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More release note updates.
This commit is contained in:
Bruce Momjian
parent
0f455b346e
commit
31ef0588c8
@ -1,5 +1,5 @@
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<!--
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<!--
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$PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian Exp $
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$PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.345 2005/08/23 14:54:06 momjian Exp $
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-->
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-->
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<appendix id="release">
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<appendix id="release">
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||||||
@ -52,14 +52,22 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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<varlistentry>
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<varlistentry>
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<term>
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<term>
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Add in-memory bitmaps which allows multiple indexes to be merged in a
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Add in-memory bitmaps which allows multiple indexes to be merged
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single query (Tom)
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in a single query (Tom)
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</term>
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</term>
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<listitem>
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<listitem>
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<para>
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<para>
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This allows multiple indexes to be combined to access a single
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In previous releases, only a single index could be used to do
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table.
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lookups on a table. With this feature, if a query has WHERE
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tab.col1 = 4 and tab.col2 = 9, and there is no multicolumn index
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on col1 and col2, but there is an index on col1 and another on
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col2, it is possible to do lookups on the col1 index and the
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col2 index and combine them in memory to do heap lookups on rows
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matching both the col1 and col2 restrictions. This is very
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useful in environments that have a lot of unstructured queries
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where it is impossible to create indexes that match all possible
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access conditions.
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</para>
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</para>
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</listitem>
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</listitem>
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</varlistentry>
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</varlistentry>
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@ -72,25 +80,65 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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<listitem>
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<listitem>
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<para>
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<para>
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Two-phase commit allows transactions to be "prepared" on several
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Two-phase commit allows transactions to be "prepared" on several
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computers, and once all computers have successfully prepared their
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computers, and once all computers have successfully prepared
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transactions (and can not be rolled back) all transactions can be
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their transactions (none failed), all transactions can be
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committed. Even if a machine crashes after a prepare, the prepared
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committed. Even if a machine crashes after a prepare, the
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transaction can be committed after it is restarted. New syntax
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prepared transaction can be committed after it is restarted. New
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includes PREPARE TRANSACTION and COMMIT/ROLLBACK PREPARED. A new
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syntax includes PREPARE TRANSACTION and COMMIT/ROLLBACK
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system view pg_prepared_xacts has also been added.
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PREPARED. A new system view pg_prepared_xacts has also been
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added.
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</para>
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</para>
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</listitem>
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</listitem>
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</varlistentry>
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</varlistentry>
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<varlistentry>
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<varlistentry>
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<term>
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<term>
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Replace pg_shadow and pg_group by new role-capable catalogs pg_authid
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Create a new role system that replaces users and groups
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and pg_auth_members.
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(Stephen Frost)
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</term>
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</term>
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<listitem>
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<listitem>
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<para>
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<para>
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Add SET ROLE (Stephen Frost)
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Roles are a combination of users and groups. Like users, they
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can have login capability, and like groups, a role can have
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other roles as members. Roles basically remove the distinction
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between users and groups. For example, a role can:
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</para>
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<itemizedlist>
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<listitem>
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<para>
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Have optionally have login capability
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</para>
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</listitem>
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<listitem>
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<para>
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Own objects
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</para>
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</listitem>
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<listitem>
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<para>
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Inherit permission from other member roles
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</para>
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</listitem>
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<listitem>
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<para>
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Switch to another member role using SET ROLE
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</para>
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</listitem>
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</itemizedlist>
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<para>
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So, once a user logs into a role, she inherits capabilities of
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the login role plus any inherited roles, and can use SET ROLE to
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switch to other member roles. This change also replaces
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pg_shadow and pg_group by with new role-capable catalogs
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pg_authid and pg_auth_members. The old tables are redefined as
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views on the new role tables.
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</para>
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</para>
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</listitem>
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</listitem>
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</varlistentry>
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</varlistentry>
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@ -102,7 +150,9 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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|
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<listitem>
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<listitem>
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<para>
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<para>
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Add SET ROLE (Stephen Frost)
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Moving pgautovacuum from /contrib allows it to be automatically
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started and stoped in sync with the database server, and allows
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for pgautovacuum to be configured from postgresql.conf.
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</para>
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</para>
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</listitem>
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</listitem>
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</varlistentry>
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</varlistentry>
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@ -114,10 +164,11 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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<listitem>
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<listitem>
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<para>
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<para>
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While PostgreSQL's MVCC locking allows SELECT to never be blocked by writers
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While PostgreSQL's MVCC locking allows SELECT to never be
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and therefore does not need shared row locks for typical operations,
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blocked by writers and therefore does not need shared row locks
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shared locks are useful for applications that require shared row locking,
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for typical operations, shared locks are useful for applications
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and to reduce the locking requirements to maintain referential integrity.
