CREATE TABLE xmltest ( id int, data xml ); INSERT INTO xmltest VALUES (1, 'one'); INSERT INTO xmltest VALUES (2, 'two'); INSERT INTO xmltest VALUES (3, 'one', 'xml'); SELECT pg_input_is_valid('oneone', 'xml'); SELECT message FROM pg_input_error_info('', 'xml'); SELECT xmlcomment('test'); SELECT xmlcomment('-test'); SELECT xmlcomment('test-'); SELECT xmlcomment('--test'); SELECT xmlcomment('te st'); SELECT xmlconcat(xmlcomment('hello'), xmlelement(NAME qux, 'foo'), xmlcomment('world')); SELECT xmlconcat('hello', 'you'); SELECT xmlconcat(1, 2); SELECT xmlconcat('bad', '', NULL, ''); SELECT xmlconcat('', NULL, ''); SELECT xmlconcat(NULL); SELECT xmlconcat(NULL, NULL); SELECT xmlelement(name element, xmlattributes (1 as one, 'deuce' as two), 'content'); SELECT xmlelement(name element, xmlattributes ('unnamed and wrong')); SELECT xmlelement(name element, xmlelement(name nested, 'stuff')); SELECT xmlelement(name employee, xmlforest(name, age, salary as pay)) FROM emp; SELECT xmlelement(name duplicate, xmlattributes(1 as a, 2 as b, 3 as a)); SELECT xmlelement(name num, 37); SELECT xmlelement(name foo, text 'bar'); SELECT xmlelement(name foo, xml 'bar'); SELECT xmlelement(name foo, text 'br'); SELECT xmlelement(name foo, xml 'br'); SELECT xmlelement(name foo, array[1, 2, 3]); SET xmlbinary TO base64; SELECT xmlelement(name foo, bytea 'bar'); SET xmlbinary TO hex; SELECT xmlelement(name foo, bytea 'bar'); SELECT xmlelement(name foo, xmlattributes(true as bar)); SELECT xmlelement(name foo, xmlattributes('2009-04-09 00:24:37'::timestamp as bar)); SELECT xmlelement(name foo, xmlattributes('infinity'::timestamp as bar)); SELECT xmlelement(name foo, xmlattributes('<>&"''' as funny, xml 'br' as funnier)); SELECT xmlparse(content ''); SELECT xmlparse(content ' '); SELECT xmlparse(content 'abc'); SELECT xmlparse(content 'x'); SELECT xmlparse(content '&'); SELECT xmlparse(content '&idontexist;'); SELECT xmlparse(content ''); SELECT xmlparse(content ''); SELECT xmlparse(content '&idontexist;'); SELECT xmlparse(content ''); SELECT xmlparse(document ' '); SELECT xmlparse(document 'abc'); SELECT xmlparse(document 'x'); SELECT xmlparse(document '&'); SELECT xmlparse(document '&idontexist;'); SELECT xmlparse(document ''); SELECT xmlparse(document ''); SELECT xmlparse(document '&idontexist;'); SELECT xmlparse(document ''); SELECT xmlpi(name foo); SELECT xmlpi(name xml); SELECT xmlpi(name xmlstuff); SELECT xmlpi(name foo, 'bar'); SELECT xmlpi(name foo, 'in?>valid'); SELECT xmlpi(name foo, null); SELECT xmlpi(name xml, null); SELECT xmlpi(name xmlstuff, null); SELECT xmlpi(name "xml-stylesheet", 'href="mystyle.css" type="text/css"'); SELECT xmlpi(name foo, ' bar'); SELECT xmlroot(xml '', version no value, standalone no value); SELECT xmlroot(xml '', version '2.0'); SELECT xmlroot(xml '', version no value, standalone yes); SELECT xmlroot(xml '', version no value, standalone yes); SELECT xmlroot(xmlroot(xml '', version '1.0'), version '1.1', standalone no); SELECT xmlroot('', version no value, standalone no); SELECT xmlroot('', version no value, standalone no value); SELECT xmlroot('', version no value); SELECT xmlroot ( xmlelement ( name gazonk, xmlattributes ( 'val' AS name, 1 + 1 AS num ), xmlelement ( NAME qux, 'foo' ) ), version '1.0', standalone yes ); SELECT xmlserialize(content data as character