determined at compile time.

Since the database server uses the same default, you will not have

to specify the port in most cases. The default user name is your

Unix user name, as is the default database name. Note that you cannot

operating-system user name, as is the default database name.

Note that you cannot

just connect to any database under any user name. Your database

administrator should have informed you about your access rights.

</para>

<varlistentry>

<term><literal>\g</literal> [{<replaceable class="parameter">filename</replaceable>| <literal>|</literal><replaceable class="parameter">command</replaceable> } ]</term>

<term><literal>\g [ <replaceable class="parameter">filename</replaceable>]</literal></term>

<listitem>

<para>

Sends the current query input buffer to the server and

Sends the current query input buffer to the server, and

optionally stores the query's output in <replaceable

class="parameter">filename</replaceable> or pipes the output

into a separate Unixshellexecuting <replaceable

to theshellcommand <replaceable

class="parameter">command</replaceable>. The file or command is

written to only if the query successfully returns zero or more tuples,

not if the query fails or is a non-data-returning SQL command.

</varlistentry>

<varlistentry>

<term><literal>\gset</literal> [ <replaceable class="parameter">prefix</replaceable> ]</term>

<term><literal>\gset [ <replaceable class="parameter">prefix</replaceable> ]</literal></term>

<listitem>

<para>

<varlistentry>

<term><literal>\H</literal></term>

<term><literal>\H</literal> or <literal>\html</literal></term>

<listitem>

<para>

Turns on <acronym>HTML</acronym> query output format. If the

<varlistentry>

<term><literal>\i <replaceable class="parameter">filename</replaceable></literal></term>

<term><literal>\i</literal> or <literal>\include</literal> <replaceable class="parameter">filename</replaceable></term>

<listitem>

<para>

Reads input from the file <replaceable

<varlistentry>

<term><literal>\ir <replaceable class="parameter">filename</replaceable></literal></term>

<term><literal>\ir</literal> or <literal>\include_relative</literal> <replaceable class="parameter">filename</replaceable></term>

<listitem>

<para>

The <literal>\ir</> command is similar to <literal>\i</>, but resolves

<varlistentry>

<term><literal>\o</literal>[ {<replaceable class="parameter">filename</replaceable>| <literal>|</literal><replaceable class="parameter">command</replaceable>} ]</term>

<term><literal>\o</literal>or <literal>\out [<replaceable class="parameter">filename</replaceable>]</literal></term>

<listitem>

<para>

Saves future query results to the file <replaceable

class="parameter">filename</replaceable> orpipes future results

into a separate Unixshellto execute <replaceable

class="parameter">command</replaceable>. If noarguments are

specified, the query outputwill be reset to the standard output.

Arranges to save future query results to the file <replaceable

class="parameter">filename</replaceable> orpipe future results

to theshellcommand <replaceable

class="parameter">command</replaceable>. If noargument is

specified, the query outputis reset to the standard output.

</para>

<para><quote>Query results</quote> includes all tables, command

<varlistentry>

<term><literal>\p</literal></term>

<term><literal>\p</literal> or <literal>\print</literal></term>

<listitem>

<para>

Print the current query buffer to the standard output.

<varlistentry>

<term><literal>\r</literal></term>

<term><literal>\r</literal> or <literal>\reset</literal></term>

<listitem>

<para>

Resets (clears) the query buffer.

<varlistentry>

<term><literal>\w</literal> <replaceable class="parameter">filename</replaceable></term>

<term><literal>\w</literal> <literal>|</><replaceable class="parameter">command</replaceable></term>

<term><literal>\w</literal>or <literal>\write</literal><replaceable class="parameter">filename</replaceable></term>

<term><literal>\w</literal>or <literal>\write</literal><literal>|</><replaceable class="parameter">command</replaceable></term>

<listitem>

<para>

Outputs the current query buffer to the file <replaceable

class="parameter">filename</replaceable> or pipes it to theUnix

class="parameter">filename</replaceable> or pipes it to theshell

command <replaceable class="parameter">command</replaceable>.

</para>

</listitem>

<term><literal>\! [ <replaceable class="parameter">command</replaceable> ]</literal></term>

<listitem>

<para>

Escapes to a separateUnixshell or executes theUnix command

Escapes to a separate shell or executes theshell command

<replaceable class="parameter">command</replaceable>. The

arguments are not further interpreted; the shell will see them

as-is. In particular, the variable substitution rules and