8000 Add input parameters for LOCK TABLE. Still needs explanation from Vadim. · postgrespro/postgres@ebfbb79 · GitHub
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Thomas G. Lockhart
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Add input parameters for LOCK TABLE. Still needs explanation from Vadim.
Fix markup.
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‎doc/src/sgml/ref/lock.sgml

Lines changed: 163 additions & 91 deletions
Original file line numberDiff line numberDiff line change
@@ -1,84 +1,156 @@
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<REFENTRY ID="SQL-LOCK">
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<REFMETA>
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<REFENTRYTITLE>
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<refentry id="SQL-LOCK">
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<refmeta>
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<refentrytitle>
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LOCK
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</REFENTRYTITLE>
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<REFMISCINFO>SQL - Language Statements</REFMISCINFO>
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</REFMETA>
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<REFNAMEDIV>
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<REFNAME>
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</refentrytitle>
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<refmiscinfo>SQL - Language Statements</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>
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LOCK
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</REFNAME>
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<REFPURPOSE>
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</refname>
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<refpurpose>
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Explicit lock of a table inside a transaction
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</REFPURPOSE>
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</refpurpose>
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</refnamediv>
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<REFSYNOPSISDIV>
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<REFSYNOPSISDIVINFO>
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<DATE>1998-09-24</DATE>
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</REFSYNOPSISDIVINFO>
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<SYNOPSIS>
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LOCK [ TABLE ] [IN [ROW|ACCESS] [SHARE|EXCLUSIVE] | [SHARE ROW EXCLUSIVE] MODE]
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<REPLACEABLE CLASS="PARAMETER">table</REPLACEABLE>
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</SYNOPSIS>
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<refsynopsisdiv>
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<refsynopsisdivinfo>
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<date>1998-09-24</date>
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</refsynopsisdivinfo>
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<synopsis>
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LOCK [ TABLE ] <replaceable class="PARAMETER">table</replaceable>
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LOCK [ TABLE ] <replaceable class="PARAMETER">table</replaceable> IN [ ROW | ACCESS ] { SHARE | EXCLUSIVE } MODE
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LOCK [ TABLE ] <replaceable class="PARAMETER">table</replaceable> IN SHARE ROW EXCLUSIVE MODE
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</synopsis>
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<REFSECT2 ID="R2-SQL-LOCK-1">
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<REFSECT2INFO>
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<DATE>1998-09-01</DATE>
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</REFSECT2INFO>
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<TITLE>
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<refsect2 id="R2-SQL-LOCK-1">
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<refsect2info>
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<date>1998-09-01</date>
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</refsect2info>
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<title>
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Inputs
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</TITLE>
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<PARA>
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</PARA>
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<VARIABLELIST>
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<VARLISTENTRY>
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<TERM>
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<REPLACEABLE CLASS="PARAMETER">table</REPLACEABLE>
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</TERM>
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<LISTITEM>
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<PARA>
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The name of an existing table to lock.
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</para>
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</listitem>
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</varlistentry>
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</VARIABLELIST>
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</REFSECT2>
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</title>
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<para>
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<variablelist>
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<varlistentry>
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<term>
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<replaceable class="PARAMETER">table</replaceable>
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</term>
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<listitem>
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<para>
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The name of an existing table to lock.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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SHARE MODE
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</term>
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<listitem>
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<para>
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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EXCLUSIVE MODE
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</term>
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<listitem>
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<para>
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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ROW SHARE MODE
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</term>
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<listitem>
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<para>
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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ROW EXCLUSIVE MODE
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</term>
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<listitem>
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<para>
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</para>
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</listitem>
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</varlistentry>
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<REFSECT2 ID="R2-SQL-LOCK-2">
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<REFSECT2INFO>
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<DATE>1998-09-24</DATE>
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</REFSECT2INFO>
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<TITLE>
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<varlistentry>
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<term>
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ACCESS SHARE MODE
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</term>
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<listitem>
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<para>
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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ACCESS EXCLUSIVE MODE
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</term>
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<listitem>
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<para>
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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SHARE ROW EXCLUSIVE MODE
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</term>
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<listitem>
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<para>
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect2>
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<refsect2 id="R2-SQL-LOCK-2">
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<refsect2info>
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<date>1998-09-24</date>
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</refsect2info>
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<title>
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Outputs
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</TITLE>
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<PARA>
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</title>
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<para>
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<VARIABLELIST>
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<TERM>
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ERROR <REPLACEABLE CLASS="PARAMETER">table</REPLACEABLE>: Table does not exist.
