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-rw-r--r--contrib/xml2/.gitignore4
-rw-r--r--contrib/xml2/Makefile26
-rw-r--r--contrib/xml2/expected/xml2.out224
-rw-r--r--contrib/xml2/expected/xml2_1.out168
-rw-r--r--contrib/xml2/sql/xml2.sql139
-rw-r--r--contrib/xml2/xml2--1.0--1.1.sql18
-rw-r--r--contrib/xml2/xml2--1.1.sql73
-rw-r--r--contrib/xml2/xml2.control6
-rw-r--r--contrib/xml2/xpath.c845
-rw-r--r--contrib/xml2/xslt_proc.c256
10 files changed, 1759 insertions, 0 deletions
diff --git a/contrib/xml2/.gitignore b/contrib/xml2/.gitignore
new file mode 100644
index 0000000..5dcb3ff
--- /dev/null
+++ b/contrib/xml2/.gitignore
@@ -0,0 +1,4 @@
+# Generated subdirectories
+/log/
+/results/
+/tmp_check/
diff --git a/contrib/xml2/Makefile b/contrib/xml2/Makefile
new file mode 100644
index 0000000..0d703fe
--- /dev/null
+++ b/contrib/xml2/Makefile
@@ -0,0 +1,26 @@
+# contrib/xml2/Makefile
+
+MODULE_big = pgxml
+OBJS = \
+ $(WIN32RES) \
+ xpath.o \
+ xslt_proc.o
+
+EXTENSION = xml2
+DATA = xml2--1.1.sql xml2--1.0--1.1.sql
+PGFILEDESC = "xml2 - XPath querying and XSLT"
+
+REGRESS = xml2
+
+SHLIB_LINK += $(filter -lxslt, $(LIBS)) -lxml2
+
+ifdef USE_PGXS
+PG_CONFIG = pg_config
+PGXS := $(shell $(PG_CONFIG) --pgxs)
+include $(PGXS)
+else
+subdir = contrib/xml2
+top_builddir = ../..
+include $(top_builddir)/src/Makefile.global
+include $(top_srcdir)/contrib/contrib-global.mk
+endif
diff --git a/contrib/xml2/expected/xml2.out b/contrib/xml2/expected/xml2.out
new file mode 100644
index 0000000..eba6ae6
--- /dev/null
+++ b/contrib/xml2/expected/xml2.out
@@ -0,0 +1,224 @@
+CREATE EXTENSION xml2;
+select query_to_xml('select 1 as x',true,false,'');
+ query_to_xml
+---------------------------------------------------------------
+ <table xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">+
+ +
+ <row> +
+ <x>1</x> +
+ </row> +
+ +
+ </table> +
+
+(1 row)
+
+select xslt_process( query_to_xml('select x from generate_series(1,5) as
+x',true,false,'')::text,
+$$<xsl:stylesheet version="1.0"
+ xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+<xsl:output method="xml" indent="yes" />
+<xsl:template match="*">
+ <xsl:copy>
+ <xsl:copy-of select="@*" />
+ <xsl:apply-templates />
+ </xsl:copy>
+</xsl:template>
+<xsl:template match="comment()|processing-instruction()">
+ <xsl:copy />
+</xsl:template>
+</xsl:stylesheet>
+$$::text);
+ xslt_process
+---------------------------------------------------------------
+ <?xml version="1.0"?> +
+ <table xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">+
+ +
+ <row> +
+ <x>1</x> +
+ </row> +
+ +
+ <row> +
+ <x>2</x> +
+ </row> +
+ +
+ <row> +
+ <x>3</x> +
+ </row> +
+ +
+ <row> +
+ <x>4</x> +
+ </row> +
+ +
+ <row> +
+ <x>5</x> +
+ </row> +
+ +
+ </table> +
+
+(1 row)
+
+CREATE TABLE xpath_test (id integer NOT NULL, t xml);
+INSERT INTO xpath_test VALUES (1, '<doc><int>1</int></doc>');
+SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
+as t(id int4);
+ id
+----
+(0 rows)
+
+SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
+as t(id int4, doc int4);
+ id | doc
+----+-----
+ 1 | 1
+(1 row)
+
+DROP TABLE xpath_test;
+CREATE TABLE xpath_test (id integer NOT NULL, t text);
+INSERT INTO xpath_test VALUES (1, '<doc><int>1</int></doc>');
+SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
+as t(id int4);
+ id
+----
+(0 rows)
+
+SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
+as t(id int4, doc int4);
+ id | doc
+----+-----
+ 1 | 1
+(1 row)
+
+create table articles (article_id integer, article_xml xml, date_entered date);
+insert into articles (article_id, article_xml, date_entered)
+values (2, '<article><author>test</author><pages>37</pages></article>', now());
+SELECT * FROM
+xpath_table('article_id',
+ 'article_xml',
+ 'articles',
+ '/article/author|/article/pages|/article/title',
+ 'date_entered > ''2003-01-01'' ')
+AS t(article_id integer, author text, page_count integer, title text);
+ article_id | author | page_count | title
+------------+--------+------------+-------
+ 2 | test | 37 |
+(1 row)
+
+-- this used to fail when invoked a second time
+select xslt_process('<aaa/>',$$<xsl:stylesheet version="1.0"
+xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+<xsl:template match="@*|node()">
+ <xsl:copy>
+ <xsl:apply-templates select="@*|node()"/>
+ </xsl:copy>
+ </xsl:template>
+</xsl:stylesheet>$$)::xml;
+ xslt_process
+--------------
+ <aaa/> +
+
+(1 row)
+
+select xslt_process('<aaa/>',$$<xsl:stylesheet version="1.0"
+xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+<xsl:template match="@*|node()">
+ <xsl:copy>
+ <xsl:apply-templates select="@*|node()"/>
+ </xsl:copy>
+ </xsl:template>
+</xsl:stylesheet>$$)::xml;
+ xslt_process
+--------------
+ <aaa/> +
+
+(1 row)
+
+create table t1 (id integer, xml_data xml);
+insert into t1 (id, xml_data)
+values
+(1, '<attributes><attribute name="attr_1">Some
+Value</attribute></attributes>');
+create index idx_xpath on t1 ( xpath_string
+('/attributes/attribute[@name="attr_1"]/text()', xml_data::text));
+SELECT xslt_process('<employee><name>cim</name><age>30</age><pay>400</pay></employee>'::text, $$<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
+ <xsl:output method="xml" omit-xml-declaration="yes" indent="yes"/>
+ <xsl:strip-space elements="*"/>
+ <xsl:param name="n1"/>
+ <xsl:param name="n2"/>
+ <xsl:param name="n3"/>
+ <xsl:param name="n4"/>
+ <xsl:param name="n5" select="'me'"/>
+ <xsl:template match="*">
+ <xsl:element name="samples">
+ <xsl:element name="sample">
+ <xsl:value-of select="$n1"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n2"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n3"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n4"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n5"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n6"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n7"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n8"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n9"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n10"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n11"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n12"/>
+ </xsl:element>
+ </xsl:element>
+ </xsl:template>
+</xsl:stylesheet>$$::text, 'n1="v1",n2="v2",n3="v3",n4="v4",n5="v5",n6="v6",n7="v7",n8="v8",n9="v9",n10="v10",n11="v11",n12="v12"'::text);
+ xslt_process
+------------------------
+ <samples> +
+ <sample>v1</sample> +
+ <sample>v2</sample> +
+ <sample>v3</sample> +
+ <sample>v4</sample> +
+ <sample>v5</sample> +
+ <sample>v6</sample> +
+ <sample>v7</sample> +
+ <sample>v8</sample> +
+ <sample>v9</sample> +
+ <sample>v10</sample>+
+ <sample>v11</sample>+
+ <sample>v12</sample>+
+ </samples> +
+
+(1 row)
+
+-- possible security exploit
+SELECT xslt_process('<xml><foo>Hello from XML</foo></xml>',
+$$<xsl:stylesheet version="1.0"
+ xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ xmlns:sax="http://icl.com/saxon"
