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<chapter id="extend">

<title>Extending <acronym>SQL</acronym></title>

</listitem>

<listitem>

<para>

Use <function>malloc()</> to allocate any memory that might be

Use <function>palloc()</> to allocate any memory that might be

freed by the backend C code (don't pass <function>new()</>-allocated

memory).

</para>

</listitem>

<listitem>

<para>

Use <function>free()</> to free memory allocated by the backend

Use <function>pfree()</> to free memory allocated by the backend

C code (do not use <function>delete()</> for such cases).

</para>

</listitem>