CREATE TABLE xmltest (
id int,
data xml
);
INSERT INTO xmltest VALUES (1, '<value>one</value>');
INSERT INTO xmltest VALUES (2, '<value>two</value>');
INSERT INTO xmltest VALUES (3, '<wrong');
ERROR: invalid XML content
LINE 1: INSERT INTO xmltest VALUES (3, '<wrong');
^
DETAIL: line 1: Couldn't find end of Start Tag wrong line 1
<wrong
^
SELECT * FROM xmltest;
id | data
----+-------------------- 1 | <value>one</value> 2 | <value>two</value>
(2 rows)
-- test non-throwing API, too
SELECT pg_input_is_valid('<value>one</value>', 'xml');
pg_input_is_valid
-------------------
t
(1 row)
SELECT pg_input_is_valid('<value>one</', 'xml');
pg_input_is_valid
-------------------
f
(1 row)
SELECT message FROM pg_input_error_info('<value>one</', 'xml');
message
---------------------
invalid XML content
(1 row)
SELECT pg_input_is_valid('<?xml version="1.0" standalone="y"?><foo/>', 'xml');
pg_input_is_valid
-------------------
f
(1 row)
SELECT message FROM pg_input_error_info('<?xml version="1.0" standalone="y"?><foo/>', 'xml');
message
----------------------------------------------
invalid XML content: invalid XML declaration
(1 row)
SELECT xmlconcat(1, 2);
ERROR: argument of XMLCONCAT must be type xml, not type integer
LINE 1: SELECT xmlconcat(1, 2);
^
SELECT xmlconcat('bad', '<syntax');
ERROR: invalid XML content
LINE 1: SELECT xmlconcat('bad', '<syntax');
^
DETAIL: line 1: Couldn't find end of Start Tag syntax line 1
<syntax
^
SELECT xmlconcat('<foo/>', NULL, '<?xml version="1.1" standalone="no"?><bar/>');
xmlconcat
--------------
<foo/><bar/>
(1 row)
SELECT xmlelement(name element,
xmlattributes (1 as one, 'deuce' as two),
'content');
xmlelement
------------------------------------------------
<element one="1" two="deuce">content</element>
(1 row)
SELECT xmlelement(name element,
xmlattributes ('unnamed and wrong'));
ERROR: unnamed XML attribute value must be a column reference
LINE 2: xmlattributes ('unnamed and wrong'));
^
SELECT xmlelement(name element, xmlelement(name nested, 'stuff'));
xmlelement
-------------------------------------------
<element><nested>stuff</nested></element>
(1 row)
SELECT xmlelement(name employee, xmlforest(name, age, salary as pay)) FROM emp;
xmlelement
----------------------------------------------------------------------
<employee><name>sharon</name><age>25</age><pay>1000</pay></employee>
<employee><name>sam</name><age>30</age><pay>2000</pay></employee>
<employee><name>bill</name><age>20</age><pay>1000</pay></employee>
<employee><name>jeff</name><age>23</age><pay>600</pay></employee>
<employee><name>cim</name><age>30</age><pay>400</pay></employee>
<employee><name>linda</name><age>19</age><pay>100</pay></employee>
(6 rows)
SELECT xmlelement(name duplicate, xmlattributes(1 as a, 2 as b, 3 as a));
ERROR: XML attribute name "a" appears more than once
LINE 1: ...ment(name duplicate, xmlattributes(1 as a, 2 as b, 3 as a));
^
SELECT xmlelement(name num, 37);
xmlelement
---------------
<num>37</num>
(1 row)
SELECT xmlelement(name foo, text 'bar');
xmlelement
----------------
<foo>bar</foo>
(1 row)
SELECT xmlelement(name foo, xml 'bar');
xmlelement
----------------
<foo>bar</foo>
(1 row)
SELECT xmlelement(name foo, text 'b<a/>r');
xmlelement
-------------------------
<foo>b<a/>r</foo>
(1 row)
SELECT xmlelement(name foo, xml 'b<a/>r');
xmlelement
-------------------
<foo>b<a/>r</foo>
(1 row)
SELECT xmlelement(name foo, xmlattributes('infinity'::timestamp as bar));
ERROR: timestamp out of range
DETAIL: XML does not support infinite timestamp values.
