 than once per <code class="function">ereport</code> call; the successive
     strings thus supplied are concatenated with separating newlines.
    </p></li><li class="listitem"><p>
     <code class="function">errposition(int cursorpos)</code> specifies the textual location
     of an error within a query string.  Currently it is only useful for
     errors detected in the lexical and syntactic analysis phases of
     query processing.
    </p></li><li class="listitem"><p>
     <code class="function">errtab