to access a tuple for storage in a log-based representation of the graph database, wherein the tuple includes the compound type and the identity-giving nodes. The system then uses the tuple to generate a result of the query and provides the result in a response to the query.

Supporting tuples in log-based representations of graph databases

The disclosed embodiments provide a system for processing queries of a graph database. During operation, the system executes a set of processes for maintaining the graph database storing a graph, wherein the graph includes a set of nodes, a set of edges between pairs of nodes in the set of nodes, and a set of predicates. When a write query of the graph database is received, the system uses one or more of the processes to process the write query by using a schema of the graph database to validate the write query. Next, the system transmits the validated write query to a set of shards containing the graph database. Finally, the system processes the write query at each shard when a shard identifier representing the shard is matched to one or more attributes in the write query.

Distributed graph database writes

The disclosed embodiments provide a system for processing data. During operation, the system obtains a user-defined function (UDF) that is defined using a standard UDF interface for accessing multiple platforms. Next, the system converts data in a platform into a standard form that is supported by the standard UDF interface using a platform-specific wrapper for the UDF and a platform-specific implementation of the standard UDF interface. The system then generates output data in the standard form by applying one or more operations to the data in the standard form. Finally, the system converts the output data into a platform-specific form that is supported by the platform and returns the output data in the platform-specific form.

Platform-independent user-defined functions for data access

The disclosed embodiments provide a system for processing queries of a graph database. During operation, the system executes a set of processes for processing queries of a graph database storing a graph, wherein the graph comprises a set of nodes, a set of edges between pairs of nodes in the set of nodes, and a set of predicates. When a query of the graph database is received, the system performs a lookup of a hash map to obtain one or more offsets into a compound store for the graph database, which includes identity-giving nodes for a set of tuples in the graph database. Next, the system accesses the offset(s) in the compound store to obtain a subset of tuples matching the query. The system then uses the subset of tuples to generate a result of the query and provides the result in a response to the query.

Compound indexes for graph databases

The disclosed embodiments provide a system for processing queries of a graph database. During operation, the system executes one or more processes for providing the graph database storing a graph, wherein the graph includes a set of nodes, a set of edges between pairs of nodes in the set of nodes, and a set of predicates. Next, the system receives a query containing a missing value parameter, wherein the missing value parameter designates an attribute in the graph database with a nonexistent value. The system then produces, from the query, a transformed query comprising one or more parameters that do not include the missing value parameter. Finally, the system uses the transformed query and the graph database to generate a result of the query and provides the result in a response to the query.

Transforming and evaluating missing values in graph databases

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Santa Clara, CA, United States of America

Walaa Eldin M Moustafa