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Reformat the "major changes" to 72 or so columns.

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Peter Eisentraut 2001-03-17 18:15:36 +00:00
parent 11fd91579a
commit 5dc0e67bd5
1 changed files with 19 additions and 17 deletions
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34
HISTORY
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@ -11,32 +11,34 @@ PostgreSQL code for many years.
Major changes in this release:
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.
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 8k - 32k. This limit made storage of long text fields
difficult. With TOAST, long rows of any length can be stored with good
performance.
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
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.
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