1998-02-17 16:29:55 +01:00
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PostgreSQL is a robust, next-generation, Object-Relational DBMS (ORDBMS),
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derived from the Berkeley Postgres database management system. While
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PostgreSQL retains the powerful object-relational data model, rich data types
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and easy extensibility of Postgres, it replaces the PostQuel query language
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with an extended subset of SQL.
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PostgreSQL is free and the complete source is available.
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Update postgresql to 7.1.1 Pkgsrc changes include splitting into:
postgresql-lib
postgresql-client
postgresql-server
postgresql-doc
with postgresql as a meta-package. Major changes from version 7.1.1
include:
Write-ahead Log (WAL) - To maintain database consistency in
case of an operating system crash, previous releases of PostgreSQL
have forced all data modifications to disk before each transaction
commit. With WAL, only one log file must be flushed to disk, greatly
improving performance. If you have been using -F in previous releases
to disable disk flushes, you may want to consider discontinuing its
use.
TOAST - Previous releases had a compiled-in row length limit,
typically 8 - 32 kB. This limit made storage of long text fields
difficult. With TOAST, long rows of any length can be stored with
good performance.
Outer Joins - We now support outer joins. The UNION/NOT IN
workaround for outer joins is no longer required. We use the SQL92
outer join syntax.
Function Manager - The previous C function manager did not
handle NULLs properly, nor did it support 64-bit CPU's (Alpha). The
new function manager does. You can continue using your old custom
functions, but you may want to rewrite them in the future to use the
new function manager call interface.
Complex Queries - A large number of complex queries that were
unsupported in previous releases now work. Many combinations of
views, aggregates, UNION, LIMIT, cursors, subqueries, and inherited
tables now work properly. Inherited tables are now accessed by
default. Subqueries in FROM are now supported.
Migration to 7.1.1
A dump/restore using pg_dump is required for those wishing to migrate
data from any previous release.
2001-05-14 16:52:36 +02:00
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This is the meta-package for the PostgreSQL database system.
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