varying(20)) FROM xmltest; SELECT xmlserialize(content 'good' as char(10)); SELECT xmlserialize(document 'bad' as text); -- indent SELECT xmlserialize(DOCUMENT '42' AS text INDENT); SELECT xmlserialize(CONTENT '42' AS text INDENT); -- no indent SELECT xmlserialize(DOCUMENT '42' AS text NO INDENT); SELECT xmlserialize(CONTENT '42' AS text NO INDENT); -- indent non singly-rooted xml SELECT xmlserialize(DOCUMENT '7342' AS text INDENT); SELECT xmlserialize(CONTENT '7342' AS text INDENT); -- indent non singly-rooted xml with mixed contents SELECT xmlserialize(DOCUMENT 'text node73text node42' AS text INDENT); SELECT xmlserialize(CONTENT 'text node73text node42' AS text INDENT); -- indent singly-rooted xml with mixed contents SELECT xmlserialize(DOCUMENT '42text node73' AS text INDENT); SELECT xmlserialize(CONTENT '42text node73' AS text INDENT); -- indent empty string SELECT xmlserialize(DOCUMENT '' AS text INDENT); SELECT xmlserialize(CONTENT '' AS text INDENT); -- whitespaces SELECT xmlserialize(DOCUMENT ' ' AS text INDENT); SELECT xmlserialize(CONTENT ' ' AS text INDENT); -- indent null SELECT xmlserialize(DOCUMENT NULL AS text INDENT); SELECT xmlserialize(CONTENT NULL AS text INDENT); -- indent with XML declaration SELECT xmlserialize(DOCUMENT '73' AS text INDENT); SELECT xmlserialize(CONTENT '73' AS text INDENT); -- indent containing DOCTYPE declaration SELECT xmlserialize(DOCUMENT '' AS text INDENT); SELECT xmlserialize(CONTENT '' AS text INDENT); -- indent xml with empty element SELECT xmlserialize(DOCUMENT '' AS text INDENT); SELECT xmlserialize(CONTENT '' AS text INDENT); -- 'no indent' = not using 'no indent' SELECT xmlserialize(DOCUMENT '42' AS text) = xmlserialize(DOCUMENT '42' AS text NO INDENT); SELECT xmlserialize(CONTENT '42' AS text) = xmlserialize(CONTENT '42' AS text NO INDENT); SELECT xml 'bar' IS DOCUMENT; SELECT xml 'barfoo' IS DOCUMENT; SELECT xml '' IS NOT DOCUMENT; SELECT xml 'abc' IS NOT DOCUMENT; SELECT '<>' IS NOT DOCUMENT; SELECT xmlagg(data) FROM xmltest; SELECT xmlagg(data) FROM xmltest WHERE id > 10; SELECT xmlelement(name employees, xmlagg(xmlelement(name name, name))) FROM emp; -- Check mapping SQL identifier to XML name SELECT xmlpi(name ":::_xml_abc135.%-&_"); SELECT xmlpi(name "123"); PREPARE foo (xml) AS SELECT xmlconcat('', $1); SET XML OPTION DOCUMENT; EXECUTE foo (''); EXECUTE foo ('bad'); SELECT xml ''; SET XML OPTION CONTENT; EXECUTE foo (''); EXECUTE foo ('good'); SELECT xml ' '; SELECT xml ' '; SELECT xml ''; SELECT xml ' oops '; SELECT xml ' '; SELECT xml ''; -- Test backwards parsing CREATE VIEW xmlview1 AS SELECT xmlcomment('test'); CREATE VIEW xmlview2 AS SELECT xmlconcat('hello', 'you'); CREATE VIEW xmlview3 AS SELECT xmlelement(name element, xmlattributes (1 as ":one:", 'deuce' as two), 'content&'); CREATE VIEW xmlview4 AS SELECT xmlelement(name employee, xmlforest(name, age, salary as pay)) FROM emp; CREATE VIEW xmlview5 AS SELECT xmlparse(content 'x'); CREATE VIEW xmlview6 AS SELECT xmlpi(name foo, 'bar'); CREATE VIEW xmlview7 AS SELECT xmlroot(xml '', version no value, standalone yes); CREATE VIEW xmlview8 AS SELECT xmlserialize(content 'good' as char(10)); CREATE VIEW xmlview9 AS SELECT xmlserialize(content 'good' as text); SELECT table_name, view_definition FROM information_schema.views WHERE table_name LIKE 'xmlview%' ORDER BY 1; -- Text