pgxml.sql

PostgreSQL 8.2中增加了很多企业用户所需要的功能和性能上的提高,其开发团队说,该版本将加速更多企业向该数据库移植.核心开发成员之一Bruce Momjian表示,在新版PostgreSQL

--SQL for XML parser

CREATE OR REPLACE FUNCTION xml_is_well_formed(text) RETURNS bool
	AS '$libdir/pgxml' LANGUAGE C STRICT IMMUTABLE;

-- deprecated old name for xml_is_well_formed
CREATE OR REPLACE FUNCTION xml_valid(text) RETURNS bool
	AS '$libdir/pgxml', 'xml_is_well_formed' LANGUAGE C STRICT IMMUTABLE;

CREATE OR REPLACE FUNCTION xml_encode_special_chars(text) RETURNS text
	AS '$libdir/pgxml' LANGUAGE C STRICT IMMUTABLE;

CREATE OR REPLACE FUNCTION xpath_string(text,text) RETURNS text
	AS '$libdir/pgxml' LANGUAGE C STRICT IMMUTABLE;

CREATE OR REPLACE FUNCTION xpath_nodeset(text,text,text,text) RETURNS text
	AS '$libdir/pgxml' LANGUAGE C STRICT IMMUTABLE;

CREATE OR REPLACE FUNCTION xpath_number(text,text) RETURNS float4
	AS '$libdir/pgxml' LANGUAGE C STRICT IMMUTABLE;

CREATE OR REPLACE FUNCTION xpath_bool(text,text) RETURNS boolean
	AS '$libdir/pgxml' LANGUAGE C STRICT IMMUTABLE;

-- List function

CREATE OR REPLACE FUNCTION xpath_list(text,text,text) RETURNS text
	AS '$libdir/pgxml'
	LANGUAGE C STRICT IMMUTABLE;


CREATE OR REPLACE FUNCTION xpath_list(text,text) RETURNS text 
AS 'SELECT xpath_list($1,$2,'','')' LANGUAGE SQL STRICT IMMUTABLE;



-- Wrapper functions for nodeset where no tags needed


CREATE OR REPLACE FUNCTION xpath_nodeset(text,text) RETURNS text AS
'SELECT xpath_nodeset($1,$2,'''','''')' LANGUAGE SQL STRICT IMMUTABLE;


CREATE OR REPLACE FUNCTION xpath_nodeset(text,text,text) RETURNS text AS
'SELECT xpath_nodeset($1,$2,'''',$3)' LANGUAGE SQL STRICT IMMUTABLE;

-- Table function

CREATE OR REPLACE FUNCTION xpath_table(text,text,text,text,text) RETURNS setof record
	AS '$libdir/pgxml'
	LANGUAGE C STRICT STABLE;

-- XSLT functions
-- Delete from here to the end of the file if you are not compiling with
-- XSLT support.


CREATE OR REPLACE FUNCTION xslt_process(text,text,text) RETURNS text 
	AS '$libdir/pgxml' LANGUAGE C STRICT VOLATILE;

-- the function checks for the correct argument count

CREATE OR REPLACE FUNCTION xslt_process(text,text) RETURNS text 
	AS '$libdir/pgxml' LANGUAGE C STRICT IMMUTABLE;