+ extension-element-prefixes="sax">
+
+ <xsl:template match="//foo">
+ <sax:output href="0wn3d.txt" method="text">
+ <xsl:value-of select="'0wn3d via xml2 extension and libxslt'"/>
+ <xsl:apply-templates/>
+ </sax:output>
+ </xsl:template>
+</xsl:stylesheet>$$);
+ERROR: failed to apply stylesheet
diff --git a/contrib/xml2/expected/xml2_1.out b/contrib/xml2/expected/xml2_1.out
new file mode 100644
index 0000000..bac90e5
--- /dev/null
+++ b/contrib/xml2/expected/xml2_1.out
@@ -0,0 +1,168 @@
+CREATE EXTENSION xml2;
+select query_to_xml('select 1 as x',true,false,'');
+ query_to_xml
+---------------------------------------------------------------
+ <table xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">+
+ +
+ <row> +
+ <x>1</x> +
+ </row> +
+ +
+ </table> +
+
+(1 row)
+
+select xslt_process( query_to_xml('select x from generate_series(1,5) as
+x',true,false,'')::text,
+$$<xsl:stylesheet version="1.0"
+ xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+<xsl:output method="xml" indent="yes" />
+<xsl:template match="*">
+ <xsl:copy>
+ <xsl:copy-of select="@*" />
+ <xsl:apply-templates />
+ </xsl:copy>
+</xsl:template>
+<xsl:template match="comment()|processing-instruction()">
+ <xsl:copy />
+</xsl:template>
+</xsl:stylesheet>
+$$::text);
+ERROR: xslt_process() is not available without libxslt
+CREATE TABLE xpath_test (id integer NOT NULL, t xml);
+INSERT INTO xpath_test VALUES (1, '<doc><int>1</int></doc>');
+SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
+as t(id int4);
+ id
+----
+(0 rows)
+
+SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
+as t(id int4, doc int4);
+ id | doc
+----+-----
+ 1 | 1
+(1 row)
+
+DROP TABLE xpath_test;
+CREATE TABLE xpath_test (id integer NOT NULL, t text);
+INSERT INTO xpath_test VALUES (1, '<doc><int>1</int></doc>');
+SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
+as t(id int4);
+ id
+----
+(0 rows)
+
+SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
+as t(id int4, doc int4);
+ id | doc
+----+-----
+ 1 | 1
+(1 row)
+
+create table articles (article_id integer, article_xml xml, date_entered date);
+insert into articles (article_id, article_xml, date_entered)
+values (2, '<article><author>test</author><pages>37</pages></article>', now());
+SELECT * FROM
+xpath_table('article_id',
+ 'article_xml',
+ 'articles',
+ '/article/author|/article/pages|/article/title',
+ 'date_entered > ''2003-01-01'' ')
+AS t(article_id integer, author text, page_count integer, title text);
+ article_id | author | page_count | title
+------------+--------+------------+-------
+ 2 | test | 37 |
+(1 row)
+
+-- this used to fail when invoked a second time
+select xslt_process('<aaa/>',$$<xsl:stylesheet version="1.0"
+xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+<xsl:template match="@*|node()">
+ <xsl:copy>
+ <xsl:apply-templates select="@*|node()"/>
+ </xsl:copy>
+ </xsl:template>
+</xsl:stylesheet>$$)::xml;
+ERROR: xslt_process() is not available without libxslt
+select xslt_process('<aaa/>',$$<xsl:stylesheet version="1.0"
+xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+<xsl:template match="@*|node()">
+ <xsl:copy>
+ <xsl:apply-templates select="@*|node()"/>
+ </xsl:copy>
+ </xsl:template>
+</xsl:stylesheet>$$)::xml;
+ERROR: xslt_process() is not available without libxslt
+create table t1 (id integer, xml_data xml);
+insert into t1 (id, xml_data)
+values
+(1, '<attributes><attribute name="attr_1">Some
+Value</attribute></attributes>');
+create index idx_xpath on t1 ( xpath_string
+('/attributes/attribute[@name="attr_1"]/text()', xml_data::text));
+SELECT xslt_process('<employee><name>cim</name><age>30</age><pay>400</pay></employee>'::text, $$<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
+ <xsl:output method="xml" omit-xml-declaration="yes" indent="yes"/>
+ <xsl:strip-space elements="*"/>
+ <xsl:param name="n1"/>
+ <xsl:param name="n2"/>
+ <xsl:param name="n3"/>
+ <xsl:param name="n4"/>
+ <xsl:param name="n5" select="'me'"/>
+ <xsl:template match="*">
+ <xsl:element name="samples">
+ <xsl:element name="sample">
+ <xsl:value-of select="$n1"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n2"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n3"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n4"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n5"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n6"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n7"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n8"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n9"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n10"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n11"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n12"/>
+ </xsl:element>
+ </xsl:element>
+ </xsl:template>
+</xsl:stylesheet>$$::text, 'n1="v1",n2="v2",n3="v3",n4="v4",n5="v5",n6="v6",n7="v7",n8="v8",n9="v9",n10="v10",n11="v11",n12="v12"'::text);
+ERROR: xslt_process() is not available without libxslt
+-- possible security exploit
+SELECT xslt_process('<xml><foo>Hello from XML</foo></xml>',
+$$<xsl:stylesheet version="1.0"
+ xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ xmlns:sax="http://icl.com/saxon"
+ extension-element-prefixes="sax">
+
+ <xsl:template match="//foo">
+ <sax:output href="0wn3d.txt" method="text">
+ <xsl:value-of select="'0wn3d via xml2 extension and libxslt'"/>
+ <xsl:apply-templates/>
+ </sax:output>
+ </xsl:template>
+</xsl:stylesheet>$$);
+ERROR: xslt_process() is not available without libxslt
diff --git a/contrib/xml2/sql/xml2.sql b/contrib/xml2/sql/xml2.sql
new file mode 100644
index 0000000..ac49cfa
--- /dev/null
+++ b/contrib/xml2/sql/xml2.sql
@@ -0,0 +1,139 @@
+CREATE EXTENSION xml2;
+
+select query_to_xml('select 1 as x',true,false,'');
+
+select xslt_process( query_to_xml('select x from generate_series(1,5) as
+x',true,false,'')::text,
+$$<xsl:stylesheet version="1.0"
+ xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+<xsl:output method="xml" indent="yes" />
+<xsl:template match="*">
+ <xsl:copy>
+ <xsl:copy-of select="@*" />
+ <xsl:apply-templates />
+ </xsl:copy>
+</xsl:template>
+<xsl:template match="comment()|processing-instruction()">
+ <xsl:copy />
+</xsl:template>
+</xsl:stylesheet>
+$$::text);
+
+CREATE TABLE xpath_test (id integer NOT NULL, t xml);
+INSERT INTO xpath_test VALUES (1, '<doc><int>1</int></doc>');
+SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
+as t(id int4);
+SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
+as t(id int4, doc int4);
+
+DROP TABLE xpath_test;
+CREATE TABLE xpath_test (id integer NOT NULL, t text);
+INSERT INTO xpath_test VALUES (1, '<doc><int>1</int></doc>');
+SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
+as t(id int4);
+SELECT * FROM xpath_table('id', 't', 'xpath_test', '/doc/int', 'true')
+as t(id int4, doc int4);
+
+create table articles (article_id integer, article_xml xml, date_entered date);
