Fix contrib/xml2 so regression test still works when it's built without libxslt.

This involves modifying the module to have a stable ABI, that is, the
xslt_process() function still exists even without libxslt.  It throws a
runtime error if called, but doesn't prevent executing the CREATE FUNCTION
call.  This is a good thing anyway to simplify cross-version upgrades.

1 files changed, 109 insertions, 0 deletions

diff --git a/contrib/xml2/expected/xml2_1.out b/contrib/xml2/expected/xml2_1.out
new file mode 100644
index 0000000000..083fc3b2ca
--- /dev/null
+++ b/contrib/xml2/expected/xml2_1.out
@@ -0,0 +1,109 @@
+--
+-- first, define the functions.  Turn off echoing so that expected file
+-- does not depend on contents of pgxml.sql.
+--
+SET client_min_messages = warning;
+\set ECHO none
+RESET client_min_messages;
+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));