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2 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>CREATE TEXT SEARCH PARSER</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="sql-createtsdictionary.html" title="CREATE TEXT SEARCH DICTIONARY" /><link rel="next" href="sql-createtstemplate.html" title="CREATE TEXT SEARCH TEMPLATE" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">CREATE TEXT SEARCH PARSER</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="sql-createtsdictionary.html" title="CREATE TEXT SEARCH DICTIONARY">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="sql-commands.html" title="SQL Commands">Up</a></td><th width="60%" align="center">SQL Commands</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 18.0 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="sql-createtstemplate.html" title="CREATE TEXT SEARCH TEMPLATE">Next</a></td></tr></table><hr /></div><div class="refentry" id="SQL-CREATETSPARSER"><div class="titlepage"></div><a id="id-1.9.3.90.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">CREATE TEXT SEARCH PARSER</span></h2><p>CREATE TEXT SEARCH PARSER — define a new text search parser</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">
3 CREATE TEXT SEARCH PARSER <em class="replaceable"><code>name</code></em> (
4 START = <em class="replaceable"><code>start_function</code></em> ,
5 GETTOKEN = <em class="replaceable"><code>gettoken_function</code></em> ,
6 END = <em class="replaceable"><code>end_function</code></em> ,
7 LEXTYPES = <em class="replaceable"><code>lextypes_function</code></em>
8 [, HEADLINE = <em class="replaceable"><code>headline_function</code></em> ]
10 </pre></div><div class="refsect1" id="id-1.9.3.90.5"><h2>Description</h2><p>
11 <code class="command">CREATE TEXT SEARCH PARSER</code> creates a new text search
12 parser. A text search parser defines a method for splitting a text
13 string into tokens and assigning types (categories) to the tokens.
14 A parser is not particularly useful by itself, but must be bound into a
15 text search configuration along with some text search dictionaries
16 to be used for searching.
18 If a schema name is given then the text search parser is created in the
19 specified schema. Otherwise it is created in the current schema.
21 You must be a superuser to use <code class="command">CREATE TEXT SEARCH PARSER</code>.
22 (This restriction is made because an erroneous text search parser
23 definition could confuse or even crash the server.)
25 Refer to <a class="xref" href="textsearch.html" title="Chapter 12. Full Text Search">Chapter 12</a> for further information.
26 </p></div><div class="refsect1" id="id-1.9.3.90.6"><h2>Parameters</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="replaceable"><code>name</code></em></span></dt><dd><p>
27 The name of the text search parser to be created. The name can be
29 </p></dd><dt><span class="term"><em class="replaceable"><code>start_function</code></em></span></dt><dd><p>
30 The name of the start function for the parser.
31 </p></dd><dt><span class="term"><em class="replaceable"><code>gettoken_function</code></em></span></dt><dd><p>
32 The name of the get-next-token function for the parser.
33 </p></dd><dt><span class="term"><em class="replaceable"><code>end_function</code></em></span></dt><dd><p>
34 The name of the end function for the parser.
35 </p></dd><dt><span class="term"><em class="replaceable"><code>lextypes_function</code></em></span></dt><dd><p>
36 The name of the lextypes function for the parser (a function that
37 returns information about the set of token types it produces).
38 </p></dd><dt><span class="term"><em class="replaceable"><code>headline_function</code></em></span></dt><dd><p>
39 The name of the headline function for the parser (a function that
40 summarizes a set of tokens).
41 </p></dd></dl></div><p>
42 The function names can be schema-qualified if necessary. Argument types
43 are not given, since the argument list for each type of function is
44 predetermined. All except the headline function are required.
46 The arguments can appear in any order, not only the one shown above.
47 </p></div><div class="refsect1" id="id-1.9.3.90.7"><h2>Compatibility</h2><p>
49 <code class="command">CREATE TEXT SEARCH PARSER</code> statement in the SQL
51 </p></div><div class="refsect1" id="id-1.9.3.90.8"><h2>See Also</h2><span class="simplelist"><a class="xref" href="sql-altertsparser.html" title="ALTER TEXT SEARCH PARSER"><span class="refentrytitle">ALTER TEXT SEARCH PARSER</span></a>, <a class="xref" href="sql-droptsparser.html" title="DROP TEXT SEARCH PARSER"><span class="refentrytitle">DROP TEXT SEARCH PARSER</span></a></span></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="sql-createtsdictionary.html" title="CREATE TEXT SEARCH DICTIONARY">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sql-commands.html" title="SQL Commands">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sql-createtstemplate.html" title="CREATE TEXT SEARCH TEMPLATE">Next</a></td></tr><tr><td width="40%" align="left" valign="top">CREATE TEXT SEARCH DICTIONARY </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 18.0 Documentation">Home</a></td><td width="40%" align="right" valign="top"> CREATE TEXT SEARCH TEMPLATE</td></tr></table></div></body></html>