+insert into articles (article_id, article_xml, date_entered)
+values (2, '<article><author>test</author><pages>37</pages></article>', now());
+SELECT * FROM
+xpath_table('article_id',
+ 'article_xml',
+ 'articles',
+ '/article/author|/article/pages|/article/title',
+ 'date_entered > ''2003-01-01'' ')
+AS t(article_id integer, author text, page_count integer, title text);
+
+-- this used to fail when invoked a second time
+select xslt_process('<aaa/>',$$<xsl:stylesheet version="1.0"
+xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+<xsl:template match="@*|node()">
+ <xsl:copy>
+ <xsl:apply-templates select="@*|node()"/>
+ </xsl:copy>
+ </xsl:template>
+</xsl:stylesheet>$$)::xml;
+
+select xslt_process('<aaa/>',$$<xsl:stylesheet version="1.0"
+xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+<xsl:template match="@*|node()">
+ <xsl:copy>
+ <xsl:apply-templates select="@*|node()"/>
+ </xsl:copy>
+ </xsl:template>
+</xsl:stylesheet>$$)::xml;
+
+create table t1 (id integer, xml_data xml);
+insert into t1 (id, xml_data)
+values
+(1, '<attributes><attribute name="attr_1">Some
+Value</attribute></attributes>');
+
+create index idx_xpath on t1 ( xpath_string
+('/attributes/attribute[@name="attr_1"]/text()', xml_data::text));
+
+SELECT xslt_process('<employee><name>cim</name><age>30</age><pay>400</pay></employee>'::text, $$<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
+ <xsl:output method="xml" omit-xml-declaration="yes" indent="yes"/>
+ <xsl:strip-space elements="*"/>
+ <xsl:param name="n1"/>
+ <xsl:param name="n2"/>
+ <xsl:param name="n3"/>
+ <xsl:param name="n4"/>
+ <xsl:param name="n5" select="'me'"/>
+ <xsl:template match="*">
+ <xsl:element name="samples">
+ <xsl:element name="sample">
+ <xsl:value-of select="$n1"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n2"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n3"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n4"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n5"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n6"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n7"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n8"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n9"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n10"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n11"/>
+ </xsl:element>
+ <xsl:element name="sample">
+ <xsl:value-of select="$n12"/>
+ </xsl:element>
+ </xsl:element>
+ </xsl:template>
+</xsl:stylesheet>$$::text, 'n1="v1",n2="v2",n3="v3",n4="v4",n5="v5",n6="v6",n7="v7",n8="v8",n9="v9",n10="v10",n11="v11",n12="v12"'::text);
+
+-- possible security exploit
+SELECT xslt_process('<xml><foo>Hello from XML</foo></xml>',
+$$<xsl:stylesheet version="1.0"
+ xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ xmlns:sax="http://icl.com/saxon"
+ extension-element-prefixes="sax">
+
+ <xsl:template match="//foo">
+ <sax:output href="0wn3d.txt" method="text">
+ <xsl:value-of select="'0wn3d via xml2 extension and libxslt'"/>
+ <xsl:apply-templates/>
+ </sax:output>
+ </xsl:template>
+</xsl:stylesheet>$$);
diff --git a/contrib/xml2/xml2--1.0--1.1.sql b/contrib/xml2/xml2--1.0--1.1.sql
new file mode 100644
index 0000000..350afb0
--- /dev/null
+++ b/contrib/xml2/xml2--1.0--1.1.sql
@@ -0,0 +1,18 @@
+/* contrib/xml2/xml2--1.0--1.1.sql */
+
+-- complain if script is sourced in psql, rather than via ALTER EXTENSION
+\echo Use "ALTER EXTENSION xml2 UPDATE TO '1.1'" to load this file. \quit
+
+ALTER FUNCTION xml_valid(text) PARALLEL SAFE;
+ALTER FUNCTION xml_encode_special_chars(text) PARALLEL SAFE;
+ALTER FUNCTION xpath_string(text, text) PARALLEL SAFE;
+ALTER FUNCTION xpath_nodeset(text, text, text, text) PARALLEL SAFE;
+ALTER FUNCTION xpath_number(text, text) PARALLEL SAFE;
+ALTER FUNCTION xpath_bool(text, text) PARALLEL SAFE;
+ALTER FUNCTION xpath_list(text, text, text) PARALLEL SAFE;
+ALTER FUNCTION xpath_list(text, text) PARALLEL SAFE;
+ALTER FUNCTION xpath_nodeset(text, text) PARALLEL SAFE;
+ALTER FUNCTION xpath_nodeset(text, text, text) PARALLEL SAFE;
+ALTER FUNCTION xpath_table(text, text, text, text, text) PARALLEL SAFE;
+ALTER FUNCTION xslt_process(text, text, text) PARALLEL SAFE;
+ALTER FUNCTION xslt_process(text, text) PARALLEL SAFE;
diff --git a/contrib/xml2/xml2--1.1.sql b/contrib/xml2/xml2--1.1.sql
new file mode 100644
index 0000000..671372c
--- /dev/null
+++ b/contrib/xml2/xml2--1.1.sql
@@ -0,0 +1,73 @@
+/* contrib/xml2/xml2--1.1.sql */
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION xml2" to load this file. \quit
+
+--SQL for XML parser
+
+-- deprecated old name for xml_is_well_formed
+CREATE FUNCTION xml_valid(text) RETURNS bool
+AS 'xml_is_well_formed'
+LANGUAGE INTERNAL STRICT STABLE PARALLEL SAFE;
+
+CREATE FUNCTION xml_encode_special_chars(text) RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT IMMUTABLE PARALLEL SAFE;
+
+CREATE FUNCTION xpath_string(text,text) RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT IMMUTABLE PARALLEL SAFE;
+
+CREATE FUNCTION xpath_nodeset(text,text,text,text) RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT IMMUTABLE PARALLEL SAFE;
+
+CREATE FUNCTION xpath_number(text,text) RETURNS float4
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT IMMUTABLE PARALLEL SAFE;
+
+CREATE FUNCTION xpath_bool(text,text) RETURNS boolean
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT IMMUTABLE PARALLEL SAFE;
+
+-- List function
+
+CREATE FUNCTION xpath_list(text,text,text) RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT IMMUTABLE PARALLEL SAFE;
+
+CREATE FUNCTION xpath_list(text,text) RETURNS text
+AS 'SELECT xpath_list($1,$2,'','')'
+LANGUAGE SQL STRICT IMMUTABLE PARALLEL SAFE;
+
+-- Wrapper functions for nodeset where no tags needed
+
+CREATE FUNCTION xpath_nodeset(text,text)
+RETURNS text
+AS 'SELECT xpath_nodeset($1,$2,'''','''')'
+LANGUAGE SQL STRICT IMMUTABLE PARALLEL SAFE;
+
+CREATE FUNCTION xpath_nodeset(text,text,text)
+RETURNS text
+AS 'SELECT xpath_nodeset($1,$2,'''',$3)'
+LANGUAGE SQL STRICT IMMUTABLE PARALLEL SAFE;
+
+-- Table function
+
+CREATE FUNCTION xpath_table(text,text,text,text,text)
+RETURNS setof record
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT STABLE PARALLEL SAFE;
+
+-- XSLT functions
+
+CREATE FUNCTION xslt_process(text,text,text)
+RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT VOLATILE PARALLEL SAFE;
+
+-- the function checks for the correct argument count
+CREATE FUNCTION xslt_process(text,text)
+RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT IMMUTABLE PARALLEL SAFE;
diff --git a/contrib/xml2/xml2.control b/contrib/xml2/xml2.control
new file mode 100644
index 0000000..ba2c059
--- /dev/null
+++ b/contrib/xml2/xml2.control
@@ -0,0 +1,6 @@
+# xml2 extension
+comment = 'XPath querying and XSLT'
+default_version = '1.1'
+module_pathname = '$libdir/pgxml'
+# XXX do we still need this to be non-relocatable?
