Jump to content
Wikipedia The Free Encyclopedia

Persistent programming language

From Wikipedia, the free encyclopedia
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
This article has multiple issues. Please help improve it or discuss these issues on the talk page . (Learn how and when to remove these messages)
This Computer science may be too technical for most readers to understand. Please help improve it to make it understandable to non-experts, without removing the technical details. (January 2025) (Learn how and when to remove this message)
This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.
Find sources: "Persistent programming language" – news · newspapers · books · scholar · JSTOR (February 2025) (Learn how and when to remove this message)
(Learn how and when to remove this message)

Programming languages that natively and seamlessly allow objects to continue existing after the program has been closed down are called persistent programming languages. JADE is one such language.

A persistent programming language is a programming language extended with constructs to handle persistent data. It is distinguished from embedded SQL in at least two ways:

In a persistent programming language:

  • The query language is fully integrated with the host language and both share the same type system.
  • Any format changes required between the host language and the database are carried out transparently.

In Embedded SQL:

  • Where the host language and data manipulation language have different type systems, code conversion operates outside of the OO type system, and hence has a higher chance of having undetected errors.
  • Format conversion must be handled explicitly and takes a substantial amount of code.

Using Embedded SQL, a programmer is responsible for writing explicit code to fetch data into memory or store data back to the database. In a persistent programming language, a programmer can manipulate persistent data without having to write such code explicitly.

The drawbacks of persistent programming languages include:

  • While they are powerful, it is easy to make programming errors that damage the database.
  • It is harder to do automatic high-level optimization.
  • They do not support declarative querying well.

Examples

See also

References

  1. ^ Greenes, Robert; Pappalardo, A Neil; Marble, Curt W; Barnett, G Octo (1969). "Design and implementation of a clinical data management system". Comput Biomed Res. 5 (Oct): 469–85. doi:10.1016/0010-4809(69)90012-3. PMID 11697375.
  2. ^ "Jade Software delivers Jade 7.1". ZDnet . Retrieved 21 December 2019.
  3. ^ "Quit Command | ObjectScript Tutorial | Caché & Ensemble 2018年1月4日 & 2018年1月5日".
Stub icon

This computer science article is a stub. You can help Wikipedia by expanding it.

AltStyle によって変換されたページ (->オリジナル) /