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doc: clarify handling of ts_headline() operators & extra words

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Reported-by: Ngigi Waithaka & Alex Malek

Bug: 15172

Discussion: https://postgr.es/m/152461454026.19805.6310947081647212894@wrigleys.postgresql.org

Backpatch-through: 16
pull/150/head
Bruce Momjian 2 years ago
parent 17d490ef32
commit f5b75be030
1 changed files with 4 additions and 1 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 5
      doc/src/sgml/textsearch.sgml

5
doc/src/sgml/textsearch.sgml
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@ -1287,7 +1287,10 @@ ts_headline(<optional> <replaceable class="parameter">config</replaceable> <type
<para> <para>
<function>ts_headline</function> accepts a document along <function>ts_headline</function> accepts a document along
with a query, and returns an excerpt from with a query, and returns an excerpt from
the document in which terms from the query are highlighted. The the document in which terms from the query are highlighted.
Specifically, the function will use the query to select relevant
text fragments, and then highlight all words that appear in the query,
even if those word positions do not match the query's restrictions. The
configuration to be used to parse the document can be specified by configuration to be used to parse the document can be specified by
<replaceable>config</replaceable>; if <replaceable>config</replaceable> <replaceable>config</replaceable>; if <replaceable>config</replaceable>
is omitted, the is omitted, the

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