+relocatable = false
diff --git a/contrib/xml2/xpath.c b/contrib/xml2/xpath.c
new file mode 100644
index 0000000..1e5b71d
--- /dev/null
+++ b/contrib/xml2/xpath.c
@@ -0,0 +1,845 @@
+/*
+ * contrib/xml2/xpath.c
+ *
+ * Parser interface for DOM-based parser (libxml) rather than
+ * stream-based SAX-type parser
+ */
+#include "postgres.h"
+
+#include "access/htup_details.h"
+#include "executor/spi.h"
+#include "fmgr.h"
+#include "funcapi.h"
+#include "lib/stringinfo.h"
+#include "miscadmin.h"
+#include "utils/builtins.h"
+#include "utils/xml.h"
+
+/* libxml includes */
+
+#include <libxml/xpath.h>
+#include <libxml/tree.h>
+#include <libxml/xmlmemory.h>
+#include <libxml/xmlerror.h>
+#include <libxml/parserInternals.h>
+
+PG_MODULE_MAGIC;
+
+/* exported for use by xslt_proc.c */
+
+PgXmlErrorContext *pgxml_parser_init(PgXmlStrictness strictness);
+
+/* workspace for pgxml_xpath() */
+
+typedef struct
+{
+ xmlDocPtr doctree;
+ xmlXPathContextPtr ctxt;
+ xmlXPathObjectPtr res;
+} xpath_workspace;
+
+/* local declarations */
+
+static xmlChar *pgxmlNodeSetToText(xmlNodeSetPtr nodeset,
+ xmlChar *toptagname, xmlChar *septagname,
+ xmlChar *plainsep);
+
+static text *pgxml_result_to_text(xmlXPathObjectPtr res, xmlChar *toptag,
+ xmlChar *septag, xmlChar *plainsep);
+
+static xmlChar *pgxml_texttoxmlchar(text *textstring);
+
+static xmlXPathObjectPtr pgxml_xpath(text *document, xmlChar *xpath,
+ xpath_workspace *workspace);
+
+static void cleanup_workspace(xpath_workspace *workspace);
+
+
+/*
+ * Initialize for xml parsing.
+ *
+ * As with the underlying pg_xml_init function, calls to this MUST be followed
+ * by a PG_TRY block that guarantees that pg_xml_done is called.
+ */
+PgXmlErrorContext *
+pgxml_parser_init(PgXmlStrictness strictness)
+{
+ PgXmlErrorContext *xmlerrcxt;
+
+ /* Set up error handling (we share the core's error handler) */
+ xmlerrcxt = pg_xml_init(strictness);
+
+ /* Note: we're assuming an elog cannot be thrown by the following calls */
+
+ /* Initialize libxml */
+ xmlInitParser();
+
+ xmlSubstituteEntitiesDefault(1);
+ xmlLoadExtDtdDefaultValue = 1;
+
+ return xmlerrcxt;
+}
+
+
+/*
+ * Returns true if document is well-formed
+ *
+ * Note: this has been superseded by a core function. We still have to
+ * have it in the contrib module so that existing SQL-level references
+ * to the function won't fail; but in normal usage with up-to-date SQL
+ * definitions for the contrib module, this won't be called.
+ */
+
+PG_FUNCTION_INFO_V1(xml_is_well_formed);
+
+Datum
+xml_is_well_formed(PG_FUNCTION_ARGS)
+{
+ text *t = PG_GETARG_TEXT_PP(0); /* document buffer */
+ bool result = false;
+ int32 docsize = VARSIZE_ANY_EXHDR(t);
+ xmlDocPtr doctree;
+ PgXmlErrorContext *xmlerrcxt;
+
+ xmlerrcxt = pgxml_parser_init(PG_XML_STRICTNESS_LEGACY);
+
+ PG_TRY();
+ {
+ doctree = xmlParseMemory((char *) VARDATA_ANY(t), docsize);
+
+ result = (doctree != NULL);
+
+ if (doctree != NULL)
+ xmlFreeDoc(doctree);
+ }
+ PG_CATCH();
+ {
+ pg_xml_done(xmlerrcxt, true);
+
+ PG_RE_THROW();
+ }
+ PG_END_TRY();
+
+ pg_xml_done(xmlerrcxt, false);
+
+ PG_RETURN_BOOL(result);
+}
+
+
+/* Encodes special characters (<, >, &, " and \r) as XML entities */
+
+PG_FUNCTION_INFO_V1(xml_encode_special_chars);
+
+Datum
+xml_encode_special_chars(PG_FUNCTION_ARGS)
+{
+ text *tin = PG_GETARG_TEXT_PP(0);
+ text *tout;
+ xmlChar *ts,
+ *tt;
+
+ ts = pgxml_texttoxmlchar(tin);
+
+ tt = xmlEncodeSpecialChars(NULL, ts);
+
+ pfree(ts);
+
+ tout = cstring_to_text((char *) tt);
+
+ xmlFree(tt);
+
+ PG_RETURN_TEXT_P(tout);
+}
+
+/*
+ * Function translates a nodeset into a text representation
+ *
+ * iterates over each node in the set and calls xmlNodeDump to write it to
+ * an xmlBuffer -from which an xmlChar * string is returned.