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that require shared row locking, and to reduce the locking
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requirements to maintain referential integrity.
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</para>
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</para>
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</listitem>
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</listitem>
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</varlistentry>
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</varlistentry>
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@ -159,7 +210,7 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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<listitem>
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<listitem>
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<para>
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<para>
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Cause input of a zero-length string ('') for float4/float8/oid to throw
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Cause input of a zero-length strings ('') for float4/float8/oid to throw
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an error, rather than treat it as a zero (Neil)
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an error, rather than treat it as a zero (Neil)
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</para>
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</para>
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<para>
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<para>
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@ -170,11 +221,11 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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|
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<listitem>
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<listitem>
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<para>
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<para>
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Make default_with_oids default to false (Neil)
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Change the default for default_with_oids to false (Neil)
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</para>
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</para>
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<para>
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<para>
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With this option set to false, user-created tables no
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With this option set to false, user-created tables no
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have an the usually-invisible OID column unless WITH OIDS
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longer have an the usually-invisible OID column unless WITH OIDS
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is specified in CREATE TABLE. Though OIDs have existed in all previous
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is specified in CREATE TABLE. Though OIDs have existed in all previous
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releases of PostgreSQL, their use is limited because they are only four
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releases of PostgreSQL, their use is limited because they are only four
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bytes long and the counter is unique across all installed databases.
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bytes long and the counter is unique across all installed databases.
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@ -185,25 +236,49 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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<listitem>
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<listitem>
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<para>
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<para>
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Add E'' syntax so eventually normal strings can treat backslashes
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Add E'' syntax so eventually ordinary strings can treat backslashes
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literally (Bruce)
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literally (Bruce)
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</para>
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</para>
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<para>
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<para>
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Currently PostgreSQL considers a backslash to be a special character
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Currently PostgreSQL processes a backslash in a string
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so the character after the backslash is treated specially. While this
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as preceeding a character that requires special processing, e.g.
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allows easy entry of special values, it is non-standard and makes
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\n or \010. While this allows easy entry of special values, it is
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porting of application from other databases more difficult. For this
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non-standard and makes porting of application from other
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reason, the PostgreSQL project is moving to remove the special meaning
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databases more difficult. For this reason, the PostgreSQL project
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of backslashes in strings, and allow only an E preceeding a string to
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is planning to remove the special meaning of backslashes in
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turn on the special handling of backslashes. For this reason, this
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strings. For backward compatibility and for users who want
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release adds several new GUC variables related to backslash
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special backslash procesing, a new string type will be created.
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processing:
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This new string type is formed by having an E preceed
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the single quote that starts the string, e.g. E'hi\n'.
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escape_string_warning - warn about backslashes in non-E strings
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While this release does not change the handling of backslashes in
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escape_string_syntax - does this release support the E'' syntax?
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strings, it does add several new GUC variables to help users
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standard_conforming_strings - does this release treat backslashes
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migrate applications for future releases:
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literally in non-E strings
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</para>
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</para>
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<itemizedlist>
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<listitem>
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<para>
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escape_string_warning - warn about backslashes in ordinary
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(non-E) strings
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</para>
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</listitem>
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<listitem>
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<para>
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escape_string_syntax - does this release support the E'' syntax?
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</para>
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</listitem>
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<listitem>
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|
<para>
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|
standard_conforming_strings - does this release treat
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backslashes literally in normal strings?
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</para>
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</listitem>
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</itemizedlist>
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<para>
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<para>
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The last two values are read-only and should assist in the porting of
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The last two values are read-only and should assist in the porting of
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applications. Applications can retrieve these values to know how
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applications. Applications can retrieve these values to know how
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@ -244,8 +319,8 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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(Tom)
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(Tom)
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</para>
|
</para>
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<para>
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<para>
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These have never been documented and complicated the use of modulus
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These have never been documented and complicated the use of the modulus
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(%) with negative numbers.
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operator (%) with negative numbers.
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</para>
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</para>
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</listitem>
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</listitem>
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@ -274,7 +349,6 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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<listitem>
|
<listitem>
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<para>
|
<para>
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Improve rtree index capabilities and performance (Neil)
|
Improve rtree index capabilities and performance (Neil)
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Replaced by contrib?
