Sybase, Inc.

Sap Se

Prabhas Kumar Samanta

Xun Cheng

Xiaobin Ma

Mihnea Andrei

Anisoara Nica

Reza Sherkat

Nitesh Maheshwari

Xiao Ming Zhou

Haiyan Du

Disclosed herein are system, method, and computer program product embodiments for performing dynamic partition pruning using data statistic objects as data integrity constraints. An embodiment operates by partitioning a database table into a plurality of partitions based on a partition criterion. The embodiment creates a data statistics object for a partition in the plurality of partitions. The embodiment receives a query for the database table. The embodiment determines the data statistics object is consistent with data in the partition. The embodiment processes the query for the partition based on the data statistics object.

Constraint data statistics for dynamic partition pruning

An original query execution plan of a database query is received. The original query execution plan represents a tree of operators. Source code for the original query execution plan is generated by a single traversal of the tree of operators. The generated source code is compiled into native machine code. The native machine code represents a simplified native access plan (SNAP).

Generating a producer-driven execution plan from a consumer-driven iterator-based execution plan

Various embodiments of systems and methods to generate native access plan source code are described herein. In one aspect, a database query is received. A query execution plan, including a parent operator and one or more descendent operators, corresponding to the database query is retrieved. Further, a check is made to determine whether the parent operator and the one or more descendent operators include at least one loop. When both the parent operator and the one or more descendent operators include at least one loop, consume points for the at least one loop are defined. The parent operator and the one or more descendent operators are merged based on consume point types to generate native access plan source code.

Native access plan source code generation

A method, a system and a computer program product for maintaining a pre-computed result set are disclosed. A server coupled to a data source determines whether an object stored in the data source received an update. The server identifies at least one identifier associated with a pre-computed result set based on that determination. The pre-computed result set is computed based on the object. The server computes an updated pre-computed result set using the identifier by applying the received update to the pre-computed result set.

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Kolkata, India

Prabhas Kumar Samanta