+ *
+ * each representation is surrounded by <tagname> ... </tagname>
+ *
+ * plainsep is an ordinary (not tag) separator - if used, then nodes are
+ * cast to string as output method
+ */
+static xmlChar *
+pgxmlNodeSetToText(xmlNodeSetPtr nodeset,
+ xmlChar *toptagname,
+ xmlChar *septagname,
+ xmlChar *plainsep)
+{
+ xmlBufferPtr buf;
+ xmlChar *result;
+ int i;
+
+ buf = xmlBufferCreate();
+
+ if ((toptagname != NULL) && (xmlStrlen(toptagname) > 0))
+ {
+ xmlBufferWriteChar(buf, "<");
+ xmlBufferWriteCHAR(buf, toptagname);
+ xmlBufferWriteChar(buf, ">");
+ }
+ if (nodeset != NULL)
+ {
+ for (i = 0; i < nodeset->nodeNr; i++)
+ {
+ if (plainsep != NULL)
+ {
+ xmlBufferWriteCHAR(buf,
+ xmlXPathCastNodeToString(nodeset->nodeTab[i]));
+
+ /* If this isn't the last entry, write the plain sep. */
+ if (i < (nodeset->nodeNr) - 1)
+ xmlBufferWriteChar(buf, (char *) plainsep);
+ }
+ else
+ {
+ if ((septagname != NULL) && (xmlStrlen(septagname) > 0))
+ {
+ xmlBufferWriteChar(buf, "<");
+ xmlBufferWriteCHAR(buf, septagname);
+ xmlBufferWriteChar(buf, ">");
+ }
+ xmlNodeDump(buf,
+ nodeset->nodeTab[i]->doc,
+ nodeset->nodeTab[i],
+ 1, 0);
+
+ if ((septagname != NULL) && (xmlStrlen(septagname) > 0))
+ {
+ xmlBufferWriteChar(buf, "</");
+ xmlBufferWriteCHAR(buf, septagname);
+ xmlBufferWriteChar(buf, ">");
+ }
+ }
+ }
+ }
+
+ if ((toptagname != NULL) && (xmlStrlen(toptagname) > 0))
+ {
+ xmlBufferWriteChar(buf, "</");
+ xmlBufferWriteCHAR(buf, toptagname);
+ xmlBufferWriteChar(buf, ">");
+ }
+ result = xmlStrdup(buf->content);
+ xmlBufferFree(buf);
+ return result;
+}
+
+
+/* Translate a PostgreSQL "varlena" -i.e. a variable length parameter
+ * into the libxml2 representation
+ */
+static xmlChar *
+pgxml_texttoxmlchar(text *textstring)
+{
+ return (xmlChar *) text_to_cstring(textstring);
+}
+
+/* Publicly visible XPath functions */
+
+/*
+ * This is a "raw" xpath function. Check that it returns child elements
+ * properly
+ */
+PG_FUNCTION_INFO_V1(xpath_nodeset);
+
+Datum
+xpath_nodeset(PG_FUNCTION_ARGS)
+{
+ text *document = PG_GETARG_TEXT_PP(0);
+ text *xpathsupp = PG_GETARG_TEXT_PP(1); /* XPath expression */
+ xmlChar *toptag = pgxml_texttoxmlchar(PG_GETARG_TEXT_PP(2));
+ xmlChar *septag = pgxml_texttoxmlchar(PG_GETARG_TEXT_PP(3));
+ xmlChar *xpath;
+ text *xpres;
+ xmlXPathObjectPtr res;
+ xpath_workspace workspace;
+
+ xpath = pgxml_texttoxmlchar(xpathsupp);
+
+ res = pgxml_xpath(document, xpath, &workspace);
+
+ xpres = pgxml_result_to_text(res, toptag, septag, NULL);
+
+ cleanup_workspace(&workspace);
+
+ pfree(xpath);
+
+ if (xpres == NULL)
+ PG_RETURN_NULL();
+ PG_RETURN_TEXT_P(xpres);
+}
+
+/*
+ * The following function is almost identical, but returns the elements in
+ * a list.
+ */
+PG_FUNCTION_INFO_V1(xpath_list);
+
+Datum
+xpath_list(PG_FUNCTION_ARGS)
+{
+ text *document = PG_GETARG_TEXT_PP(0);
+ text *xpathsupp = PG_GETARG_TEXT_PP(1); /* XPath expression */
+ xmlChar *plainsep = pgxml_texttoxmlchar(PG_GETARG_TEXT_PP(2));
+ xmlChar *xpath;
+ text *xpres;
+ xmlXPathObjectPtr res;
+ xpath_workspace workspace;
+
+ xpath = pgxml_texttoxmlchar(xpathsupp);
+
+ res = pgxml_xpath(document, xpath, &workspace);
+
+ xpres = pgxml_result_to_text(res, NULL, NULL, plainsep);
+
+ cleanup_workspace(&workspace);
+
+ pfree(xpath);
+
+ if (xpres == NULL)
+ PG_RETURN_NULL();
+ PG_RETURN_TEXT_P(xpres);
+}
+
+
+PG_FUNCTION_INFO_V1(xpath_string);
+
+Datum
+xpath_string(PG_FUNCTION_ARGS)
+{
+ text *document = PG_GETARG_TEXT_PP(0);
+ text *xpathsupp = PG_GETARG_TEXT_PP(1); /* XPath expression */
+ xmlChar *xpath;
+ int32 pathsize;
+ text *xpres;
+ xmlXPathObjectPtr res;
+ xpath_workspace workspace;
+
+ pathsize = VARSIZE_ANY_EXHDR(xpathsupp);
+
+ /*
+ * We encapsulate the supplied path with "string()" = 8 chars + 1 for NUL
+ * at end
+ */
+ /* We could try casting to string using the libxml function? */
+
+ xpath = (xmlChar *) palloc(pathsize + 9);
+ memcpy((char *) xpath, "string(", 7);
+ memcpy((char *) (xpath + 7), VARDATA_ANY(xpathsupp), pathsize);
+ xpath[pathsize + 7] = ')';
+ xpath[pathsize + 8] = '\0';
+
+ res = pgxml_xpath(document, xpath, &workspace);
+
+ xpres = pgxml_result_to_text(res, NULL, NULL, NULL);
+
+ cleanup_workspace(&workspace);
+
+ pfree(xpath);
+
+ if (xpres == NULL)
+ PG_RETURN_NULL();
+ PG_RETURN_TEXT_P(xpres);
+}
+
+
+PG_FUNCTION_INFO_V1(xpath_number);
+
+Datum
+xpath_number(PG_FUNCTION_ARGS)
+{
+ text *document = PG_GETARG_TEXT_PP(0);
+ text *xpathsupp = PG_GETARG_TEXT_PP(1); /* XPath expression */
+ xmlChar *xpath;
+ float4 fRes;
+ xmlXPathObjectPtr res;
+ xpath_workspace workspace;
+
+ xpath = pgxml_texttoxmlchar(xpathsupp);
+
+ res = pgxml_xpath(document, xpath, &workspace);
+
+ pfree(xpath);
+
+ if (res == NULL)
+ PG_RETURN_NULL();
+
+ fRes = xmlXPathCastToNumber(res);
+
+ cleanup_workspace(&workspace);
+
+ if (xmlXPathIsNaN(fRes))
+ PG_RETURN_NULL();
+
+ PG_RETURN_FLOAT4(fRes);
+}
+
+
+PG_FUNCTION_INFO_V1(xpath_bool);
+
+Datum
+xpath_bool(PG_FUNCTION_ARGS)
+{
+ text *document = PG_GETARG_TEXT_PP(0);
+ text *xpathsupp = PG_GETARG_TEXT_PP(1); /* XPath expression */
+ xmlChar *xpath;
+ int bRes;
+ xmlXPathObjectPtr res;
+ xpath_workspace workspace;
+
+ xpath = pgxml_texttoxmlchar(xpathsupp);
+
+ res = pgxml_xpath(document, xpath, &workspace);
+
+ pfree(xpath);
+
+ if (res == NULL)
+ PG_RETURN_BOOL(false);
+
+ bRes = xmlXPathCastToBoolean(res);
+
+ cleanup_workspace(&workspace);
+
+ PG_RETURN_BOOL(bRes);
+}
+
+
+
+/* Core function to evaluate XPath query */
+
+static xmlXPathObjectPtr
+pgxml_xpath(text *document, xmlChar *xpath, xpath_workspace *workspace)
+{
+ int32 docsize = VARSIZE_ANY_EXHDR(document);
+ PgXmlErrorContext *xmlerrcxt;
+ xmlXPathCompExprPtr comppath;
+
+ workspace->doctree = NULL;
+ workspace->ctxt = NULL;
+ workspace->res = NULL;
+
+ xmlerrcxt = pgxml_parser_init(PG_XML_STRICTNESS_LEGACY);
+
+ PG_TRY();
+ {
+ workspace->doctree = xmlParseMemory((char *) VARDATA_ANY(document),
+ docsize);
+ if (workspace->doctree != NULL)
+ {
+ workspace->ctxt = xmlXPathNewContext(workspace->doctree);
+ workspace->ctxt->node = xmlDocGetRootElement(workspace->doctree);
+
+ /* compile the path */
+ comppath = xmlXPathCompile(xpath);
+ if (comppath == NULL)
