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Green_GoodERP18_FSJ_Standard/PostgreSQL/doc/postgresql/html/sql-createtsparser.html

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  1. <?xml version="1.0" encoding="UTF-8" standalone="no"?>

  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 V1.79.1" /><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><div xmlns="http://www.w3.org/TR/xhtml1/transitional" 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 12.4 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></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> ]

  9. )

  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.

  17.   </p><p>

  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.

  20.   </p><p>

  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.)

  24.   </p><p>

  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

  28.       schema-qualified.

  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.

  45.   </p><p>

  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>

  48.    There is no

  49.    <code class="command">CREATE TEXT SEARCH PARSER</code> statement in the SQL

  50.    standard.

  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">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sql-commands.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sql-createtstemplate.html">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">Home</a></td><td width="40%" align="right" valign="top"> CREATE TEXT SEARCH TEMPLATE</td></tr></table></div></body></html>
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