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Add a security_barrier option for views.

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When a view is marked as a security barrier, it will not be pulled up
into the containing query, and no quals will be pushed down into it,
so that no function or operator chosen by the user can be applied to
rows not exposed by the view.  Views not configured with this
option cannot provide robust row-level security, but will perform far
better.

Patch by KaiGai Kohei; original problem report by Heikki Linnakangas
(in October 2009!).  Review (in earlier versions) by Noah Misch and
others.  Design advice by Tom Lane and myself.  Further review and
cleanup by me.
This commit is contained in:
Robert Haas
2011-12-22 16:15:57 -05:00
parent f90dd28062
commit 0e4611c023
22 changed files with 300 additions and 35 deletions
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13
doc/src/sgml/ref/create_view.sgml
View File

@@ -22,6 +22,7 @@ PostgreSQL documentation
<refsynopsisdiv>
<synopsis>
CREATE [ OR REPLACE ] [ TEMP | TEMPORARY ] VIEW <replaceable class="PARAMETER">name</replaceable> [ ( <replaceable class="PARAMETER">column_name</replaceable> [, ...] ) ]
[ WITH ( <replaceable class="PARAMETER">view_option_name</replaceable> [= <replaceable class="PARAMETER">view_option_value</replaceable>] [, ... ] ) ]
AS <replaceable class="PARAMETER">query</replaceable>
</synopsis>
</refsynopsisdiv>
@@ -98,6 +99,18 @@ CREATE [ OR REPLACE ] [ TEMP | TEMPORARY ] VIEW <replaceable class="PARAMETER">n
</listitem>
</varlistentry>
<varlistentry>
<term><literal>WITH ( <replaceable class="PARAMETER">view_option_name</replaceable> [= <replaceable class="PARAMETER">view_option_value</replaceable>] [, ... ] )</literal></term>
<listitem>
<para>
This clause specifies optional parameters for a view; currently, the
only suppored parameter name is <literal>security_barrier</literal>,
which should be enabled when a view is intended to provide row-level
security. See <xref linkend="rules-privileges"> for full details.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">query</replaceable></term>
<listitem>