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Fix cursor_to_xml in tableforest false mode 

It only produced <row> elements but no wrapping <table> element.

By contrast, cursor_to_xmlschema produced a schema that is now correct
but did not previously match the XML data produced by cursor_to_xml.

In passing, also fix a minor misunderstanding about moving cursors in
the tests related to this.

Reported-by: filip@jirsak.org
Based-on-patch-by: Thomas Munro <thomas.munro@enterprisedb.com>
This commit is contained in:
Peter Eisentraut 2017-05-03 21:25:01 -04:00
parent 4dd4104342
commit 0de791ed76
4 changed files with 71 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
src/backend/utils/adt/xml.c
View File

@ -149,6 +149,10 @@ static int xml_xpathobjtoxmlarray(xmlXPathObjectPtr xpathobj,
static xmlChar *pg_xmlCharStrndup(char *str, size_t len);
#endif /* USE_LIBXML */
static void xmldata_root_element_start(StringInfo result, const char *eltname,
const char *xmlschema, const char *targetns,
bool top_level);
static void xmldata_root_element_end(StringInfo result, const char *eltname);
static StringInfo query_to_xml_internal(const char *query, char *tablename,
const char *xmlschema, bool nulls, bool tableforest,
const char *targetns, bool top_level);
@ -2451,6 +2455,12 @@ cursor_to_xml(PG_FUNCTION_ARGS)
initStringInfo(&result);
if (!tableforest)
{
xmldata_root_element_start(&result, "table", NULL, targetns, true);
appendStringInfoChar(&result, '\n');
}
SPI_connect();
portal = SPI_cursor_find(name);
if (portal == NULL)
@ -2465,6 +2475,9 @@ cursor_to_xml(PG_FUNCTION_ARGS)
SPI_finish();
if (!tableforest)
xmldata_root_element_end(&result, "table");
PG_RETURN_XML_P(stringinfo_to_xmltype(&result));
}

64
src/test/regress/expected/xmlmap.out
View File

@ -696,20 +696,58 @@ SELECT cursor_to_xml('xc'::refcursor, 5, false, true, '');
(1 row)
MOVE FIRST IN xc;
SELECT cursor_to_xmlschema('xc'::refcursor, false, true, '');
cursor_to_xmlschema
----------------------------------------------------------------------------------------------
<xsd:schema +
xmlns:xsd="http://www.w3.org/2001/XMLSchema"> +
+
<xsd:simpleType name="INTEGER"> +
<xsd:restriction base="xsd:int"> +
<xsd:maxInclusive value="2147483647"/> +
<xsd:minInclusive value="-2147483648"/> +
</xsd:restriction> +
</xsd:simpleType> +
+
<xsd:simpleType name="UDT.regression.pg_catalog.text"> +
<xsd:restriction base="xsd:string"> +
</xsd:restriction> +
</xsd:simpleType> +
+
<xsd:complexType name="RowType"> +
<xsd:sequence> +
<xsd:element name="a" type="INTEGER" minOccurs="0"></xsd:element> +
<xsd:element name="b" type="UDT.regression.pg_catalog.text" minOccurs="0"></xsd:element>+
</xsd:sequence> +
</xsd:complexType> +
+
<xsd:element name="row" type="RowType"/> +
+
</xsd:schema>
(1 row)
MOVE BACKWARD ALL IN xc;
SELECT cursor_to_xml('xc'::refcursor, 5, true, false, '');
cursor_to_xml
---------------
<row> +
<a>1</a> +
<b>one</b> +
</row> +
+
<row> +
<a>2</a> +
<b>two</b> +
</row> +
+
cursor_to_xml
---------------------------------------------------------------
<table xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">+
+
<row> +
<a>-1</a> +
<b xsi:nil="true"/> +
</row> +
+
<row> +
<a>1</a> +
<b>one</b> +
</row> +
+
<row> +
<a>2</a> +
<b>two</b> +
</row> +
+
</table> +
(1 row)

6
src/test/regress/expected/xmlmap_1.out
View File

@ -78,7 +78,11 @@ SELECT cursor_to_xml('xc'::refcursor, 5, false, true, '');
ERROR: unsupported XML feature
DETAIL: This functionality requires the server to be built with libxml support.
HINT: You need to rebuild PostgreSQL using --with-libxml.
MOVE FIRST IN xc;
SELECT cursor_to_xmlschema('xc'::refcursor, false, true, '');
ERROR: unsupported XML feature
DETAIL: This functionality requires the server to be built with libxml support.
HINT: You need to rebuild PostgreSQL using --with-libxml.
MOVE BACKWARD ALL IN xc;
SELECT cursor_to_xml('xc'::refcursor, 5, true, false, '');
ERROR: unsupported XML feature
DETAIL: This functionality requires the server to be built with libxml support.

3
src/test/regress/sql/xmlmap.sql
View File

@ -30,7 +30,8 @@ SELECT query_to_xml_and_xmlschema('SELECT * FROM testxmlschema.test1', true, tru
DECLARE xc CURSOR WITH HOLD FOR SELECT * FROM testxmlschema.test1 ORDER BY 1, 2;
SELECT cursor_to_xml('xc'::refcursor, 5, false, true, '');
MOVE FIRST IN xc;
SELECT cursor_to_xmlschema('xc'::refcursor, false, true, '');
MOVE BACKWARD ALL IN xc;
SELECT cursor_to_xml('xc'::refcursor, 5, true, false, '');
SELECT cursor_to_xmlschema('xc'::refcursor, true, false, '');