SELECT xmlelement(name foo, xmlattributes('<>&"''' as funny, xml 'b<a/>r' as funnier));
xmlelement
------------------------------------------------------------
<foo funny="<>&"'" funnier="b<a/>r"/>
(1 row)
SELECT xmlparse(content '<twoerrors>&idontexist;</unbalanced>');
ERROR: invalid XML content
DETAIL: line 1: Entity 'idontexist' not defined
<twoerrors>&idontexist;</unbalanced>
^
line 1: Opening and ending tag mismatch: twoerrors line 1 and unbalanced
<twoerrors>&idontexist;</unbalanced>
^
SELECT xmlparse(content '<nosuchprefix:tag/>');
xmlparse
---------------------
<nosuchprefix:tag/>
(1 row)
SELECT xmlparse(document ' ');
ERROR: invalid XML document
DETAIL: line 1: Start tag expected, '<' not found
^
SELECT xmlparse(document 'abc');
ERROR: invalid XML document
DETAIL: line 1: Start tag expected, '<' not found
abc
^
SELECT xmlparse(document '<abc>x</abc>');
xmlparse
--------------
<abc>x</abc>
(1 row)
SELECT xmlparse(document '<invalidentity>&</abc>');
ERROR: invalid XML document
DETAIL: line 1: xmlParseEntityRef: no name
<invalidentity>&</abc>
^
line 1: Opening and ending tag mismatch: invalidentity line 1 and abc
<invalidentity>&</abc>
^
SELECT xmlparse(document '<undefinedentity>&idontexist;</abc>');
ERROR: invalid XML document
DETAIL: line 1: Entity 'idontexist' not defined
<undefinedentity>&idontexist;</abc>
^
line 1: Opening and ending tag mismatch: undefinedentity line 1 and abc
<undefinedentity>&idontexist;</abc>
^
SELECT xmlparse(document '<invalidns xmlns=''<''/>');
xmlparse
---------------------------
<invalidns xmlns='<'/>
(1 row)
SELECT xmlparse(document '<twoerrors>&idontexist;</unbalanced>');
ERROR: invalid XML document
DETAIL: line 1: Entity 'idontexist' not defined
<twoerrors>&idontexist;</unbalanced>
^
line 1: Opening and ending tag mismatch: twoerrors line 1 and unbalanced
<twoerrors>&idontexist;</unbalanced>
^
SELECT xmlparse(document '<nosuchprefix:tag/>');
xmlparse
---------------------
<nosuchprefix:tag/>
(1 row)
SELECT xmlroot(xml '<foo/>', version no value, standalone yes);
xmlroot
----------------------------------------------
<?xml version="1.0" standalone="yes"?><foo/>
(1 row)
SELECT xmlroot(xml '<?xml version="1.1"?><foo/>', version no value, standalone yes);
xmlroot
----------------------------------------------
<?xml version="1.0" standalone="yes"?><foo/>
(1 row)
SELECT xmlroot(xmlroot(xml '<foo/>', version '1.0'), version '1.1', standalone no);
xmlroot
---------------------------------------------
<?xml version="1.1" standalone="no"?><foo/>
(1 row)
SELECT xmlroot('<?xml version="1.1" standalone="yes"?><foo/>', version no value, standalone no);
xmlroot
---------------------------------------------
<?xml version="1.0" standalone="no"?><foo/>
(1 row)
SELECT xmlroot('<?xml version="1.1" standalone="yes"?><foo/>', version no value, standalone no value);
xmlroot
---------
<foo/>
(1 row)
SELECT xmlroot('<?xml version="1.1" standalone="yes"?><foo/>', version no value);
xmlroot
----------------------------------------------
<?xml version="1.0" standalone="yes"?><foo/>
(1 row)
SELECT xmlroot (
xmlelement (
name gazonk,
xmlattributes (
'val' AS name, 1 + 1 AS num
),
xmlelement (
NAME qux,
'foo'
)
),
version '1.0',
standalone yes
);
xmlroot
------------------------------------------------------------------------------------------
<?xml version="1.0" standalone="yes"?><gazonk name="val" num="2"><qux>foo</qux></gazonk>
(1 row)
SELECT xmlserialize(content data as character varying(20)) FROM xmltest;
xmlserialize
--------------------
<value>one</value>
<value>two</value>
(2 rows)
SELECT xmlserialize(content 'good' as char(10));
xmlserialize
--------------
good
(1 row)
SELECT xmlserialize(document 'bad' as text);
ERROR: not an XML document
-- indent
SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val></bar></foo>' AS text INDENT);
xmlserialize
-------------------------
<foo> +
<bar> +
<val x="y">42</val>+
</bar> +
</foo>
(1 row)
SELECT xmlserialize(CONTENT '<foo><bar><val x="y">42</val></bar></foo>' AS text INDENT);
xmlserialize
-------------------------
<foo> +
<bar> +
<val x="y">42</val>+
</bar> +
</foo>
(1 row)
-- no indent
SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val></bar></foo>' AS text NO INDENT);
xmlserialize
-------------------------------------------
<foo><bar><val x="y">42</val></bar></foo>
(1 row)
SELECT xmlserialize(CONTENT '<foo><bar><val x="y">42</val></bar></foo>' AS text NO INDENT);
xmlserialize
-------------------------------------------
<foo><bar><val x="y">42</val></bar></foo>
(1 row)
-- indent non singly-rooted xml
SELECT xmlserialize(DOCUMENT '<foo>73</foo><bar><val x="y">42</val></bar>' AS text INDENT);
ERROR: not an XML document
SELECT xmlserialize(CONTENT '<foo>73</foo><bar><val x="y">42</val></bar>' AS text INDENT);
xmlserialize
-----------------------
<foo>73</foo> +
<bar> +
<val x="y">42</val>+
</bar>
(1 row)
-- indent non singly-rooted xml with mixed contents
SELECT xmlserialize(DOCUMENT 'text node<foo>73</foo>text node<bar><val x="y">42</val></bar>' AS text INDENT);
ERROR: not an XML document
SELECT xmlserialize(CONTENT 'text node<foo>73</foo>text node<bar><val x="y">42</val></bar>' AS text INDENT);
xmlserialize
------------------------
text node +
<foo>73</foo>text node+
<bar> +
<val x="y">42</val> +
</bar>
(1 row)
-- indent singly-rooted xml with mixed contents
SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val><val x="y">text node<val>73</val></val></bar></foo>' AS text INDENT);
xmlserialize
---------------------------------------------
<foo> +
<bar> +
<val x="y">42</val> +
<val x="y">text node<val>73</val></val>+
</bar> +
</foo>
(1 row)
-- indent empty string
SELECT xmlserialize(DOCUMENT '' AS text INDENT);
ERROR: not an XML document
SELECT xmlserialize(CONTENT '' AS text INDENT);
xmlserialize
--------------
(1 row)
-- whitespaces
SELECT xmlserialize(DOCUMENT ' ' AS text INDENT);
ERROR: not an XML document
SELECT xmlserialize(CONTENT ' ' AS text INDENT);
xmlserialize
--------------
(1 row)
-- indent null
SELECT xmlserialize(DOCUMENT NULL AS text INDENT);
xmlserialize
--------------
(1 row)
SELECT xmlserialize(CONTENT NULL AS text INDENT);
xmlserialize
--------------
(1 row)
-- indent with XML declaration
SELECT xmlserialize(DOCUMENT '<?xml version="1.0" encoding="UTF-8"?><foo><bar><val>73</val></bar></foo>' AS text INDENT);
xmlserialize
----------------------------------------
<?xml version="1.0" encoding="UTF-8"?>+
<foo> +
<bar> +
<val>73</val> +
</bar> +
</foo>
(1 row)
SELECT xmlserialize(CONTENT '<?xml version="1.0" encoding="UTF-8"?><foo><bar><val>73</val></bar></foo>' AS text INDENT);
xmlserialize
-------------------
<foo> +
<bar> +
<val>73</val>+
</bar> +
</foo>
(1 row)
-- indent containing DOCTYPE declaration
SELECT xmlserialize(DOCUMENT '<!DOCTYPE a><a/>' AS text INDENT);
xmlserialize
--------------
<!DOCTYPE a>+
<a/>
(1 row)
SELECT xmlserialize(CONTENT '<!DOCTYPE a><a/>' AS text INDENT);
xmlserialize
--------------
<!DOCTYPE a>+
<a/> +
(1 row)
-- indent xml with empty element
SELECT xmlserialize(DOCUMENT '<foo><bar></bar></foo>' AS text INDENT);
xmlserialize
--------------
<foo> +
<bar/> +
</foo>
(1 row)
SELECT xmlserialize(CONTENT '<foo><bar></bar></foo>' AS text INDENT);
xmlserialize
--------------
<foo> +
<bar/> +
</foo>
(1 row)
-- 'no indent' = not using 'no indent'
SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val></bar></foo>' AS text) = xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val></bar></foo>' AS text NO INDENT);
?column?
----------
t
(1 row)
SELECT xmlserialize(CONTENT '<foo><bar><val x="y">42</val></bar></foo>' AS text) = xmlserialize(CONTENT '<foo><bar><val x="y">42</val></bar></foo>' AS text NO INDENT);
?column?
----------
t
(1 row)
-- indent xml strings containing blank nodes
SELECT xmlserialize(DOCUMENT '<foo> <bar></bar> </foo>' AS text INDENT);
xmlserialize
--------------
<foo> +
<bar/> +
</foo>
(1 row)
SELECT xmlserialize(CONTENT 'text node<foo> <bar></bar> </foo>' AS text INDENT);
xmlserialize
--------------
text node +
<foo> +
<bar/> +
</foo>
(1 row)
SELECT xml '<foo>bar</foo>' IS DOCUMENT;
?column?
----------
t
(1 row)
SELECT xml '<foo>bar</foo><bar>foo</bar>' IS DOCUMENT;
?column?
----------
f
(1 row)
SELECT xml '<abc/>' IS NOT DOCUMENT;
?column?
----------
f
(1 row)
SELECT xml 'abc' IS NOT DOCUMENT;
?column?
