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Fix missed case for builtin collation provider.

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A missed check for the builtin collation provider could result in
falling through to call isalpha().

This does not appear to have practical consequences because it only
happens for characters in the ASCII range. Regardless, the builtin
provider should not be calling libc functions, so backpatch.

Discussion: https://postgr.es/m/1bd5a0a5192f82c22ee7527e825b18ab0028b2c7.camel@j-davis.com
Backpatch-through: 17
This commit is contained in:
Jeff Davis 2024-10-11 16:57:48 -07:00
parent e839c8ecc9
commit 98c5b191e7
1 changed files with 2 additions and 4 deletions
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6
src/backend/utils/adt/like_support.c
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@ -1500,13 +1500,11 @@ pattern_char_isalpha(char c, bool is_multibyte,
return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
else if (is_multibyte && IS_HIGHBIT_SET(c))
return true;
else if (locale->provider == COLLPROVIDER_ICU)
else if (locale->provider != COLLPROVIDER_LIBC)
return IS_HIGHBIT_SET(c) ||
(c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
else if (locale->provider == COLLPROVIDER_LIBC)
return isalpha_l((unsigned char) c, locale->info.lt);
else
return isalpha((unsigned char) c);
return isalpha_l((unsigned char) c, locale->info.lt);
}