XPath expressions evaluation SELECT xpath('/value', data) FROM xmltest; SELECT xpath(NULL, NULL) IS NULL FROM xmltest; SELECT xpath('', ''); SELECT xpath('//text()', 'number one'); SELECT xpath('//loc:piece/@id', 'number one', ARRAY[ARRAY['loc', 'http://127.0.0.1']]); SELECT xpath('//loc:piece', 'number one', ARRAY[ARRAY['loc', 'http://127.0.0.1']]); SELECT xpath('//loc:piece', 'number one', ARRAY[ARRAY['loc', 'http://127.0.0.1']]); SELECT xpath('//b', 'one two three etc'); SELECT xpath('//text()', '<'); SELECT xpath('//@value', ''); SELECT xpath('''<>''', ''); SELECT xpath('count(//*)', ''); SELECT xpath('count(//*)=0', ''); SELECT xpath('count(//*)=3', ''); SELECT xpath('name(/*)', ''); SELECT xpath('/nosuchtag', ''); SELECT xpath('root', ''); -- Round-trip non-ASCII data through xpath(). DO $$ DECLARE xml_declaration text := ''; degree_symbol text; res xml[]; BEGIN -- Per the documentation, except when the server encoding is UTF8, xpath() -- may not work on non-ASCII data. The untranslatable_character and -- undefined_function traps below, currently dead code, will become relevant -- if we remove this limitation. IF current_setting('server_encoding') <> 'UTF8' THEN RAISE LOG 'skip: encoding % unsupported for xpath', current_setting('server_encoding'); RETURN; END IF; degree_symbol := convert_from('\xc2b0', 'UTF8'); res := xpath('text()', (xml_declaration || '' || degree_symbol || '')::xml); IF degree_symbol <> res[1]::text THEN RAISE 'expected % (%), got % (%)', degree_symbol, convert_to(degree_symbol, 'UTF8'), res[1], convert_to(res[1]::text, 'UTF8'); END IF; EXCEPTION -- character with byte sequence 0xc2 0xb0 in encoding "UTF8" has no equivalent in encoding "LATIN8" WHEN untranslatable_character -- default conversion function for encoding "UTF8" to "MULE_INTERNAL" does not exist OR undefined_function -- unsupported XML feature OR feature_not_supported THEN RAISE LOG 'skip: %', SQLERRM; END $$; -- Test xmlexists and xpath_exists SELECT xmlexists('//town[text() = ''Toronto'']' PASSING BY REF 'Bidford-on-AvonCwmbranBristol'); SELECT xmlexists('//town[text() = ''Cwmbran'']' PASSING BY REF 'Bidford-on-AvonCwmbranBristol'); SELECT xmlexists('count(/nosuchtag)' PASSING BY REF ''); SELECT xpath_exists('//town[text() = ''Toronto'']','Bidford-on-AvonCwmbranBristol'::xml); SELECT xpath_exists('//town[text() = ''Cwmbran'']','Bidford-on-AvonCwmbranBristol'::xml); SELECT xpath_exists('count(/nosuchtag)', ''::xml); INSERT INTO xmltest VALUES (4, 'BudvarfreeCarlinglots'::xml); INSERT INTO xmltest VALUES (5, 'MolsonfreeCarlinglots'::xml); INSERT INTO xmltest VALUES (6, 'BudvarfreeCarlinglots'::xml); INSERT INTO xmltest VALUES (7, 'MolsonfreeCarlinglots'::xml); SELECT COUNT(id) FROM xmltest WHERE xmlexists('/menu/beer' PASSING data); SELECT COUNT(id) FROM xmltest WHERE xmlexists('/menu/beer' PASSING BY REF data BY REF); SELECT COUNT(id) FROM xmltest WHERE xmlexists('/menu/beers' PASSING BY REF data); SELECT COUNT(id) FROM xmltest WHERE xmlexists('/menu/beers/name[text() = ''Molson'']' PASSING BY REF data); SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/menu/beer',data); SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/menu/beers',data); SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/menu/beers/name[text() = ''Molson'']',data); SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/myns:menu/myns:beer',data,ARRAY[ARRAY['myns','http://myns.com']]); SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/myns:menu/myns:beers',data,ARRAY[ARRAY['myns','http://myns.com']]); SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/myns:menu/myns:beers/myns:name[text() = ''Molson'']',data,ARRAY[ARRAY['myns','http://myns.com']]); CREATE TABLE query ( expr TEXT ); INSERT INTO query VALUES ('/menu/beers/cost[text() = ''lots'']'); SELECT COUNT(id) FROM xmltest, query WHERE xmlexists(expr PASSING BY REF data); -- Test xml_is_well_formed and variants SELECT xml_is_well_formed_document('bar'); SELECT xml_is_well_formed_document('abc'); SELECT xml_is_well_formed_content('bar'); SELECT xml_is_well_formed_content('abc'); SET xmloption TO DOCUMENT; SELECT xml_is_well_formed('abc'); SELECT xml_is_well_formed('<>'); SELECT xml_is_well_formed(''); SELECT xml_is_well_formed('bar'); SELECT xml_is_well_formed('barbaz'); SELECT xml_is_well_formed('number one'); SELECT xml_is_well_formed('bar'); SELECT xml_is_well_formed('bar'); SELECT xml_is_well_formed('&'); SELECT xml_is_well_formed('&idontexist;'); SELECT xml_is_well_formed(''); SELECT xml_is_well_formed(''); SELECT xml_is_well_formed('&idontexist;'); SET xmloption TO CONTENT; SELECT xml_is_well_formed('abc'); -- Since xpath() deals with namespaces, it's a bit stricter about -- what's well-formed and what's not. If we don't obey these rules -- (i.e. ignore namespace-related errors from libxml), xpath() -- fails in subtle ways. The following would for example produce -- the xml value -- -- which is invalid because '<' may not appear un-escaped in -- attribute values. -- Since different libxml versions emit slightly different -- error messages, we suppress the DETAIL in this test. \set VERBOSITY terse SELECT xpath('/*', ''); \set VERBOSITY default -- Again, the XML isn't well-formed for namespace purposes SELECT xpath('/*', ''); -- XPath deprecates relative namespaces, but they're not supposed to -- throw an error, only a warning. SELECT xpath('/*', ''); -- External entity references should not leak filesystem information. SELECT XMLPARSE(DOCUMENT ']>&c;'); SELECT XMLPARSE(DOCUMENT ']>&c;'); -- This might or might not load the requested DTD, but it mustn't throw error. SELECT XMLPARSE(DOCUMENT ' '); -- XMLPATH tests CREATE TABLE xmldata(data xml); INSERT INTO xmldata VALUES(' AU Australia 3 CN China 3 HK HongKong 3 IN India 3 JP Japan 3Sinzo Abe SG Singapore 3791 '); -- XMLTABLE with columns SELECT xmltable.* FROM (SELECT data FROM xmldata) x, LATERAL XMLTABLE('/ROWS/ROW' PASSING data COLUMNS id int PATH '@id', _id FOR ORDINALITY, country_name text PATH 'COUNTRY_NAME/text()' NOT NULL, country_id text PATH 'COUNTRY_ID', region_id int PATH 'REGION_ID', size float PATH 'SIZE', unit text PATH 'SIZE/@unit', premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified'); CREATE VIEW xmltableview1 AS SELECT xmltable.