----------
t
(1 row)
SELECT '<>' IS NOT DOCUMENT;
ERROR: invalid XML content
LINE 1: SELECT '<>' IS NOT DOCUMENT;
^
DETAIL: line 1: StartTag: invalid element name
<>
^
SELECT xmlagg(data) FROM xmltest;
xmlagg
--------------------------------------
<value>one</value><value>two</value>
(1 row)
SELECT xmlagg(data) FROM xmltest WHERE id > 10;
xmlagg
--------
PREPARE foo (xml) AS SELECT xmlconcat('<foo/>', $1);
SET XML OPTION DOCUMENT;
EXECUTE foo ('<bar/>');
xmlconcat
--------------
<foo/><bar/>
(1 row)
EXECUTE foo ('bad');
ERROR: invalid XML document
LINE 1: EXECUTE foo ('bad');
^
DETAIL: line 1: Start tag expected, '<' not found
bad
^
SELECT xml '<!DOCTYPE a><a/><b/>';
ERROR: invalid XML document
LINE 1: SELECT xml '<!DOCTYPE a><a/><b/>';
^
DETAIL: line 1: Extra content at the end of the document
<!DOCTYPE a><a/><b/>
^
SET XML OPTION CONTENT;
EXECUTE foo ('<bar/>');
xmlconcat
--------------
<foo/><bar/>
(1 row)
SELECT xml '<!-- in SQL:2006+ a doc is content too--> <?y z?> <!DOCTYPE a><a/>';
xml
--------------------------------------------------------------------
<!-- in SQL:2006+ a doc is content too--> <?y z?> <!DOCTYPE a><a/>
(1 row)
SELECT xml '<?xml version="1.0"?> <!-- hi--> <!DOCTYPE a><a/>';
xml
------------------------------
<!-- hi--> <!DOCTYPE a><a/>
(1 row)
SELECT xml '<!DOCTYPE a><a/>';
xml
------------------
<!DOCTYPE a><a/>
(1 row)
SELECT xml '<!-- hi--> oops <!DOCTYPE a><a/>';
ERROR: invalid XML content
LINE 1: SELECT xml '<!-- hi--> oops <!DOCTYPE a><a/>';
^
DETAIL: line 1: StartTag: invalid element name
<!-- hi--> oops <!DOCTYPE a><a/>
^
SELECT xml '<!-- hi--> <oops/> <!DOCTYPE a><a/>';
ERROR: invalid XML content
LINE 1: SELECT xml '<!-- hi--> <oops/> <!DOCTYPE a><a/>';
^
DETAIL: line 1: StartTag: invalid element name
<!-- hi--> <oops/> <!DOCTYPE a><a/>
^
SELECT xml '<!DOCTYPE a><a/><b/>';
ERROR: invalid XML content
LINE 1: SELECT xml '<!DOCTYPE a><a/><b/>';
^
DETAIL: line 1: Extra content at the end of the document
<!DOCTYPE a><a/><b/>
^
-- 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 '<abc>x</abc>');
CREATE VIEW xmlview6 AS SELECT xmlpi(name foo, 'bar');
CREATE VIEW xmlview7 AS SELECT xmlroot(xml '<foo/>', 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);
CREATE VIEW xmlview10 AS SELECT xmlserialize(document '<foo><bar>42</bar></foo>' AS text indent);
CREATE VIEW xmlview11 AS SELECT xmlserialize(document '<foo><bar>42</bar></foo>' AS character varying no indent);
SELECT table_name, view_definition FROM information_schema.views
WHERE table_name LIKE 'xmlview%' ORDER BY 1;
table_name | view_definition
------------+---------------------------------------------------------------------------------------------------------------------------------------
xmlview1 | SELECT xmlcomment('test'::text) AS xmlcomment;
xmlview10 | SELECT XMLSERIALIZE(DOCUMENT '<foo><bar>42</bar></foo>'::xml AS text INDENT) AS "xmlserialize";
xmlview11 | SELECT (XMLSERIALIZE(DOCUMENT '<foo><bar>42</bar></foo>'::xml AS character varying NO INDENT))::character varying AS "xmlserialize";
xmlview2 | SELECT XMLCONCAT('hello'::xml, 'you'::xml) AS "xmlconcat";
xmlview3 | SELECT XMLELEMENT(NAME element, XMLATTRIBUTES(1 AS ":one:", 'deuce' AS two), 'content&') AS "xmlelement";
xmlview4 | SELECT XMLELEMENT(NAME employee, XMLFOREST(name AS name, age AS age, salary AS pay)) AS "xmlelement" +
| FROM emp;
xmlview5 | SELECT XMLPARSE(CONTENT '<abc>x</abc>'::text STRIP WHITESPACE) AS "xmlparse";
xmlview6 | SELECT XMLPI(NAME foo, 'bar'::text) AS "xmlpi";
xmlview7 | SELECT XMLROOT('<foo/>'::xml, VERSION NO VALUE, STANDALONE YES) AS "xmlroot";
xmlview8 | SELECT (XMLSERIALIZE(CONTENT 'good'::xml AS character(10) NO INDENT))::character(10) AS "xmlserialize";
xmlview9 | SELECT XMLSERIALIZE(CONTENT 'good'::xml AS text NO INDENT) AS "xmlserialize";
(11 rows)
-- Text XPath expressions evaluation
SELECT xpath('/value', data) FROM xmltest;
xpath
----------------------
{<value>one</value>}
{<value>two</value>}
(2 rows)
SELECT xpath(NULL, NULL) IS NULL FROM xmltest;
?column?
