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Code review for UPDATE tab SET col = DEFAULT patch ... whack it around

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so it has some chance of working in rules ...
This commit is contained in:
Tom Lane
2003-07-03 16:34:26 +00:00
parent 7b1885bf98
commit 455891bf96
15 changed files with 186 additions and 114 deletions
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6
doc/src/sgml/ref/insert.sgml
View File

@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/insert.sgml,v 1.22 2003/04/26 23:56:51 petere Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/insert.sgml,v 1.23 2003/07/03 16:32:03 tgl Exp $
PostgreSQL documentation
-->
@ -33,7 +33,7 @@ INSERT INTO <replaceable class="PARAMETER">table</replaceable> [ ( <replaceable
<para>
The columns in the target list may be listed in any order.
Each column not present in the target list will be inserted
using a default value, either a declared default value
using a default value, either its declared default value
or null.
</para>
@ -77,7 +77,7 @@ INSERT INTO <replaceable class="PARAMETER">table</replaceable> [ ( <replaceable
<term><literal>DEFAULT VALUES</literal></term>
<listitem>
<para>
All columns will be filled their default values.
All columns will be filled with their default values.
</para>
</listitem>
</varlistentry>

37
doc/src/sgml/ref/update.sgml
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@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/update.sgml,v 1.22 2003/06/25 04:19:24 momjian Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/update.sgml,v 1.23 2003/07/03 16:32:12 tgl Exp $
PostgreSQL documentation
-->
@ -28,7 +28,8 @@ UPDATE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> SET <replacea
<para>
<command>UPDATE</command> changes the values of the specified
columns in all rows that satisfy the condition. Only the columns to
be modified need appear as columns in the statement.
be modified need be mentioned in the statement; columns not explicitly
<literal>SET</> retain their previous values.
</para>
<para>
@ -41,8 +42,9 @@ UPDATE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> SET <replacea
<para>
You must have the <literal>UPDATE</literal> privilege on the table
to update it, as well as the <literal>SELECT</literal>
privilege to any table whose values are read in the <replaceable
class="parameter">condition</replaceable>.
privilege to any table whose values are read in the
<replaceable class="parameter">expression</replaceable>s or
<replaceable class="parameter">condition</replaceable>.
</para>
</refsect1>
@ -72,7 +74,8 @@ UPDATE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> SET <replacea
<term><replaceable class="PARAMETER">expression</replaceable></term>
<listitem>
<para>
An expression or value to assign to the column.
An expression to assign to the column. The expression may use the
old values of this and other columns in the table.
</para>
</listitem>
</varlistentry>
@ -81,7 +84,8 @@ UPDATE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> SET <replacea
<term><literal>DEFAULT</literal></term>
<listitem>
<para>
This column will be filled with its default value.
Set the column to its default value (which will be NULL if no
specific default expression has been assigned to it).
</para>
</listitem>
</varlistentry>
@ -91,7 +95,7 @@ UPDATE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> SET <replacea
<listitem>
<para>
A list of table expressions, allowing columns from other tables
to appear in the <literal>WHERE</> condition.
to appear in the <literal>WHERE</> condition and the update expressions.
</para>
</listitem>
</varlistentry>
@ -100,9 +104,9 @@ UPDATE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> SET <replacea
<term><replaceable class="PARAMETER">condition</replaceable></term>
<listitem>
<para>
A value expression that returns a value of type
<type>boolean</type> that determines the rows which are to be
updated.
An expression that returns a value of type <type>boolean</type>.
Only rows for which this expression returns <literal>true</>
will be updated.
</para>
</listitem>
</varlistentry>
@ -135,9 +139,20 @@ UPDATE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> SET <replacea
column <structfield>kind</> of the table <literal>films</literal>:
<programlisting>
UPDATE filme SET kind = 'Dramatic' WHERE kind = 'Drama';
UPDATE films SET kind = 'Dramatic' WHERE kind = 'Drama';
</programlisting>
</para>
<para>
Adjust temperature entries and reset precipitation to its default
value in one row of the table <literal>weather</literal>:
<programlisting>
UPDATE weather SET temp_lo = temp_lo+1, temp_hi = temp_lo+15, prcp = DEFAULT
WHERE city = 'San Francisco' AND date = '2003-07-03';
</programlisting>
</para>
</refsect1>
<refsect1>