Обсуждение: Selecting names of indexes that are not dependent on constraints.

Hey all,<br /><br />How can I select names of indexes of table (or even whole schema) that are not dependent on
constraints?<br/><br />Unfortunately there is no way to select only "independent" indexes from pg_indexes view.<br
/><br/>How can I do it?<br /><br />Regards,<br />Dmitriy Igrishin<br /> 

Of course, I meant the indexes of which constraints do not depend. :)<br /><br /><div class="gmail_quote">2010/3/11
DmitriyIgrishin <span dir="ltr"><<a href="mailto:dmitigr@gmail.com">dmitigr@gmail.com</a>></span><br
/><blockquoteclass="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex;
padding-left:1ex;"> Hey all,<br /><br />How can I select names of indexes of table (or even whole schema) that are not
dependenton constraints?<br /><br />Unfortunately there is no way to select only "independent" indexes from pg_indexes
view.<br/><br />How can I do it?<br /><br />Regards,<br /><font color="#888888">Dmitriy Igrishin<br
/></font></blockquote></div><br/> 

Dmitriy Igrishin <dmitigr@gmail.com> writes:
> How can I select names of indexes of table (or even whole schema) that are
> not dependent on constraints?

Right at the moment, the only reliable way to tell whether an index is
associated with a constraint is to look for a pg_depend entry linking
the two.  Be careful to consider only "internal" dependencies, else you
may be fooled by foreign-key constraints that depend on indexes.
If you look into the pg_dump source code you will find an example.

9.0 will make this a tad simpler by keeping a "conindid" column in
pg_constraint.
        regards, tom lane