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<chapter id="pygresql">

<title><application>PyGreSQL</application> - <application>Python</application> Interface</title>

programs. You can prompt the user for a value, put it in the

default variable, and forget it, without having to modify your

environment. The support for default variables can be disabled by

setting the <acronym>-DNO_DEF_VAR</acronym> option in the Python

setting the <option>-DNO_DEF_VAR</option> option in the Python

Setup file. Methods relative to this are specified by te tag [DV].

</para>

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PostgreSQL documentation

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<refsect2info>

<date>1998-09-24</date>

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<title>

<acronym>Extensions</acronym>

</title>

<title>Extensions</title>

<para>

<productname>PostgreSQL</productname> allows one to omit

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PostgreSQL documentation

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pg_amproc, pg_operator</filename> and <filename>pg_opclass</filename>).

Unfortunately, there is no simple command to do this. We will demonstrate

how to modify these catalogs through a running example: a new operator

class for the<acronym>B-tree</acronym> access method that stores and

class for the B-tree access method that stores and

sorts complex numbers in ascending absolute value order.

</para>

</sect1>

</para>

<para>

The <acronym>object ID</acronym> of the row in

The <acronym>OID</acronym> of the row in

<filename>pg_am</filename> is used as a foreign key in a lot of other

tables. You do not need to add a new row to this table; all that

you are interested in is the <acronym>object ID</acronym> of the access

you are interested in is the <acronym>OID</acronym> of the access

method you want to extend:

<screen>