+ xml_ereport(xmlerrcxt, ERROR, ERRCODE_EXTERNAL_ROUTINE_EXCEPTION,
+ "XPath Syntax Error");
+
+ /* Now evaluate the path expression. */
+ workspace->res = xmlXPathCompiledEval(comppath, workspace->ctxt);
+
+ xmlXPathFreeCompExpr(comppath);
+ }
+ }
+ PG_CATCH();
+ {
+ cleanup_workspace(workspace);
+
+ pg_xml_done(xmlerrcxt, true);
+
+ PG_RE_THROW();
+ }
+ PG_END_TRY();
+
+ if (workspace->res == NULL)
+ cleanup_workspace(workspace);
+
+ pg_xml_done(xmlerrcxt, false);
+
+ return workspace->res;
+}
+
+/* Clean up after processing the result of pgxml_xpath() */
+static void
+cleanup_workspace(xpath_workspace *workspace)
+{
+ if (workspace->res)
+ xmlXPathFreeObject(workspace->res);
+ workspace->res = NULL;
+ if (workspace->ctxt)
+ xmlXPathFreeContext(workspace->ctxt);
+ workspace->ctxt = NULL;
+ if (workspace->doctree)
+ xmlFreeDoc(workspace->doctree);
+ workspace->doctree = NULL;
+}
+
+static text *
+pgxml_result_to_text(xmlXPathObjectPtr res,
+ xmlChar *toptag,
+ xmlChar *septag,
+ xmlChar *plainsep)
+{
+ xmlChar *xpresstr;
+ text *xpres;
+
+ if (res == NULL)
+ return NULL;
+
+ switch (res->type)
+ {
+ case XPATH_NODESET:
+ xpresstr = pgxmlNodeSetToText(res->nodesetval,
+ toptag,
+ septag, plainsep);
+ break;
+
+ case XPATH_STRING:
+ xpresstr = xmlStrdup(res->stringval);
+ break;
+
+ default:
+ elog(NOTICE, "unsupported XQuery result: %d", res->type);
+ xpresstr = xmlStrdup((const xmlChar *) "<unsupported/>");
+ }
+
+ /* Now convert this result back to text */
+ xpres = cstring_to_text((char *) xpresstr);
+
+ /* Free various storage */
+ xmlFree(xpresstr);
+
+ return xpres;
+}
+
+/*
+ * xpath_table is a table function. It needs some tidying (as do the
+ * other functions here!
+ */
+PG_FUNCTION_INFO_V1(xpath_table);
+
+Datum
+xpath_table(PG_FUNCTION_ARGS)
+{
+ /* Function parameters */
+ char *pkeyfield = text_to_cstring(PG_GETARG_TEXT_PP(0));
+ char *xmlfield = text_to_cstring(PG_GETARG_TEXT_PP(1));
+ char *relname = text_to_cstring(PG_GETARG_TEXT_PP(2));
+ char *xpathset = text_to_cstring(PG_GETARG_TEXT_PP(3));
+ char *condition = text_to_cstring(PG_GETARG_TEXT_PP(4));
+
+ /* SPI (input tuple) support */
+ SPITupleTable *tuptable;
+ HeapTuple spi_tuple;
+ TupleDesc spi_tupdesc;
+
+ /* Output tuple (tuplestore) support */
+ Tuplestorestate *tupstore = NULL;
+ TupleDesc ret_tupdesc;
+ HeapTuple ret_tuple;
+
+ ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
+ AttInMetadata *attinmeta;
+ MemoryContext per_query_ctx;
+ MemoryContext oldcontext;
+
+ char **values;
+ xmlChar **xpaths;
+ char *pos;
+ const char *pathsep = "|";
+
+ int numpaths;
+ int ret;
+ uint64 proc;
+ int j;
+ int rownr; /* For issuing multiple rows from one original
+ * document */
+ bool had_values; /* To determine end of nodeset results */
+ StringInfoData query_buf;
+ PgXmlErrorContext *xmlerrcxt;
+ volatile xmlDocPtr doctree = NULL;
+
+ /* We only have a valid tuple description in table function mode */
+ if (rsinfo == NULL || !IsA(rsinfo, ReturnSetInfo))
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("set-valued function called in context that cannot accept a set")));
+ if (rsinfo->expectedDesc == NULL)
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("xpath_table must be called as a table function")));
+
+ /*
+ * We want to materialise because it means that we don't have to carry
+ * libxml2 parser state between invocations of this function
+ */
+ if (!(rsinfo->allowedModes & SFRM_Materialize))
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("xpath_table requires Materialize mode, but it is not "
+ "allowed in this context")));
+
+ /*
+ * The tuplestore must exist in a higher context than this function call
+ * (per_query_ctx is used)
+ */
+ per_query_ctx = rsinfo->econtext->ecxt_per_query_memory;
+ oldcontext = MemoryContextSwitchTo(per_query_ctx);
+
+ /*
+ * Create the tuplestore - work_mem is the max in-memory size before a
+ * file is created on disk to hold it.
+ */
+ tupstore =
+ tuplestore_begin_heap(rsinfo->allowedModes & SFRM_Materialize_Random,
+ false, work_mem);
+
+ MemoryContextSwitchTo(oldcontext);
+
+ /* get the requested return tuple description */
+ ret_tupdesc = CreateTupleDescCopy(rsinfo->expectedDesc);
+
+ /* must have at least one output column (for the pkey) */
+ if (ret_tupdesc->natts < 1)
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("xpath_table must have at least one output column")));
+
+ /*
+ * At the moment we assume that the returned attributes make sense for the
+ * XPath specified (i.e. we trust the caller). It's not fatal if they get
+ * it wrong - the input function for the column type will raise an error
+ * if the path result can't be converted into the correct binary
+ * representation.
+ */
+
+ attinmeta = TupleDescGetAttInMetadata(ret_tupdesc);
+
+ /* Set return mode and allocate value space. */
+ rsinfo->returnMode = SFRM_Materialize;
+ rsinfo->setDesc = ret_tupdesc;
+
+ values = (char **) palloc(ret_tupdesc->natts * sizeof(char *));
+ xpaths = (xmlChar **) palloc(ret_tupdesc->natts * sizeof(xmlChar *));
+
+ /*
+ * Split XPaths. xpathset is a writable CString.
+ *
+ * Note that we stop splitting once we've done all needed for tupdesc
+ */
+ numpaths = 0;
+ pos = xpathset;
+ while (numpaths < (ret_tupdesc->natts - 1))
+ {
+ xpaths[numpaths++] = (xmlChar *) pos;
+ pos = strstr(pos, pathsep);
+ if (pos != NULL)
+ {
+ *pos = '\0';
+ pos++;
+ }
+ else
+ break;
+ }
+
+ /* Now build query */
+ initStringInfo(&query_buf);
+
+ /* Build initial sql statement */
+ appendStringInfo(&query_buf, "SELECT %s, %s FROM %s WHERE %s",
+ pkeyfield,
+ xmlfield,
+ relname,
+ condition);
+
+ if ((ret = SPI_connect()) < 0)
+ elog(ERROR, "xpath_table: SPI_connect returned %d", ret);
+
+ if ((ret = SPI_exec(query_buf.data, 0)) != SPI_OK_SELECT)
+ elog(ERROR, "xpath_table: SPI execution failed for query %s",
+ query_buf.data);
+
+ proc = SPI_processed;
+ tuptable = SPI_tuptable;
+ spi_tupdesc = tuptable->tupdesc;
+
+ /* Switch out of SPI context */
+ MemoryContextSwitchTo(oldcontext);
+
+ /*
+ * Check that SPI returned correct result. If you put a comma into one of
+ * the function parameters, this will catch it when the SPI query returns
+ * e.g. 3 columns.
