/* The characters that always need to be quoted (with backslash) are newline,
tab, carriage return, backspace, backslash itself, and the quote characters.
-Percent and underscore are only special in contexts where they can be wild
-cards, and this isn't usually the case for data inserted from messages, since
-that isn't likely to be treated as a pattern of any kind. However, pgsql seems
-to allow escaping "on spec". If you use something like "where id="ab\%cd" it
-does treat the string as "ab%cd". So we can safely quote percent and
-underscore. [This is different to MySQL, where you can't do this.]
The original code quoted single quotes as \' which is documented as valid in
the O'Reilly book "Practical PostgreSQL" (first edition) as an alternative to
if (opt != NULL) return NULL; /* No options recognized */
while ((c = *t++) != 0)
- if (Ustrchr("\n\t\r\b\'\"\\%_", c) != NULL) count++;
+ if (Ustrchr("\n\t\r\b\'\"\\", c) != NULL) count++;
if (count == 0) return s;
t = quoted = store_get(Ustrlen(s) + count + 1);
*t++ = '\'';
*t++ = '\'';
}
- else if (Ustrchr("\n\t\r\b\"\\%_", c) != NULL)
+ else if (Ustrchr("\n\t\r\b\"\\", c) != NULL)
{
*t++ = '\\';
switch(c)