* FROM (SELECT data FROM xmldata) x, LATERAL XMLTABLE('/ROWS/ROW' PASSING data COLUMNS id int PATH '@id', _id FOR ORDINALITY, country_name text PATH 'COUNTRY_NAME/text()' NOT NULL, country_id text PATH 'COUNTRY_ID', region_id int PATH 'REGION_ID', size float PATH 'SIZE', unit text PATH 'SIZE/@unit', premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified'); SELECT * FROM xmltableview1; \sv xmltableview1 EXPLAIN (COSTS OFF) SELECT * FROM xmltableview1; EXPLAIN (COSTS OFF, VERBOSE) SELECT * FROM xmltableview1; -- errors SELECT * FROM XMLTABLE (ROW () PASSING null COLUMNS v1 timestamp) AS f (v1, v2); -- XMLNAMESPACES tests SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS zz), '/zz:rows/zz:row' PASSING '10' COLUMNS a int PATH 'zz:a'); CREATE VIEW xmltableview2 AS SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS zz), '/zz:rows/zz:row' PASSING '10' COLUMNS a int PATH 'zz:a'); SELECT * FROM xmltableview2; SELECT * FROM XMLTABLE(XMLNAMESPACES(DEFAULT 'http://x.y'), '/rows/row' PASSING '10' COLUMNS a int PATH 'a'); SELECT * FROM XMLTABLE('.' PASSING '' COLUMNS a text PATH 'foo/namespace::node()'); -- used in prepare statements PREPARE pp AS SELECT xmltable.* FROM (SELECT data FROM xmldata) x, LATERAL XMLTABLE('/ROWS/ROW' PASSING data COLUMNS id int PATH '@id', _id FOR ORDINALITY, country_name text PATH 'COUNTRY_NAME' NOT NULL, country_id text PATH 'COUNTRY_ID', region_id int PATH 'REGION_ID', size float PATH 'SIZE', unit text PATH 'SIZE/@unit', premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified'); EXECUTE pp; SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int); SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id FOR ORDINALITY, "COUNTRY_NAME" text, "REGION_ID" int); SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int); SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id'); SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id FOR ORDINALITY); SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int, rawdata xml PATH '.'); SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int, rawdata xml PATH './*'); SELECT * FROM xmltable('/root' passing 'a1aa2a bbbbxxxcccc' COLUMNS element text); SELECT * FROM xmltable('/root' passing 'a1aa2a bbbbxxxcccc' COLUMNS element text PATH 'element/text()'); -- should fail -- CDATA test select * from xmltable('d/r' passing ' &"<>!foo]]>2' columns c text); -- XML builtin entities SELECT * FROM xmltable('/x/a' PASSING ''"&<>' COLUMNS ent text); SELECT * FROM xmltable('/x/a' PASSING ''"&<>' COLUMNS ent xml); EXPLAIN (VERBOSE, COSTS OFF) SELECT xmltable.* FROM (SELECT data FROM xmldata) x, LATERAL XMLTABLE('/ROWS/ROW' PASSING data COLUMNS id int PATH '@id', _id FOR ORDINALITY, country_name text PATH 'COUNTRY_NAME' NOT NULL, country_id text PATH 'COUNTRY_ID', region_id int PATH 'REGION_ID', size float PATH 'SIZE', unit text PATH 'SIZE/@unit', premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified'); -- test qual SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) WHERE "COUNTRY_NAME" = 'Japan'; EXPLAIN (VERBOSE, COSTS OFF) SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) WHERE "COUNTRY_NAME" = 'Japan'; -- should to work with more data INSERT INTO xmldata VALUES(' CZ Czech Republic 2Milos Zeman DE Germany 2 FR France 2 '); INSERT INTO xmldata VALUES(' EG Egypt 1 SD Sudan 1 '); SELECT xmltable.* FROM (SELECT data FROM xmldata) x, LATERAL XMLTABLE('/ROWS/ROW' PASSING data COLUMNS id int PATH '@id', _id FOR ORDINALITY, country_name text PATH 'COUNTRY_NAME' NOT NULL, country_id text PATH 'COUNTRY_ID', region_id int PATH 'REGION_ID', size float PATH 'SIZE', unit text PATH 'SIZE/@unit', premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified'); SELECT xmltable.