----------
t
t
(2 rows)
SELECT COUNT(id) FROM xmltest WHERE xmlexists('/menu/beer' PASSING BY REF data BY REF);
count
------- 0
(1 row)
SELECT COUNT(id) FROM xmltest WHERE xmlexists('/menu/beers' PASSING BY REF data);
count
------- 2
(1 row)
SELECT COUNT(id) FROM xmltest WHERE xmlexists('/menu/beers/name[text() = ''Molson'']' PASSING BY REF data);
count
------- 1
(1 row)
SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/menu/beer',data);
count
------- 0
(1 row)
SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/menu/beers',data);
count
------- 2
(1 row)
SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/menu/beers/name[text() = ''Molson'']',data);
count
------- 1
(1 row)
SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/myns:menu/myns:beer',data,ARRAY[ARRAY['myns','http://myns.com']]);
count
------- 0
(1 row)
SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/myns:menu/myns:beers',data,ARRAY[ARRAY['myns','http://myns.com']]);
count
------- 2
(1 row)
SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/myns:menu/myns:beers/myns:name[text() = ''Molson'']',data,ARRAY[ARRAY['myns','http://myns.com']]);
count
------- 1
(1 row)
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);
count
------- 2
(1 row)
-- Test xml_is_well_formed and variants
SELECT xml_is_well_formed_document('<foo>bar</foo>');
xml_is_well_formed_document
-----------------------------
t
(1 row)
SELECT xml_is_well_formed_document('abc');
xml_is_well_formed_document
-----------------------------
f
(1 row)
SELECT xml_is_well_formed_content('<foo>bar</foo>');
xml_is_well_formed_content
----------------------------
t
(1 row)
SELECT xml_is_well_formed_content('abc');
xml_is_well_formed_content
----------------------------
t
(1 row)
SET xmloption TO DOCUMENT;
SELECT xml_is_well_formed('abc');
xml_is_well_formed
--------------------
f
(1 row)
SELECT xml_is_well_formed('<>');
xml_is_well_formed
--------------------
f
(1 row)
SELECT xml_is_well_formed('<abc/>');
xml_is_well_formed
--------------------
t
(1 row)
SELECT xml_is_well_formed('<foo>bar</foo>');
xml_is_well_formed
--------------------
t
(1 row)
SELECT xml_is_well_formed('<foo>bar</foo');
xml_is_well_formed
--------------------
f
(1 row)
SELECT xml_is_well_formed('<foo><bar>baz</foo>');
xml_is_well_formed
--------------------
f
(1 row)
SELECT xml_is_well_formed('<pg:foo xmlns:pg="http://postgresql.org/stuff">bar</pg:foo>');
xml_is_well_formed
--------------------
t
(1 row)
SELECT xml_is_well_formed('<invalidentity>&</abc>');
xml_is_well_formed
--------------------
f
(1 row)
SELECT xml_is_well_formed('<undefinedentity>&idontexist;</abc>');
xml_is_well_formed
--------------------
f
(1 row)
SELECT xml_is_well_formed('<invalidns xmlns=''<''/>');
xml_is_well_formed
--------------------
t
(1 row)
SELECT xml_is_well_formed('<relativens xmlns=''relative''/>');
xml_is_well_formed
--------------------
t
(1 row)
SELECT xml_is_well_formed('<twoerrors>&idontexist;</unbalanced>');
xml_is_well_formed
--------------------
f
(1 row)
SET xmloption TO CONTENT;
SELECT xml_is_well_formed('abc');
xml_is_well_formed
--------------------
t
(1 row)
-- 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
-- <invalidns xmlns='<'/>
-- 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('/*', '<invalidns xmlns=''<''/>');
ERROR: could not parse XML document
\set VERBOSITY default
-- Again, the XML isn't well-formed for namespace purposes
SELECT xpath('/*', '<nosuchprefix:tag/>');
ERROR: could not parse XML document
DETAIL: line 1: Namespace prefix nosuchprefix on tag is not defined
<nosuchprefix:tag/>
^
CONTEXT: SQL function "xpath" statement 1
-- XPath deprecates relative namespaces, but they're not supposed to
-- throw an error, only a warning.
SELECT xpath('/*', '<relativens xmlns=''relative''/>');
WARNING: line 1: xmlns: URI relative is not absolute
<relativens xmlns='relative'/>
^
xpath
--------------------------------------
{"<relativens xmlns=\"relative\"/>"}
(1 row)
-- External entity references should not leak filesystem information.
SELECT XMLPARSE(DOCUMENT '<!DOCTYPE foo [<!ENTITY c SYSTEM "/etc/passwd">]><foo>&c;</foo>');
xmlparse
-----------------------------------------------------------------
<!DOCTYPE foo [<!ENTITY c SYSTEM "/etc/passwd">]><foo>&c;</foo>
(1 row)
SELECT XMLPARSE(DOCUMENT '<!DOCTYPE foo [<!ENTITY c SYSTEM "/etc/no.such.file">]><foo>&c;</foo>');
xmlparse
-----------------------------------------------------------------------
<!DOCTYPE foo [<!ENTITY c SYSTEM "/etc/no.such.file">]><foo>&c;</foo>
(1 row)
-- This might or might not load the requested DTD, but it mustn't throw error.
