taken at the ends of transactions.
This is the default behavior.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>DELETE ROWS</literal></term>
<listitem>
<para>
All rows in the temporary table will be deleted at the end
of each transaction block. Essentially, an automatic <link
linkend="sql-truncate"><command>TRUNCATE</command></link> is done
at each commit.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>DROP</literal></term>
<listitem>
<para>
The temporary table will be dropped at the end of the current
transaction block.
</para>
</listitem>
</varlistentry>
</variablelist></para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>TABLESPACE <replaceable class="parameter">tablespace_name</replaceable></literal></term>
<listitem>
<para>
The <replaceable class="parameter">tablespace_name</replaceable> is the name
of the tablespace in which the new table is to be created.
If not specified,
<xref linkend="guc-default-tablespace"/> is consulted, or
<xref linkend="guc-temp-tablespaces"/> if the table is temporary.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>query</replaceable></term>
<listitem>
<para>
A <link linkend="sql-select"><command>SELECT</command></link>, <link
linkend="sql-table"><command>TABLE</command></link>, or <link linkend="sql-values"><command>VALUES</command></link>
command, or an <link linkend="sql-execute"><command>EXECUTE</command></link> command that runs a
prepared <command>SELECT</command>, <command>TABLE</command>, or
<command>VALUES</command> query.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>WITH [ NO ] DATA</literal></term>
<listitem>
<para>
This clause specifies whether or not the data produced by the query
should be copied into the new table. If not, only the table structure
is copied. The default is to copy the data.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Notes</title>
<para>
This command is functionally similar to <xref
linkend="sql-selectinto"/>, but it is
preferred since it is less likely to be confused with other uses of
the <command>SELECT INTO</command> syntax. Furthermore, <command>CREATE
TABLE AS</command> offers a superset of the functionality offered
by <command>SELECT INTO</command>.
</para>
</refsect1>