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</para>
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</para>
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</listitem>
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</listitem>
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|
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@ -286,14 +360,13 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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|
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<listitem>
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<listitem>
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<para>
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<para>
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Overhaul internal API in several areas to improve performance
|
Overhaul internal API in several areas
|
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</para>
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</para>
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</listitem>
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</listitem>
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|
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<listitem>
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<listitem>
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<para>
|
<para>
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Change WAL CRC records from 64bit to 32bit to improve performance
|
Change WAL CRC records from 64bit to 32bit (Tom)
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(Tom)
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</para>
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</para>
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</listitem>
|
</listitem>
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|
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@ -326,8 +399,7 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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|
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<listitem>
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<listitem>
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<para>
|
<para>
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Allow concurrent GIST index access, greatly improving performance
|
Allow concurrent GIST index access (Teodor, Oleg)
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(Teodor, Oleg)
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</para>
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</para>
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</listitem>
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</listitem>
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|
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@ -340,7 +412,7 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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PostgreSQL writes a complete copy of each database disk page to WAL
|
PostgreSQL writes a complete copy of each database disk page to WAL
|
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the first time it is modified after a checkpoint. This turns off that
|
the first time it is modified after a checkpoint. This turns off that
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functionality for users with battery-backed disk caches where partial
|
functionality for users with battery-backed disk caches where partial
|
||||||
page writes can not happen.
|
page writes cannot happen.
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</para>
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</para>
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</listitem>
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</listitem>
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|
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@ -388,7 +460,7 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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|
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<listitem>
|
<listitem>
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||||||
<para>
|
<para>
|
||||||
Prevent problems due to transaction ID wraparound (Tom)
|
Prevent problems due to transaction ID (XID) wraparound (Tom)
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||||||
</para>
|
</para>
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<para>
|
<para>
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||||||
This was accomplished by warning the transaction counter is
|
This was accomplished by warning the transaction counter is
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@ -400,8 +472,8 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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|
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<listitem>
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<listitem>
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||||||
<para>
|
<para>
|
||||||
Fix problem of OID wraparound conflicting with existing system objects
|
Fix problem of object ID (OID) wraparound conflicting
|
||||||
(Tom)
|
with existing system objects (Tom)
|
||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
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|
|
||||||
@ -439,24 +511,8 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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|||||||
|
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||||||
<listitem>
|
<listitem>
|
||||||
<para>
|
<para>
|
||||||
Allow Kerberos name and user name case sensitivity to be specified from
|
Allow Kerberos name and user name case sensitivity to be
|
||||||
postgresql.conf (Magnus)
|
specified in postgresql.conf (Magnus)
|
||||||
</para>
|
|
||||||
</listitem>
|
|
||||||
|
|
||||||
<listitem>
|
|
||||||
<para>
|
|
||||||
Add log_line_prefix options for millisecond timestamps (%m) and
|
|
||||||
remote host (%h) (Ed L.)
|
|
||||||
</para>
|
|
||||||
</listitem>
|
|
||||||
|
|
||||||
<listitem>
|
|
||||||
<para>
|
|
||||||
Add WAL logging for GIST indexes (Teodor, Oleg)
|
|
||||||
</para>
|
|
||||||
<para>
|
|
||||||
GIST indexes now work for online backup and crash recovery
|
|
||||||
</para>
|
</para>
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||||||
</listitem>
|
</listitem>
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|
|
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@ -473,18 +529,34 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
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|
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||||||
<listitem>
|
<listitem>
|
||||||
<para>
|
<para>
|
||||||
Remove old *.backup files when we do pg_stop_backup() (Bruce)
|
Add log_line_prefix options for millisecond timestamps (%m) and
|
||||||
</para>
|
remote host (%h) (Ed L.)
|
||||||
<para>
|
|
||||||
This prevents a large number of *.backup files from existing in
|
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||||||
pg_xlog/.
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</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
|
|
||||||
<listitem>
|
<listitem>
|
||||||
<para>
|
<para>
|
||||||
Add GUC variables to control keep-alive times for idle, interval, and
|
Add WAL logging for GIST indexes (Teodor, Oleg)
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||||||
count (Oliver Jowett)
|
</para>
|
||||||
|
<para>
|
||||||
|
GIST indexes now work for point-in-time recovery and crash recovery
|
||||||
|
</para>
|
||||||
|
</listitem>
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||||||
|
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
Remove old *.backup files when we do pg_stop_backup() (Bruce)
|
||||||
|
</para>
|
||||||
|
<para>
|
||||||
|
This prevents a large number of *.backup files from existing in
|
||||||
|
/seemspg_xlog.