* FROM (SELECT data FROM xmldata) x, LATERAL XMLTABLE('/ROWS/ROW' PASSING data COLUMNS id int PATH '@id', _id FOR ORDINALITY, country_name text PATH 'COUNTRY_NAME' NOT NULL, country_id text PATH 'COUNTRY_ID', region_id int PATH 'REGION_ID', size float PATH 'SIZE', unit text PATH 'SIZE/@unit', premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified') WHERE region_id = 2; EXPLAIN (VERBOSE, COSTS OFF) SELECT xmltable.* FROM (SELECT data FROM xmldata) x, LATERAL XMLTABLE('/ROWS/ROW' PASSING data COLUMNS id int PATH '@id', _id FOR ORDINALITY, country_name text PATH 'COUNTRY_NAME' NOT NULL, country_id text PATH 'COUNTRY_ID', region_id int PATH 'REGION_ID', size float PATH 'SIZE', unit text PATH 'SIZE/@unit', premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified') WHERE region_id = 2; -- should fail, NULL value SELECT xmltable.* FROM (SELECT data FROM xmldata) x, LATERAL XMLTABLE('/ROWS/ROW' PASSING data COLUMNS id int PATH '@id', _id FOR ORDINALITY, country_name text PATH 'COUNTRY_NAME' NOT NULL, country_id text PATH 'COUNTRY_ID', region_id int PATH 'REGION_ID', size float PATH 'SIZE' NOT NULL, unit text PATH 'SIZE/@unit', premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified'); -- if all is ok, then result is empty -- one line xml test WITH x AS (SELECT proname, proowner, procost::numeric, pronargs, array_to_string(proargnames,',') as proargnames, case when proargtypes <> '' then array_to_string(proargtypes::oid[],',') end as proargtypes FROM pg_proc WHERE proname = 'f_leak'), y AS (SELECT xmlelement(name proc, xmlforest(proname, proowner, procost, pronargs, proargnames, proargtypes)) as proc FROM x), z AS (SELECT xmltable.* FROM y, LATERAL xmltable('/proc' PASSING proc COLUMNS proname name, proowner oid, procost float, pronargs int, proargnames text, proargtypes text)) SELECT * FROM z EXCEPT SELECT * FROM x; -- multi line xml test, result should be empty too WITH x AS (SELECT proname, proowner, procost::numeric, pronargs, array_to_string(proargnames,',') as proargnames, case when proargtypes <> '' then array_to_string(proargtypes::oid[],',') end as proargtypes FROM pg_proc), y AS (SELECT xmlelement(name data, xmlagg(xmlelement(name proc, xmlforest(proname, proowner, procost, pronargs, proargnames, proargtypes)))) as doc FROM x), z AS (SELECT xmltable.* FROM y, LATERAL xmltable('/data/proc' PASSING doc COLUMNS proname name, proowner oid, procost float, pronargs int, proargnames text, proargtypes text)) SELECT * FROM z EXCEPT SELECT * FROM x; CREATE TABLE xmltest2(x xml, _path text); INSERT INTO xmltest2 VALUES('1', 'A'); INSERT INTO xmltest2 VALUES('2', 'B'); INSERT INTO xmltest2 VALUES('3', 'C'); INSERT INTO xmltest2 VALUES('2', 'D'); SELECT xmltable.* FROM xmltest2, LATERAL xmltable('/d/r' PASSING x COLUMNS a int PATH '' || lower(_path) || 'c'); SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH '.'); SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH 'x' DEFAULT ascii(_path) - 54); -- XPath result can be boolean or number too SELECT * FROM XMLTABLE('*' PASSING 'a' COLUMNS a xml PATH '.', b text PATH '.', c text PATH '"hi"', d boolean PATH '. = "a"', e integer PATH 'string-length(.)'); \x SELECT * FROM XMLTABLE('*' PASSING 'pre&deeppost' COLUMNS x xml PATH '/e/n2', y xml PATH '/'); \x SELECT * FROM XMLTABLE('.' PASSING XMLELEMENT(NAME a) columns a varchar(20) PATH '""', b xml PATH '""');