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Initial round of tweakage for man pages

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This commit is contained in:
Peter Eisentraut
2001-11-18 20:35:02 +00:00
parent 31578cdeac
commit 17f0b55d15
12 changed files with 61 additions and 57 deletions
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14
doc/src/sgml/ref/alter_table.sgml
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@@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.31 2001/11/10 20:13:37 tgl Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.32 2001/11/18 20:35:02 petere Exp $
Postgres documentation
-->
@@ -161,14 +161,14 @@ ALTER TABLE <replaceable class="PARAMETER">table</replaceable>
<para>
<command>ALTER TABLE</command> changes the definition of an existing table.
The <literal>ADD COLUMN</literal> form adds a new column to the table
using the same syntax as <xref linkend="SQL-CREATETABLE">.
using the same syntax as <xref linkend="SQL-CREATETABLE" endterm="SQL-CREATETABLE-TITLE">.
The <literal>ALTER COLUMN SET/DROP DEFAULT</literal> forms
allow you to set or remove the default for the column. Note that defaults
only apply to subsequent <command>INSERT</command> commands; they do not
cause rows already in the table to change.
The <literal>ALTER COLUMN SET STATISTICS</literal> form allows you to
set the statistics-gathering target for subsequent
<xref linkend="sql-analyze"> operations.
<xref linkend="sql-analyze" endterm="sql-analyze-title"> operations.
The <literal>RENAME</literal> clause causes the name of a table or column
to change without changing any of the data contained in
the affected table. Thus, the table or column will
@@ -176,7 +176,7 @@ ALTER TABLE <replaceable class="PARAMETER">table</replaceable>
executed.
The ADD <replaceable class="PARAMETER">table constraint definition</replaceable> clause
adds a new constraint to the table using the same syntax as <xref
linkend="SQL-CREATETABLE">.
linkend="SQL-CREATETABLE" endterm="SQL-CREATETABLE-TITLE">.
The DROP CONSTRAINT <replaceable class="PARAMETER">constraint</replaceable> clause
drops all constraints on the table (and its children) that match <replaceable class="PARAMETER">constraint</replaceable>.
The OWNER clause changes the owner of the table to the user <replaceable class="PARAMETER">
@@ -204,7 +204,7 @@ ALTER TABLE <replaceable class="PARAMETER">table</replaceable>
You can use the <literal>SET DEFAULT</literal> form
of <command>ALTER TABLE</command> to set the default later.
(You may also want to update the already existing rows to the
new default value, using <xref linkend="sql-update">.)
new default value, using <xref linkend="sql-update" endterm="sql-update-title">.)
</para>
<para>
@@ -212,10 +212,10 @@ ALTER TABLE <replaceable class="PARAMETER">table</replaceable>
dependencies are not yet checked. The CASCADE option is unsupported.
Currently DROP CONSTRAINT drops only CHECK constraints.
To remove a PRIMARY or UNIQUE constraint, drop the
relevant index using the <xref linkend="SQL-DROPINDEX"> command.
relevant index using the <xref linkend="SQL-DROPINDEX" endterm="sql-dropindex-title"> command.
To remove FOREIGN KEY constraints you need to recreate
and reload the table, using other parameters to the
<xref linkend="SQL-CREATETABLE"> command.
<xref linkend="SQL-CREATETABLE" endterm="sql-createtable-title"> command.
</para>
<para>
For example, to drop all constraints on a table <literal>distributors</literal>: