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Commit1fe9e38

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Clarify documentation for the initcap function
This commit documents differences in the definition of word separators forthe initcap function between libc and ICU locale providers.Backpatch to all supported branches.Discussion:https://postgr.es/m/804cc10ef95d4d3b298e76b181fd9437%40postgrespro.ruAuthor: Oleg Tselebrovskiy <o.tselebrovskiy@postgrespro.ru>Backpatch-through: 13
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‎doc/src/sgml/func.sgml‎

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@@ -3148,8 +3148,11 @@ SELECT NOT(ROW(table.*) IS NOT NULL) FROM TABLE; -- detect at least one null in
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</para>
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<para>
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Converts the first letter of each word to upper case and the
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rest to lower case. Words are sequences of alphanumeric
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characters separated by non-alphanumeric characters.
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rest to lower case. When using the <literal>libc</literal> locale
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provider, words are sequences of alphanumeric characters separated
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by non-alphanumeric characters; when using the ICU locale provider,
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words are separated according to
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<ulink url="https://www.unicode.org/reports/tr29/#Word_Boundaries">Unicode Standard Annex #29</ulink>.
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</para>
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<para>
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<literal>initcap('hi THOMAS')</literal>

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