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Fix missed case for builtin collation provider.

A missed check for the builtin collation provider could result infalling through to call isalpha().This does not appear to have practical consequences because it onlyhappens for characters in the ASCII range. Regardless, the builtinprovider should not be calling libc functions, so backpatch.Discussion:https://postgr.es/m/1bd5a0a5192f82c22ee7527e825b18ab0028b2c7.camel@j-davis.comBackpatch-through: 17

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src/backend/utils/adt
- like_support.c

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`‎src/backend/utils/adt/like_support.c`

Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -1505,7 +1505,7 @@ pattern_char_isalpha(char c, bool is_multibyte,`
`1505`	`1505`	`return (c >='A'&&c <='Z')\|\| (c >='a'&&c <='z');`
`1506`	`1506`	`elseif (is_multibyte&&IS_HIGHBIT_SET(c))`
`1507`	`1507`	`return true;`
`1508`		`-elseif (locale&&locale->provider==COLLPROVIDER_ICU)`
	`1508`	`+elseif (locale&&locale->provider!=COLLPROVIDER_LIBC)`
`1509`	`1509`	`returnIS_HIGHBIT_SET(c)\|\|`
`1510`	`1510`	`(c >='A'&&c <='Z')\|\| (c >='a'&&c <='z');`
`1511`	`1511`	`elseif (locale&&locale->provider==COLLPROVIDER_LIBC)`

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Commitff33df2

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`‎src/backend/utils/adt/like_support.c`

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