+ */
+ if (spi_tupdesc->natts != 2)
+ {
+ ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("expression returning multiple columns is not valid in parameter list"),
+ errdetail("Expected two columns in SPI result, got %d.", spi_tupdesc->natts)));
+ }
+
+ /*
+ * Setup the parser. This should happen after we are done evaluating the
+ * query, in case it calls functions that set up libxml differently.
+ */
+ xmlerrcxt = pgxml_parser_init(PG_XML_STRICTNESS_LEGACY);
+
+ PG_TRY();
+ {
+ /* For each row i.e. document returned from SPI */
+ uint64 i;
+
+ for (i = 0; i < proc; i++)
+ {
+ char *pkey;
+ char *xmldoc;
+ xmlXPathContextPtr ctxt;
+ xmlXPathObjectPtr res;
+ xmlChar *resstr;
+ xmlXPathCompExprPtr comppath;
+
+ /* Extract the row data as C Strings */
+ spi_tuple = tuptable->vals[i];
+ pkey = SPI_getvalue(spi_tuple, spi_tupdesc, 1);
+ xmldoc = SPI_getvalue(spi_tuple, spi_tupdesc, 2);
+
+ /*
+ * Clear the values array, so that not-well-formed documents
+ * return NULL in all columns. Note that this also means that
+ * spare columns will be NULL.
+ */
+ for (j = 0; j < ret_tupdesc->natts; j++)
+ values[j] = NULL;
+
+ /* Insert primary key */
+ values[0] = pkey;
+
+ /* Parse the document */
+ if (xmldoc)
+ doctree = xmlParseMemory(xmldoc, strlen(xmldoc));
+ else /* treat NULL as not well-formed */
+ doctree = NULL;
+
+ if (doctree == NULL)
+ {
+ /* not well-formed, so output all-NULL tuple */
+ ret_tuple = BuildTupleFromCStrings(attinmeta, values);
+ tuplestore_puttuple(tupstore, ret_tuple);
+ heap_freetuple(ret_tuple);
+ }
+ else
+ {
+ /* New loop here - we have to deal with nodeset results */
+ rownr = 0;
+
+ do
+ {
+ /* Now evaluate the set of xpaths. */
+ had_values = false;
+ for (j = 0; j < numpaths; j++)
+ {
+ ctxt = xmlXPathNewContext(doctree);
+ ctxt->node = xmlDocGetRootElement(doctree);
+
+ /* compile the path */
+ comppath = xmlXPathCompile(xpaths[j]);
+ if (comppath == NULL)
+ xml_ereport(xmlerrcxt, ERROR,
+ ERRCODE_EXTERNAL_ROUTINE_EXCEPTION,
+ "XPath Syntax Error");
+
+ /* Now evaluate the path expression. */
+ res = xmlXPathCompiledEval(comppath, ctxt);
+ xmlXPathFreeCompExpr(comppath);
+
+ if (res != NULL)
+ {
+ switch (res->type)
+ {
+ case XPATH_NODESET:
+ /* We see if this nodeset has enough nodes */
+ if (res->nodesetval != NULL &&
+ rownr < res->nodesetval->nodeNr)
+ {
+ resstr = xmlXPathCastNodeToString(res->nodesetval->nodeTab[rownr]);
+ had_values = true;
+ }
+ else
+ resstr = NULL;
+
+ break;
+
+ case XPATH_STRING:
+ resstr = xmlStrdup(res->stringval);
+ break;
+
+ default:
+ elog(NOTICE, "unsupported XQuery result: %d", res->type);
+ resstr = xmlStrdup((const xmlChar *) "<unsupported/>");
+ }
+
+ /*
+ * Insert this into the appropriate column in the
+ * result tuple.
+ */
+ values[j + 1] = (char *) resstr;
+ }
+ xmlXPathFreeContext(ctxt);
+ }
+
+ /* Now add the tuple to the output, if there is one. */
+ if (had_values)
+ {
+ ret_tuple = BuildTupleFromCStrings(attinmeta, values);
+ tuplestore_puttuple(tupstore, ret_tuple);
+ heap_freetuple(ret_tuple);
+ }
+
+ rownr++;
+ } while (had_values);
+ }
+
+ if (doctree != NULL)
+ xmlFreeDoc(doctree);
+ doctree = NULL;
+
+ if (pkey)
+ pfree(pkey);
+ if (xmldoc)
+ pfree(xmldoc);
+ }
+ }
+ PG_CATCH();
+ {
+ if (doctree != NULL)
+ xmlFreeDoc(doctree);
+
+ pg_xml_done(xmlerrcxt, true);
+
+ PG_RE_THROW();
+ }
+ PG_END_TRY();
+
+ if (doctree != NULL)
+ xmlFreeDoc(doctree);
+
+ pg_xml_done(xmlerrcxt, false);
+
+ tuplestore_donestoring(tupstore);
+
+ SPI_finish();
+
+ rsinfo->setResult = tupstore;
+
+ /*
+ * SFRM_Materialize mode expects us to return a NULL Datum. The actual
+ * tuples are in our tuplestore and passed back through rsinfo->setResult.
+ * rsinfo->setDesc is set to the tuple description that we actually used
+ * to build our tuples with, so the caller can verify we did what it was
+ * expecting.
