NonStop SQL

View Current Viewing Revision #10 from 11/21/2019 8:38 p.m.

Query Compilation

The query compiler transforms the SQL source command into executable query plans in host language. The executable query plan and the SQL source command are stored in a newly created object program file.

Indexes

B+Tree

NonStop SQL supports B+ tree index. By default, the primary key is used as the index of a table. To speed up the non-primary key look up, an index table can be created based on selected columns.

Storage Architecture

Disk-oriented

The data of every table is stored in one or more disk files. Each disk file has a label storing the name and catalog information of the associated table.

Views

Virtual Views

Whenever a view is created, NonStop SQL stores a view definition instead of the materialized table. Whenever a user selects data from a view, the data is directly retrieved from the underlying base tables.

Storage Model

N-ary Storage Model (Row/Record)

NonStop SQL uses the N-ary Storage Model, which is appropriate for heavy OLTP workloads.

Data Model

Relational

NonStop SQL supports the basic features of relational database management systems. What distinguish it from many other relational DBMS are the additional features providing excellent OLTP performance, availability, and scalability.

Revision #10 | Updated 11/21/2019 8:38 p.m.

View Current Viewing Revision #10 from 11/21/2019 8:38 p.m.

Website

https://www.hpe.com/us/en/servers/nonstop.html

Tech Docs

https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-c02148175

Developer

Tandem

Country of Origin

Start Year

1987

Acquired By

Project Type

Commercial

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