|
||||||
|
</para>
|
||||||
|
</listitem>
|
||||||
|
|
||||||
|
<listitem>
|
||||||
|
<para>
|
||||||
|
Add GUC variables to control TCP/IP keep-alive times for idle,
|
||||||
|
interval, and count (Oliver Jowett)
|
||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
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||||||
|
|
||||||
@ -492,6 +564,12 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
|
|||||||
<para>
|
<para>
|
||||||
Add per-user and per-database connection limits (Petr Jelinek)
|
Add per-user and per-database connection limits (Petr Jelinek)
|
||||||
</para>
|
</para>
|
||||||
|
<para>
|
||||||
|
Using ALTER USER and ALTER DATABASE, limits can not be enforced
|
||||||
|
on the maximum number of users who can connect as as a specific
|
||||||
|
uesr or to a specific database. Setting the limit to zero
|
||||||
|
disables user or database connections.
|
||||||
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
|
|
||||||
</itemizedlist>
|
</itemizedlist>
|
||||||
@ -513,6 +591,9 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
|
|||||||
Fix HAVING without aggregate functions and no GROUP BY to behave
|
Fix HAVING without aggregate functions and no GROUP BY to behave
|
||||||
as if the main query returns a single group (Tom)
|
as if the main query returns a single group (Tom)
|
||||||
</para>
|
</para>
|
||||||
|
<para>
|
||||||
|
Previously, such a case would treat the HAVING clause as WHERE
|
||||||
|
clause.
|
||||||
</listitem>
|
</listitem>
|
||||||
|
|
||||||
<listitem>
|
<listitem>
|
||||||
@ -520,6 +601,11 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
|
|||||||
Add USING clause to allow additional tables to be specified to DELETE
|
Add USING clause to allow additional tables to be specified to DELETE
|
||||||
(Euler Taveira de Oliveira)
|
(Euler Taveira de Oliveira)
|
||||||
</para>
|
</para>
|
||||||
|
<para>
|
||||||
|
In prior releases, there was no clear method for specifying
|
||||||
|
additional tables to be used for joins in a DELETE statement.
|
||||||
|
UPDATE already has a FROM clause for this purpose.
|
||||||
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
|
|
||||||
<listitem>
|
<listitem>
|
||||||
@ -527,7 +613,7 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
|
|||||||
Add support for \x hex escapes in backend and ecpg strings (Bruce)
|
Add support for \x hex escapes in backend and ecpg strings (Bruce)
|
||||||
</para>
|
</para>
|
||||||
<para>
|
<para>
|
||||||
This supports the typical C standard \x escape. Octal was already
|
This is just like the standar C \x escape syntax. Octal was already
|
||||||
supported.
|
supported.
|
||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
@ -537,10 +623,10 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
|
|||||||
Add BETWEEN SYMMETRIC query syntax (Pavel Stehule)
|
Add BETWEEN SYMMETRIC query syntax (Pavel Stehule)
|
||||||
</para>
|
</para>
|
||||||
<para>
|
<para>
|
||||||
This feature allows BETWEEN comparisons without requiring the first
|
This feature allows BETWEEN comparisons without requiring the
|
||||||
value to be less than the second. For example, 2 BETWEEN [ASYMMETRIC] 3 AND 1
|
first value to be less than the second. For example, 2 BETWEEN
|
||||||
returns false, while 2 BETWEEN SYMMETRIC 3 AND 1 returns true. BETWEEN
|
[ASYMMETRIC] 3 AND 1 returns false, while 2 BETWEEN SYMMETRIC 3
|
||||||
ASYMMETRIC was already supported.
|
AND 1 returns true. BETWEEN ASYMMETRIC was already supported.
|
||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
|
|
||||||
@ -551,7 +637,7 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
|
|||||||
<para>
|
<para>
|
||||||
While SET statement_timeout allows a query taking over a certain
|
While SET statement_timeout allows a query taking over a certain
|
||||||
amount of time to be cancelled, the NO WAIT option allows a query to
|
amount of time to be cancelled, the NO WAIT option allows a query to
|
||||||
be canceled as soon as a SELECT ... FOR UPDATE/SHARE can not
|
be canceled as soon as a SELECT ... FOR UPDATE/SHARE cannot
|
||||||
immediately acquire a row lock.
|
immediately acquire a row lock.
|
||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
@ -1418,15 +1504,6 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.344 2005/08/23 12:47:30 momjian
|
|||||||
</para>
|
</para>
|
||||||
</listitem>
|
</listitem>
|
||||||
|
|
||||||
<listitem>
|
|
||||||
<para>
|
|
||||||
Replace rtree index code with code from /contrib/rtree_gist (Tom)
|
|
||||||
</para>
|
|
||||||
<para>
|
|
||||||
The improved capabilities of GIST indexes made this possible.
|
|
||||||
</para>
|
|
||||||
</listitem>
|
|
||||||
|
|
||||||
</itemizedlist>
|
</itemizedlist>
|
||||||
</sect3>
|
</sect3>
|
||||||
|
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user