+ */
+ return (Datum) 0;
+}
diff --git a/contrib/xml2/xslt_proc.c b/contrib/xml2/xslt_proc.c
new file mode 100644
index 0000000..2189bca
--- /dev/null
+++ b/contrib/xml2/xslt_proc.c
@@ -0,0 +1,256 @@
+/*
+ * contrib/xml2/xslt_proc.c
+ *
+ * XSLT processing functions (requiring libxslt)
+ *
+ * John Gray, for Torchbox 2003-04-01
+ */
+#include "postgres.h"
+
+#include "executor/spi.h"
+#include "fmgr.h"
+#include "funcapi.h"
+#include "miscadmin.h"
+#include "utils/builtins.h"
+#include "utils/xml.h"
+
+#ifdef USE_LIBXSLT
+
+/* libxml includes */
+
+#include <libxml/xpath.h>
+#include <libxml/tree.h>
+#include <libxml/xmlmemory.h>
+
+/* libxslt includes */
+
+#include <libxslt/xslt.h>
+#include <libxslt/xsltInternals.h>
+#include <libxslt/security.h>
+#include <libxslt/transform.h>
+#include <libxslt/xsltutils.h>
+#endif /* USE_LIBXSLT */
+
+
+#ifdef USE_LIBXSLT
+
+/* declarations to come from xpath.c */
+extern PgXmlErrorContext *pgxml_parser_init(PgXmlStrictness strictness);
+
+/* local defs */
+static const char **parse_params(text *paramstr);
+#endif /* USE_LIBXSLT */
+
+
+PG_FUNCTION_INFO_V1(xslt_process);
+
+Datum
+xslt_process(PG_FUNCTION_ARGS)
+{
+#ifdef USE_LIBXSLT
+
+ text *doct = PG_GETARG_TEXT_PP(0);
+ text *ssheet = PG_GETARG_TEXT_PP(1);
+ text *result;
+ text *paramstr;
+ const char **params;
+ PgXmlErrorContext *xmlerrcxt;
+ volatile xsltStylesheetPtr stylesheet = NULL;
+ volatile xmlDocPtr doctree = NULL;
+ volatile xmlDocPtr restree = NULL;
+ volatile xsltSecurityPrefsPtr xslt_sec_prefs = NULL;
+ volatile xsltTransformContextPtr xslt_ctxt = NULL;
+ volatile int resstat = -1;
+ xmlChar *resstr = NULL;
+ int reslen = 0;
+
+ if (fcinfo->nargs == 3)
+ {
+ paramstr = PG_GETARG_TEXT_PP(2);
+ params = parse_params(paramstr);
+ }
+ else
+ {
+ /* No parameters */
+ params = (const char **) palloc(sizeof(char *));
+ params[0] = NULL;
+ }
+
+ /* Setup parser */
+ xmlerrcxt = pgxml_parser_init(PG_XML_STRICTNESS_LEGACY);
+
+ PG_TRY();
+ {
+ xmlDocPtr ssdoc;
+ bool xslt_sec_prefs_error;
+
+ /* Parse document */
+ doctree = xmlParseMemory((char *) VARDATA_ANY(doct),
+ VARSIZE_ANY_EXHDR(doct));
+
+ if (doctree == NULL)
+ xml_ereport(xmlerrcxt, ERROR, ERRCODE_EXTERNAL_ROUTINE_EXCEPTION,
+ "error parsing XML document");
+
+ /* Same for stylesheet */
+ ssdoc = xmlParseMemory((char *) VARDATA_ANY(ssheet),
+ VARSIZE_ANY_EXHDR(ssheet));
+
+ if (ssdoc == NULL)
+ xml_ereport(xmlerrcxt, ERROR, ERRCODE_EXTERNAL_ROUTINE_EXCEPTION,
+ "error parsing stylesheet as XML document");
+
+ /* After this call we need not free ssdoc separately */
+ stylesheet = xsltParseStylesheetDoc(ssdoc);
+
+ if (stylesheet == NULL)
+ xml_ereport(xmlerrcxt, ERROR, ERRCODE_EXTERNAL_ROUTINE_EXCEPTION,
+ "failed to parse stylesheet");
+
+ xslt_ctxt = xsltNewTransformContext(stylesheet, doctree);
+
+ xslt_sec_prefs_error = false;
+ if ((xslt_sec_prefs = xsltNewSecurityPrefs()) == NULL)
+ xslt_sec_prefs_error = true;
+
+ if (xsltSetSecurityPrefs(xslt_sec_prefs, XSLT_SECPREF_READ_FILE,
+ xsltSecurityForbid) != 0)
+ xslt_sec_prefs_error = true;
+ if (xsltSetSecurityPrefs(xslt_sec_prefs, XSLT_SECPREF_WRITE_FILE,
+ xsltSecurityForbid) != 0)
+ xslt_sec_prefs_error = true;
+ if (xsltSetSecurityPrefs(xslt_sec_prefs, XSLT_SECPREF_CREATE_DIRECTORY,
+ xsltSecurityForbid) != 0)
+ xslt_sec_prefs_error = true;
+ if (xsltSetSecurityPrefs(xslt_sec_prefs, XSLT_SECPREF_READ_NETWORK,
+ xsltSecurityForbid) != 0)
+ xslt_sec_prefs_error = true;
+ if (xsltSetSecurityPrefs(xslt_sec_prefs, XSLT_SECPREF_WRITE_NETWORK,
+ xsltSecurityForbid) != 0)
+ xslt_sec_prefs_error = true;
+ if (xsltSetCtxtSecurityPrefs(xslt_sec_prefs, xslt_ctxt) != 0)
+ xslt_sec_prefs_error = true;
+
+ if (xslt_sec_prefs_error)
+ ereport(ERROR,
+ (errmsg("could not set libxslt security preferences")));
+
+ restree = xsltApplyStylesheetUser(stylesheet, doctree, params,
+ NULL, NULL, xslt_ctxt);
+
+ if (restree == NULL)
+ xml_ereport(xmlerrcxt, ERROR, ERRCODE_EXTERNAL_ROUTINE_EXCEPTION,
+ "failed to apply stylesheet");
+
+ resstat = xsltSaveResultToString(&resstr, &reslen, restree, stylesheet);
+ }
+ PG_CATCH();
+ {
+ if (restree != NULL)
+ xmlFreeDoc(restree);
+ if (xslt_ctxt != NULL)
+ xsltFreeTransformContext(xslt_ctxt);
+ if (xslt_sec_prefs != NULL)
+ xsltFreeSecurityPrefs(xslt_sec_prefs);
+ if (stylesheet != NULL)
+ xsltFreeStylesheet(stylesheet);
+ if (doctree != NULL)
+ xmlFreeDoc(doctree);
+ xsltCleanupGlobals();
+
+ pg_xml_done(xmlerrcxt, true);
+
+ PG_RE_THROW();
+ }
+ PG_END_TRY();
+
+ xmlFreeDoc(restree);
+ xsltFreeTransformContext(xslt_ctxt);
+ xsltFreeSecurityPrefs(xslt_sec_prefs);
+ xsltFreeStylesheet(stylesheet);
+ xmlFreeDoc(doctree);
+ xsltCleanupGlobals();
+
+ pg_xml_done(xmlerrcxt, false);
+
+ /* XXX this is pretty dubious, really ought to throw error instead */
+ if (resstat < 0)
+ PG_RETURN_NULL();
+
+ result = cstring_to_text_with_len((char *) resstr, reslen);
+
+ if (resstr)
+ xmlFree(resstr);
+
+ PG_RETURN_TEXT_P(result);
+#else /* !USE_LIBXSLT */
+
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("xslt_process() is not available without libxslt")));
+ PG_RETURN_NULL();
+#endif /* USE_LIBXSLT */
+}
+
+#ifdef USE_LIBXSLT
+
+static const char **
+parse_params(text *paramstr)
+{
+ char *pos;
+ char *pstr;
+ char *nvsep = "=";
+ char *itsep = ",";
+ const char **params;
+ int max_params;
+ int nparams;
+
+ pstr = text_to_cstring(paramstr);
+
+ max_params = 20; /* must be even! */
+ params = (const char **) palloc((max_params + 1) * sizeof(char *));
+ nparams = 0;
+
+ pos = pstr;
+
+ while (*pos != '\0')
+ {
+ if (nparams >= max_params)
+ {
+ max_params *= 2;
+ params = (const char **) repalloc(params,
+ (max_params + 1) * sizeof(char *));
+ }
+ params[nparams++] = pos;
+ pos = strstr(pos, nvsep);
+ if (pos != NULL)
+ {
+ *pos = '\0';
+ pos++;
+ }
+ else
+ {
+ /* No equal sign, so ignore this "parameter" */
+ nparams--;
+ break;
+ }
+
+ /* since max_params is even, we still have nparams < max_params */
+ params[nparams++] = pos;
+ pos = strstr(pos, itsep);
+ if (pos != NULL)
+ {
+ *pos = '\0';
+ pos++;
+ }
+ else
+ break;
+ }
+
+ /* Add the terminator marker; we left room for it in the palloc's */
+ params[nparams] = NULL;
+
+ return params;
+}
+
+#endif /* USE_LIBXSLT */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 21:57:06 +0000