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</TERM>
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<LISTITEM>
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<PARA>
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Message returned if <REPLACEABLE CLASS="PARAMETER">table</REPLACEABLE>
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<variablelist>
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<varlistentry>
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<term>
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ERROR <replaceable class="PARAMETER">table</replaceable>: Table does not exist.
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</term>
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<listitem>
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<para>
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Message returned if <replaceable class="PARAMETER">table</replaceable>
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does not exist.
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</para>
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</listitem>
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</varlistentry>
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</VARIABLELIST>
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</variablelist>
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</para>
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</REFSECT2>
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</REFSYNOPSISDIV>
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</refsect2>
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</refsynopsisdiv>
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<REFSECT1 ID="R1-SQL-LOCK-1">
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<REFSECT1INFO>
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<DATE>1998-09-24</DATE>
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</REFSECT1INFO>
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<TITLE>
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<refsect1 id="R1-SQL-LOCK-1">
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<refsect1info>
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<date>1998-09-24</date>
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</refsect1info>
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<title>
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Description
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</TITLE>
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<PARA>
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</title>
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<para>
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By default, <command>LOCK</command> locks in exclusive mode a table inside
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a transaction. Various options allow shared access, or row-level locking
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control. The classic use for this is
@@ -112,13 +184,13 @@
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</para>
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</note>
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<REFSECT2 ID="R2-SQL-LOCK-3">
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<REFSECT2INFO>
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<DATE>1998-09-24</DATE>
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</REFSECT2INFO>
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<TITLE>
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<refsect2 id="R2-SQL-LOCK-3">
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<refsect2info>
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<date>1998-09-24</date>
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</refsect2info>
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<title>
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Notes
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</TITLE>
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</title>
122194
<para>
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<command>LOCK</command> is a <productname>Postgres</productname>
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language extension.
@@ -134,16 +206,16 @@
134206
</para>
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</note>
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</para>
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</REFSECT2>
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</refsect2>
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</refsect1>
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<REFSECT1 ID="R1-SQL-LOCK-2">
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<TITLE>
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<refsect1 id="R1-SQL-LOCK-2">
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<title>
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Usage
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</TITLE>
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<PARA>
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</PARA>
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<ProgramListing>
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</title>
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<para>
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</para>
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<programlisting>
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--Explicit locking to prevent deadlock:
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--
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BEGIN WORK;
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UPDATE films SET len = INTERVAL '100 minute'
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WHERE len = INTERVAL '117 minute';
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COMMIT WORK;
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</ProgramListing>
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</programlisting>
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</REFSECT1>
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</refsect1>
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<REFSECT1 ID="R1-SQL-LOCK-3">
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<TITLE>
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<refsect1 id="R1-SQL-LOCK-3">
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<title>
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Compatibility
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</TITLE>
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</title>
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<REFSECT2 ID="R2-SQL-LOCK-4">
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<REFSECT2INFO>
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<DATE>1998-09-24</DATE>
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</REFSECT2INFO>
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<TITLE>
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<refsect2 id="R2-SQL-LOCK-4">
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<refsect2info>
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<date>1998-09-24</date>
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</refsect2info>
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<title>
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SQL92
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</TITLE>
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<PARA>
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</title>
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<para>
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There is no <command>LOCK TABLE</command> in <acronym>SQL92</acronym>,
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which instead uses <command>SET TRANSACTION</command> to specify
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concurrency level on transactions. We support that too.
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</para>
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</refsect2>
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</refsect1>
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</REFENTRY>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:

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