SELECT XMLPARSE(DOCUMENT '<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"><chapter> </chapter>');
xmlparse
------------------------------------------------------------------------------------------------------------------------------------------------------
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"><chapter> </chapter>
(1 row)
-- XMLPATH tests
CREATE TABLE xmldata(data xml);
INSERT INTO xmldata VALUES('<ROWS>
<ROW id="1">
<COUNTRY_ID>AU</COUNTRY_ID>
<COUNTRY_NAME>Australia</COUNTRY_NAME>
<REGION_ID>3</REGION_ID>
</ROW>
<ROW id="2">
<COUNTRY_ID>CN</COUNTRY_ID>
<COUNTRY_NAME>China</COUNTRY_NAME>
<REGION_ID>3</REGION_ID>
</ROW>
<ROW id="3">
<COUNTRY_ID>HK</COUNTRY_ID>
<COUNTRY_NAME>HongKong</COUNTRY_NAME>
<REGION_ID>3</REGION_ID>
</ROW>
<ROW id="4">
<COUNTRY_ID>IN</COUNTRY_ID>
<COUNTRY_NAME>India</COUNTRY_NAME>
<REGION_ID>3</REGION_ID>
</ROW>
<ROW id="5">
<COUNTRY_ID>JP</COUNTRY_ID>
<COUNTRY_NAME>Japan</COUNTRY_NAME>
<REGION_ID>3</REGION_ID><PREMIER_NAME>Sinzo Abe</PREMIER_NAME>
</ROW>
<ROW id="6">
<COUNTRY_ID>SG</COUNTRY_ID>
<COUNTRY_NAME>Singapore</COUNTRY_NAME>
<REGION_ID>3</REGION_ID><SIZE unit="km">791</SIZE>
</ROW>
</ROWS>');
-- 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');
id | _id | country_name | country_id | region_id | size | unit | premier_name
----+-----+--------------+------------+-----------+------+------+--------------- 1 | 1 | Australia | AU | 3 | | | not specified 2 | 2 | China | CN | 3 | | | not specified 3 | 3 | HongKong | HK | 3 | | | not specified 4 | 4 | India | IN | 3 | | | not specified 5 | 5 | Japan | JP | 3 | | | Sinzo Abe 6 | 6 | Singapore | SG | 3 | 791 | km | not specified
(6 rows)
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;
id | _id | country_name | country_id | region_id | size | unit | premier_name
----+-----+--------------+------------+-----------+------+------+--------------- 1 | 1 | Australia | AU | 3 | | | not specified 2 | 2 | China | CN | 3 | | | not specified 3 | 3 | HongKong | HK | 3 | | | not specified 4 | 4 | India | IN | 3 | | | not specified 5 | 5 | Japan | JP | 3 | | | Sinzo Abe 6 | 6 | Singapore | SG | 3 | 791 | km | not specified
(6 rows)
\sv xmltableview1
CREATE OR REPLACE VIEW public.xmltableview1 AS
SELECT "xmltable".id,
"xmltable"._id,
"xmltable".country_name,
"xmltable".country_id,
"xmltable".region_id,
"xmltable".size,
"xmltable".unit,
"xmltable".premier_name
FROM ( SELECT xmldata.data
FROM xmldata) x,
LATERAL XMLTABLE(('/ROWS/ROW'::text) PASSING (x.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME/text()'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
EXPLAIN (COSTS OFF) SELECT * FROM xmltableview1;
QUERY PLAN
-----------------------------------------
Nested Loop
-> Seq Scan on xmldata
-> Table Function Scan on "xmltable"
(3 rows)
EXPLAIN (COSTS OFF, VERBOSE) SELECT * FROM xmltableview1;
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Nested Loop
Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
-> Seq Scan on public.xmldata
Output: xmldata.data
-> Table Function Scan on "xmltable"
Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME/text()'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
(7 rows)
-- errors
SELECT * FROM XMLTABLE (ROW () PASSING null COLUMNS v1 timestamp) AS f (v1, v2);
ERROR: XMLTABLE function has 1 columns available but 2 columns specified
SELECT * FROM XMLTABLE (ROW () PASSING null COLUMNS v1 timestamp __pg__is_not_null 1) AS f (v1);
ERROR: option name "__pg__is_not_null" cannot be used in XMLTABLE
LINE 1: ...MLTABLE (ROW () PASSING null COLUMNS v1 timestamp __pg__is_n...
^
-- XMLNAMESPACES tests
SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS zz),
'/zz:rows/zz:row'
PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
COLUMNS a int PATH 'zz:a');
a
---- 10
(1 row)
CREATE VIEW xmltableview2 AS SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS "Zz"),
'/Zz:rows/Zz:row'
PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
COLUMNS a int PATH 'Zz:a');
SELECT * FROM xmltableview2;
a
---- 10
(1 row)
\sv xmltableview2
CREATE OR REPLACE VIEW public.xmltableview2 AS
SELECT a
FROM XMLTABLE(XMLNAMESPACES ('http://x.y'::text AS "Zz"), ('/Zz:rows/Zz:row'::text) PASSING ('<rows xmlns="http://x.y"><row><a>10</a></row></rows>'::xml) COLUMNS a integer PATH ('Zz:a'::text))
SELECT * FROM XMLTABLE(XMLNAMESPACES(DEFAULT 'http://x.y'),
'/rows/row'
PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
COLUMNS a int PATH 'a');
ERROR: DEFAULT namespace is not supported
SELECT * FROM XMLTABLE('.'
