From 960382e3e991f774d0ef92eb82dd7ef641f74108 Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Tue, 31 Mar 2026 11:49:54 -0400
Subject: [PATCH] Doc: remove bogus claim that tsvectors can have up to 2^64
 entries.

This is nonsense on its face, since the textsearch parsing logic
generally uses int32 to count words (see, eg, struct ParsedText).
Not to mention that we don't support input strings larger than
1GB.

The actual limitation of interest is documented nearby: a tsvector
can't be larger than 1MB, thanks to 20-bit offset fields within it
(see WordEntry.pos).  That constrains us to well under 256K lexemes
per tsvector, depending on how many positions are stored per lexeme.

It seems sufficient therefore to just remove the bit about number
of lexemes.

Author: Dharin Shah <dharinshah95@gmail.com>
Discussion: https://postgr.es/m/CAOj6k6d0YO6AO-bhxkfUXPxUi-+YX9-doh2h5D5z0Bm8D2w=OA@mail.gmail.com
---
 doc/src/sgml/textsearch.sgml | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/doc/src/sgml/textsearch.sgml b/doc/src/sgml/textsearch.sgml
index e68d43227d7..d6d2ddeaacc 100644
--- a/doc/src/sgml/textsearch.sgml
+++ b/doc/src/sgml/textsearch.sgml
@@ -4049,11 +4049,6 @@ Parser: "pg_catalog.default"
      <para>The length of a <type>tsvector</type> (lexemes + positions) must be
      less than 1 megabyte</para>
     </listitem>
-    <listitem>
-     <!-- TODO: number of lexemes in what?  This is unclear -->
-     <para>The number of lexemes must be less than
-     2<superscript>64</superscript></para>
-    </listitem>
     <listitem>
      <para>Position values in <type>tsvector</type> must be greater than 0 and
      no more than 16,383</para>