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Re-allow underscore as first character of custom GUC names.

Browse Source 
Commit 3db826bd5 intended that valid_custom_variable_name's
rules for valid identifiers match those of scan.l.  However,
I (tgl) had some kind of brain fade and put "_" in the wrong
list.

Fix by Japin Li, per bug #17415 from Daniel Polski.

Discussion: https://postgr.es/m/17415-ebdb683d7e09a51c@postgresql.org
This commit is contained in:
Tom Lane
2022-02-23 11:10:46 -05:00
parent 627c79a1e8
commit dd7c059791
1 changed files with 2 additions and 2 deletions
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4
src/backend/utils/misc/guc.c
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@ -5390,13 +5390,13 @@ valid_custom_variable_name(const char *name)
name_start = true;
}
else if (strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz", *p) != NULL ||
"abcdefghijklmnopqrstuvwxyz_", *p) != NULL ||
IS_HIGHBIT_SET(*p))
{
/* okay as first or non-first character */
name_start = false;
}
else if (!name_start && strchr("0123456789_$", *p) != NULL)
else if (!name_start && strchr("0123456789$", *p) != NULL)
/* okay as non-first character */ ;
else
return false;