PASSING '<foo/>'
COLUMNS a text PATH 'foo/namespace::node()');
a
-------------------------------------- http://www.w3.org/XML/1998/namespace
(1 row)
-- 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;
id | _id | country_name | country_id | region_id | size | unit | premier_name
----+-----+--------------+------------+-----------+------+------+--------------- 1 | 1 | Australia | AU | 3 | | | not specified 2 | 2 | China | CN | 3 | | | not specified 3 | 3 | HongKong | HK | 3 | | | not specified 4 | 4 | India | IN | 3 | | | not specified 5 | 5 | Japan | JP | 3 | | | Sinzo Abe 6 | 6 | Singapore | SG | 3 | 791 | km | not specified
(6 rows)
SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int);
COUNTRY_NAME | REGION_ID
--------------+-----------
India | 3
Japan | 3
(2 rows)
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);
id | COUNTRY_NAME | REGION_ID
----+--------------+----------- 1 | India | 3 2 | Japan | 3
(2 rows)
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);
id | COUNTRY_NAME | REGION_ID
----+--------------+----------- 4 | India | 3 5 | Japan | 3
(2 rows)
SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id');
id
---- 4 5
(2 rows)
SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id FOR ORDINALITY);
id
---- 1 2
(2 rows)
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 '.');
id | COUNTRY_NAME | REGION_ID | rawdata
----+--------------+-----------+------------------------------------------------------------------ 4 | India | 3 | <ROW id="4"> +
| | | <COUNTRY_ID>IN</COUNTRY_ID> +
| | | <COUNTRY_NAME>India</COUNTRY_NAME> +
| | | <REGION_ID>3</REGION_ID> +
| | | </ROW> 5 | Japan | 3 | <ROW id="5"> +
| | | <COUNTRY_ID>JP</COUNTRY_ID> +
| | | <COUNTRY_NAME>Japan</COUNTRY_NAME> +
| | | <REGION_ID>3</REGION_ID><PREMIER_NAME>Sinzo Abe</PREMIER_NAME>+
| | | </ROW>
(2 rows)
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 './*');
id | COUNTRY_NAME | REGION_ID | rawdata
----+--------------+-----------+----------------------------------------------------------------------------------------------------------------------------- 4 | India | 3 | <COUNTRY_ID>IN</COUNTRY_ID><COUNTRY_NAME>India</COUNTRY_NAME><REGION_ID>3</REGION_ID> 5 | Japan | 3 | <COUNTRY_ID>JP</COUNTRY_ID><COUNTRY_NAME>Japan</COUNTRY_NAME><REGION_ID>3</REGION_ID><PREMIER_NAME>Sinzo Abe</PREMIER_NAME>
(2 rows)
SELECT * FROM xmltable('/root' passing '<root><element>a1a<!-- aaaa -->a2a<?aaaaa?> <!--z--> bbbb<x>xxx</x>cccc</element></root>' COLUMNS element text);
element
----------------------
a1aa2a bbbbxxxcccc
(1 row)
SELECT * FROM xmltable('/root' passing '<root><element>a1a<!-- aaaa -->a2a<?aaaaa?> <!--z--> bbbb<x>xxx</x>cccc</element></root>' COLUMNS element text PATH 'element/text()'); -- should fail
ERROR: more than one value returned by column XPath expression
-- CDATA test
select * from xmltable('d/r' passing '<d><r><c><![CDATA[<hello> &"<>!<a>foo</a>]]></c></r><r><c>2</c></r></d>' columns c text);
c
-------------------------
<hello> &"<>!<a>foo</a> 2
(2 rows)
-- XML builtin entities
SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>'</ent></a><a><ent>"</ent></a><a><ent>&</ent></a><a><ent><</ent></a><a><ent>></ent></a></x>' COLUMNS ent text);
ent
-----
'
"
&
<
>
(5 rows)
SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>'</ent></a><a><ent>"</ent></a><a><ent>&</ent></a><a><ent><</ent></a><a><ent>></ent></a></x>' COLUMNS ent xml);
ent
------------------
<ent>'</ent>
<ent>"</ent>
<ent>&</ent>
<ent><</ent>
<ent>></ent>
(5 rows)
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');
QUERY PLAN
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Nested Loop
Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
-> Seq Scan on public.xmldata
Output: xmldata.data
-> Table Function Scan on "xmltable"
Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
(7 rows)
-- 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';
COUNTRY_NAME | REGION_ID
--------------+-----------
Japan | 3
(1 row)
EXPLAIN (VERBOSE, COSTS OFF)
SELECT f.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) AS f WHERE "COUNTRY_NAME" = 'Japan';
QUERY PLAN
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Nested Loop
Output: f."COUNTRY_NAME", f."REGION_ID"
-> Seq Scan on public.xmldata
Output: xmldata.data
-> Table Function Scan on "xmltable" f
Output: f."COUNTRY_NAME", f."REGION_ID"
