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US 8,805,811 B2Granted
Executing user-defined function on a plurality of database tuples
AssigneeHewlett-Packard Development Company, L.P.
InventorsLakshmikant Shrinivas, Hongmin Fan, Charles Edward Bear, Andrew Allinson Lamb
Life of this patent
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Abstract
A method for executing a user-defined function on a plurality of input database tuples. The method may include causing a processor to invoke the function once; and to compute results of the function for the plurality of database tuples.
Claims10
A method for executing a user-defined function, the method comprising:
- getting a single instance of run-length encoded data that represents multiple identical database tuples by indicating a particular tuple and a number of occurrences of that particular tuple;
- invoking the user-defined function once for the multiple identical database tuples;
- and
- computing results of the user-defined function for all of the multiple database tuples by:
- computing a single output value using the particular tuple;
- and
- annotating the single output value with the number of occurrences.
4 more elements
A non-transitory computer readable medium having stored thereon instructions for executing a user-defined function, which when executed by a processor cause the processor to:
- get a single instance of run-length encoded data that represents multiple identical database tuples by indicating a particular tuple and a number of occurrences of that particular tuple;
- invoke the user-defined function once for the multiple identical database tuples;
- and
- compute results of the user-defined function for all of the multiple database tuples by:
- computing a single output value using the particular tuple;
- and
- annotating the single output value with the number of occurrences.
4 more elements
A system comprising:
- a storage device that includes a database that stores run-length encoded data that represents multiple identical database tuples by indicating a particular tuple and a number of occurrences of that particular tuple;
- a processor configurable to execute a user-defined function by:
- getting a single instance of the run-length encoded data;
- invoking the user-defined function once for the multiple identical database tuples;
- and
- computing results of the user-defined function for all of the multiple database tuples by:
- computing a single output value using the particular tuple;
- and
- annotating the single output value with the number of occurrences.
6 more elements
Dependencies are inferred from the claim text.