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<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
-
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- project.
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- Copyright (C) 1998-2018 OpenLink Software
-
- This project is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; only version 2 of the License, dated June 1991.
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- WITHOUT ANY WARRANTY; without even the implied warranty of
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- 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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-->
<refentry id="fn_json_parse">
<refmeta>
<refentrytitle>json_parse</refentrytitle>
<refmiscinfo>ws</refmiscinfo>
</refmeta>
<refnamediv>
<refname>json_parse</refname>
<refpurpose>Takes json string and returns parse tree.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn_json_parse">
<funcprototype id="fproto_json_parse">
<funcdef>integer <function>json_parse</function></funcdef>
<paramdef>in <parameter>txt</parameter> varchar</paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc_json_parse">
<title>Description</title>
<para>This function takes json string and returns parse tree.</para>
</refsect1>
<refsect1 id="params_json_parse">
<title>Parameters</title>
<refsect2><title>txt</title>
<para>a json string</para></refsect2>
</refsect1>
<refsect1 id="ret_json_parse"><title>Return Types</title>
<para>The function returns tree.</para>
</refsect1>
<refsect1 id="examples_atoi"><title>Examples</title>
<example id="ex_atoi"><title>Simple example</title>
<programlisting><![CDATA[
SQL>create procedure json_tree_example ()
{
declare qr, url, cnt, tree, xt, hdr any;
cnt := '
{ "head": { "link": [], "vars": ["s", "p", "o"] },
"results": { "distinct": false, "ordered": true, "bindings": [
{ "s": { "type": "uri", "value": "http://example.org/node" } , "p": { "type": "uri", "value": "http://www.w3.org/1999/02/22-rdf-syntax-ns#type" } , "o": { "type": "uri", "value": "http://www.w3.org/1999/02/22-rdf-syntax-ns#type" }},
{ "s": { "type": "uri", "value": "http://example.org/node" } , "p": { "type": "uri", "value": "http://www.w3.org/1999/02/22-rdf-syntax-ns#type" } , "o": { "type": "uri", "value": "http://www.w3.org/1999/02/22-rdf-syntax-ns#type" }} ] } }';
tree := json_parse (cnt);
tree := get_keyword ('results', tree);
tree := get_keyword ('bindings', tree);
return tree[0][1];
}
;
Done.
SQL> SELECT json_tree_example();
json_tree_example
VARCHAR
structure
No. of rows in result: 1
]]></programlisting>
</example>
</refsect1>
<refsect1 id="seealso_json_parse">
<title>See Also</title>
<para>
<link linkend="fn_http"><function>http</function></link>,
<link linkend="fn_http_value"><function>http_value</function></link>,
<link linkend="fn_http_url"><function>http_url</function></link>,
<link linkend="fn_string_output"><function>string_output</function></link>,
<link linkend="fn_http_rewrite"><function>http_rewrite</function></link>,
</para>
</refsect1>
</refentry>
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