Table Function Call: XMLTABLE(('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]'::text) PASSING (xmldata.data) COLUMNS "COUNTRY_NAME" text, "REGION_ID" integer)
Filter: (f."COUNTRY_NAME" = 'Japan'::text)
(8 rows)
-- should to work with more data
INSERT INTO xmldata VALUES('<ROWS>
<ROW id="10">
<COUNTRY_ID>CZ</COUNTRY_ID>
<COUNTRY_NAME>Czech Republic</COUNTRY_NAME>
<REGION_ID>2</REGION_ID><PREMIER_NAME>Milos Zeman</PREMIER_NAME>
</ROW>
<ROW id="11">
<COUNTRY_ID>DE</COUNTRY_ID>
<COUNTRY_NAME>Germany</COUNTRY_NAME>
<REGION_ID>2</REGION_ID>
</ROW>
<ROW id="12">
<COUNTRY_ID>FR</COUNTRY_ID>
<COUNTRY_NAME>France</COUNTRY_NAME>
<REGION_ID>2</REGION_ID>
</ROW>
</ROWS>');
INSERT INTO xmldata VALUES('<ROWS>
<ROW id="20">
<COUNTRY_ID>EG</COUNTRY_ID>
<COUNTRY_NAME>Egypt</COUNTRY_NAME>
<REGION_ID>1</REGION_ID>
</ROW>
<ROW id="21">
<COUNTRY_ID>SD</COUNTRY_ID>
<COUNTRY_NAME>Sudan</COUNTRY_NAME>
<REGION_ID>1</REGION_ID>
</ROW>
</ROWS>');
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');
id | _id | country_name | country_id | region_id | size | unit | premier_name
----+-----+----------------+------------+-----------+------+------+--------------- 1 | 1 | Australia | AU | 3 | | | not specified 2 | 2 | China | CN | 3 | | | not specified 3 | 3 | HongKong | HK | 3 | | | not specified 4 | 4 | India | IN | 3 | | | not specified 5 | 5 | Japan | JP | 3 | | | Sinzo Abe 6 | 6 | Singapore | SG | 3 | 791 | km | not specified 10 | 1 | Czech Republic | CZ | 2 | | | Milos Zeman 11 | 2 | Germany | DE | 2 | | | not specified 12 | 3 | France | FR | 2 | | | not specified 20 | 1 | Egypt | EG | 1 | | | not specified 21 | 2 | Sudan | SD | 1 | | | not specified
(11 rows)
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;
id | _id | country_name | country_id | region_id | size | unit | premier_name
----+-----+----------------+------------+-----------+------+------+--------------- 10 | 1 | Czech Republic | CZ | 2 | | | Milos Zeman 11 | 2 | Germany | DE | 2 | | | not specified 12 | 3 | France | FR | 2 | | | not specified
(3 rows)
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;
QUERY PLAN
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Nested Loop
Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
-> Seq Scan on public.xmldata
Output: xmldata.data
-> Table Function Scan on "xmltable"
Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
Filter: ("xmltable".region_id = 2)
(8 rows)
-- 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');
ERROR: null is not allowed in column "size"
-- 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;
proname | proowner | procost | pronargs | proargnames | proargtypes
---------+----------+---------+----------+-------------+-------------
(0 rows)
-- 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;
proname | proowner | procost | pronargs | proargnames | proargtypes
---------+----------+---------+----------+-------------+-------------
(0 rows)
CREATE TABLE xmltest2(x xml, _path text);
INSERT INTO xmltest2 VALUES('<d><r><ac>1</ac></r></d>', 'A');
INSERT INTO xmltest2 VALUES('<d><r><bc>2</bc></r></d>', 'B');
INSERT INTO xmltest2 VALUES('<d><r><cc>3</cc></r></d>', 'C');
INSERT INTO xmltest2 VALUES('<d><r><dc>2</dc></r></d>', 'D');
SELECT xmltable.* FROM xmltest2, LATERAL xmltable('/d/r' PASSING x COLUMNS a int PATH '' || lower(_path) || 'c');
a
--- 1 2 3 2
(4 rows)
SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH '.');
a
--- 1 2 3 2
(4 rows)
SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH 'x' DEFAULT ascii(_path) - 54);
a
---- 11 12 13 14
(4 rows)
-- XPath result can be boolean or number too
SELECT * FROM XMLTABLE('*' PASSING '<a>a</a>' COLUMNS a xml PATH '.', b text PATH '.', c text PATH '"hi"', d boolean PATH '. = "a"', e integer PATH 'string-length(.)');
a | b | c | d | e
----------+---+----+---+---
<a>a</a> | a | hi | t | 1
(1 row)
\x
SELECT * FROM XMLTABLE('*' PASSING '<e>pre<!--c1--><?pi arg?><![CDATA[&ent1]]><n2>&deep</n2>post</e>' COLUMNS x xml PATH '/e/n2', y xml PATH '/');
-[ RECORD 1 ]-----------------------------------------------------------
x | <n2>&deep</n2>
y | <e>pre<!--c1--><?pi arg?><![CDATA[&ent1]]><n2>&deep</n2>post</e>+
|
\x
SELECT * FROM XMLTABLE('.' PASSING XMLELEMENT(NAME a) columns a varchar(20) PATH '"<foo/>"', b xml PATH '"<foo/>"');
a | b
--------+--------------
<foo/> | <foo/>
(1 row)
