On 09.02.23 08:23, Tom Lane wrote:
> Um ... why are you using PG_TRY here at all? It seems like
> you have full control of the actually likely error cases.
> The only plausible error out of the StringInfo calls is OOM,
> and you probably don't want to trap that at all.
My intention was to catch any unexpected error from
xmlDocDumpFormatMemory and handle it properly. But I guess you're right,
I can control the likely error cases by checking doc and nbytes.
You suggest something along these lines?
xmlDocPtr doc;
xmlChar *xmlbuf = NULL;
text *arg = PG_GETARG_TEXT_PP(0);
StringInfoData buf;
int nbytes;
doc = xml_parse(arg, XMLOPTION_DOCUMENT, false,
GetDatabaseEncoding(), NULL);
if(!doc)
elog(ERROR, "could not parse the given XML document");
xmlDocDumpFormatMemory(doc, &xmlbuf, &nbytes, 1);
xmlFreeDoc(doc);
if(!nbytes)
elog(ERROR, "could not indent the given XML document");
initStringInfo(&buf);
appendStringInfoString(&buf, (const char *)xmlbuf);
xmlFree(xmlbuf);
PG_RETURN_XML_P(stringinfo_to_xmltype(&buf));
Thanks!
Best, Jim
