IBM Peterlee Relational Test Vehicle (PRTV)

From Infogalactic: the planetary knowledge core
(Redirected from PRTV)
Jump to: navigation, search

PRTV (Peterlee Relational Test Vehicle) was the world's first relational database management system that could handle significant data volumes.

It was a relational query system with powerful query facilities, but very limited update facility and no simultaneous multiuser facility. PRTV was a follow-on from the very first relational implementation, IS1.

Features

PRTV included several firsts in the relational database area:

  • implemented relational optimizer [1]
  • implemented cost-based relational optimizer [2]
  • handle tables of 1,000 rows up to 10,000,000 rows[3]
  • user-defined functions (UDFs) within an RDB (also a large suite of built-in functions such as trigonometric and statistical)[4]
  • geographic information system based on an RDB (using UDFs such as point-in-polygon).[5]

PRTV was based on a relational algebra, Information Systems Base Language (ISBL) and followed the relational model very strictly. Even features such as user-defined functions were formalized within that model.[6] The PRTV team also introduced surrogates to the relational model[4] to help formalize relational update operations; and a formalisation for updating through views.[7] However neither of these was implemented within PRTV. PRTV emphatically did not implement NULL values, because this conception was introduced only in 1979.[8]

PRTV was itself never available as a product, but the Urban Management System[9] built on it was available as a limited IBM product.

References

<templatestyles src="Reflist/styles.css" />

Cite error: Invalid <references> tag; parameter "group" is allowed only.

Use <references />, or <references group="..." />
  1. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ 4.0 4.1 Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
Retrieved from "https://infogalactic.com/w/index.php?title=IBM_Peterlee_Relational_Test_Vehicle_(PRTV)&oldid=2036036"