From 293913568e6a7a86fd1479e1cff8e2ecb58d6568 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 13 Apr 2024 15:44:03 +0200 Subject: Adding upstream version 16.2. Signed-off-by: Daniel Baumann --- src/test/regress/sql/xml.sql | 662 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 662 insertions(+) create mode 100644 src/test/regress/sql/xml.sql (limited to 'src/test/regress/sql/xml.sql') diff --git a/src/test/regress/sql/xml.sql b/src/test/regress/sql/xml.sql new file mode 100644 index 0000000..a591eea --- /dev/null +++ b/src/test/regress/sql/xml.sql @@ -0,0 +1,662 @@ +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 '""'); -- cgit v1.2.3