diff options
Diffstat (limited to 'src/backend/utils/adt/xml.c')
| -rw-r--r-- | src/backend/utils/adt/xml.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/src/backend/utils/adt/xml.c b/src/backend/utils/adt/xml.c index 6587f4e4fc9..520668cf400 100644 --- a/src/backend/utils/adt/xml.c +++ b/src/backend/utils/adt/xml.c @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/backend/utils/adt/xml.c,v 1.99 2010/08/05 04:21:54 petere Exp $ + * $PostgreSQL: pgsql/src/backend/utils/adt/xml.c,v 1.100 2010/08/08 19:15:27 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -3541,3 +3541,27 @@ Datum xmlexists(PG_FUNCTION_ARGS) return 0; #endif } + +/* + * Determines if the node specified by the supplied XPath exists + * in a given XML document, returning a boolean. Differs from + * xmlexists as it supports namespaces and is not defined in SQL/XML. + */ +Datum +xpath_exists(PG_FUNCTION_ARGS) +{ +#ifdef USE_LIBXML + text *xpath_expr_text = PG_GETARG_TEXT_P(0); + xmltype *data = PG_GETARG_XML_P(1); + ArrayType *namespaces = PG_GETARG_ARRAYTYPE_P(2); + int res_nitems; + + xpath_internal(xpath_expr_text, data, namespaces, + &res_nitems, NULL); + + PG_RETURN_BOOL(res_nitems > 0); +#else + NO_XML_SUPPORT(); + return 0; +#endif +} |