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Add support for converting binary values (i.e. bytea) into xml values,

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with new GUC parameter "xmlbinary" that controls the output encoding, as
per SQL/XML standard.
This commit is contained in:
Peter Eisentraut
2007-01-19 16:58:46 +00:00
parent 5b4a08896b
commit 4b48ad4fb2
7 changed files with 117 additions and 4 deletions
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26
src/backend/utils/adt/xml.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/utils/adt/xml.c,v 1.18 2007/01/18 13:59:11 petere Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/xml.c,v 1.19 2007/01/19 16:58:46 petere Exp $
*
*-------------------------------------------------------------------------
*/
@ -73,6 +73,8 @@ static xmlDocPtr xml_parse(text *data, bool is_document, bool preserve_whitespac
#endif /* USE_LIBXML */
XmlBinaryType xmlbinary;
#define NO_XML_SUPPORT() \
ereport(ERROR, \
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED), \
@ -1500,6 +1502,28 @@ map_sql_value_to_xml_value(Datum value, Oid type)
if (type == XMLOID)
return str;
#ifdef USE_LIBXML
if (type == BYTEAOID)
{
xmlBufferPtr buf;
xmlTextWriterPtr writer;
char *result;
buf = xmlBufferCreate();
writer = xmlNewTextWriterMemory(buf, 0);
if (xmlbinary == XMLBINARY_BASE64)
xmlTextWriterWriteBase64(writer, VARDATA(value), 0, VARSIZE(value) - VARHDRSZ);
else
xmlTextWriterWriteBinHex(writer, VARDATA(value), 0, VARSIZE(value) - VARHDRSZ);
xmlFreeTextWriter(writer);
result = pstrdup((const char *) xmlBufferContent(buf));
xmlBufferFree(buf);
return result;
}
#endif /* USE_LIBXML */
for (p = str; *p; p += pg_mblen(p))
{
switch (*p)