Invention Application
- Patent Title: BUILDING A HASH TABLE USING VECTORIZED INSTRUCTIONS
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Application No.: US14990589Application Date: 2016-01-07
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Publication No.: US20160117323A1Publication Date: 2016-04-28
- Inventor: Rajkumar Sen , Nipun Agarwal
- Applicant: Oracle International Corporation
- Main IPC: G06F17/30
- IPC: G06F17/30

Abstract:
Techniques for performing database operations using vectorized instructions are provided. In one technique, a hash table build phase involves executing vectorized instructions to determine whether a bucket in a hash table includes a free slot for inserting a key. A number of data elements from the bucket are loaded in a register. A vectorized instruction is executed against the register may be used to determine a position, within the register, that contains the “smallest” data element. If the data element at that position is zero (or negative), then it is determined that the corresponding position in the bucket is an available slot for inserting a key and corresponding data value.
Public/Granted literature
- US09779123B2 Building a hash table Public/Granted day:2017-10-03
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