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体验新版 GitCode,发现更多精彩内容 >>
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f8645018
编写于
3月 23, 2000
作者:
B
Bruce Momjian
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+27
-21
doc/src/sgml/ref/lock.sgml
doc/src/sgml/ref/lock.sgml
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-20
src/template/aix_42
src/template/aix_42
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doc/src/sgml/ref/lock.sgml
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f8645018
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/lock.sgml,v 1.1
5 2000/03/23 21:38:57
momjian Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/lock.sgml,v 1.1
6 2000/03/23 22:25:35
momjian Exp $
Postgres documentation
-->
...
...
@@ -123,7 +123,7 @@ LOCK [ TABLE ] <replaceable class="PARAMETER">name</replaceable> IN SHARE ROW EX
</note>
<para>
This is the least restrictive lock mode
which conflicts only with
This is the least restrictive lock mode
. It conflicts only with
ACCESS EXCLUSIVE mode. It is intended to protect a table being
modified by concurrent <command>ALTER TABLE</command>,
<command>DROP TABLE</command> and <command>VACUUM</command>
...
...
@@ -137,8 +137,8 @@ LOCK [ TABLE ] <replaceable class="PARAMETER">name</replaceable> IN SHARE ROW EX
<listitem>
<note>
<para>
Automatically acquired by
any <command>SELECT FOR UPDATE</command> statement
.
While it is a
SHARE
lock, there is the intention to later upgrade
Automatically acquired by
<command>SELECT...FOR UPDATE</command>
.
While it is a
shared
lock, there is the intention to later upgrade
this to an EXCLUSIVE lock.
</para>
</note>
...
...
@@ -154,15 +154,15 @@ LOCK [ TABLE ] <replaceable class="PARAMETER">name</replaceable> IN SHARE ROW EX
<listitem>
<note>
<para>
Automatically acquired by any <command>UPDATE</command>,
<command>DELETE</command>, <command>INSERT</command> statement.
Automatically acquired by <command>UPDATE</command>,
<command>DELETE</command>, and <command>INSERT</command>
statements.
</para>
</note>
<para>
Conflicts with SHARE, SHARE ROW EXCLUSIVE, EXCLUSIVE and
ACCESS EXCLUSIVE modes. Generally means that a transaction
updated or inserted some tuples in a table.
ACCESS EXCLUSIVE modes.
</para>
</listitem>
</varlistentry>
...
...
@@ -172,8 +172,8 @@ LOCK [ TABLE ] <replaceable class="PARAMETER">name</replaceable> IN SHARE ROW EX
<listitem>
<note>
<para>
Automatically acquired by
any <command>CREATE INDEX</command> statement
.
Share-locks entire table.
Automatically acquired by
<command>CREATE INDEX</command>
.
Share-locks
the
entire table.
</para>
</note>
...
...
@@ -188,10 +188,14 @@ LOCK [ TABLE ] <replaceable class="PARAMETER">name</replaceable> IN SHARE ROW EX
<varlistentry>
<term>SHARE ROW EXCLUSIVE MODE</term>
<listitem>
<note>
<para>
This is like
an EXCLUSIVE lock
, but allows SHARE ROW locks
This is like
EXCLUSIVE MODE
, but allows SHARE ROW locks
by others.
</para>
</note>
<para>
Conflicts with ROW EXCLUSIVE, SHARE, SHARE ROW EXCLUSIVE,
EXCLUSIVE and ACCESS EXCLUSIVE modes.
</para>
...
...
@@ -202,11 +206,16 @@ LOCK [ TABLE ] <replaceable class="PARAMETER">name</replaceable> IN SHARE ROW EX
<term>EXCLUSIVE MODE</term>
<listitem>
<note>
<para>
This mode is yet more restrictive than SHARE ROW EXCLUSIVE.
It blocks all concurrent ROW SHARE/SELECT...FOR UPDATE queries.
</para>
</note>
<para>
Conflicts with ROW SHARE, ROW EXCLUSIVE, SHARE, SHARE ROW EXCLUSIVE,
EXCLUSIVE and ACCESS EXCLUSIVE modes. This mode is yet more
restrictive than that of SHARE ROW EXCLUSIVE; it blocks all concurrent
SHARE ROW/SELECT FOR UPDATE queries.
EXCLUSIVE and ACCESS EXCLUSIVE modes.
</para>
</listitem>
</varlistentry>
...
...
@@ -218,14 +227,11 @@ LOCK [ TABLE ] <replaceable class="PARAMETER">name</replaceable> IN SHARE ROW EX
<para>
Automatically acquired by <command>ALTER TABLE</command>,
<command>DROP TABLE</command>, <command>VACUUM</command> statements.
This is the most restrictive lock mode which conflicts with all other
lock modes and protects a locked table from any concurrent operations.
</para>
</note>
<para>
This is the most restrictive lock mode which conflicts with all other
lock modes and protects a locked table from any concurrent operations.
</para>
<note>
<para>
This lock mode is also acquired by an unqualified
...
...
src/template/aix_42
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f8645018
AROPT:crs
CFLAGS:-O2 -qmaxmem=16384 -qhalt=w -qsrcmsg -qlanglvl=extended -qlonglong
-qcpluscmt
CFLAGS:-O2 -qmaxmem=16384 -qhalt=w -qsrcmsg -qlanglvl=extended -qlonglong
SHARED_LIB:-lc
ALL:
SRCH_INC:
...
...
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