=?ISO-8859-15?Q?Martin_M=FCnstermann?= <[EMAIL PROTECTED]> writes:
> It's even a little more bizarre:
> When I start a fresh psql session, SELECT 'infinity'::float4 just works.
> Then I \i sql/float4.sql, and after that
> template1=# \set VERBOSITY verbose
> template1=# SELECT 'infinity'::float4;
> ERROR:  22P02: invalid input syntax for type real: "infinity"
> LOCATION:  float4in, float.c:330

Wow.  Well, that confirms my suspicion that endptr is bad --- the line
number shows that the complaint is coming from the
junk-at-end-of-the-string test.  But why is it history-dependent?

I wonder if endptr might not be getting set at all in this case.
Could you try adding "endptr = num;" to the code in
src/backend/utils/adt/float.c, that is


        /* skip leading whitespace */
        while (*num != '\0' && isspace((unsigned char) *num))
                num++;

+       endptr = num;
        errno = 0;
        val = strtod(num, &endptr);

        /* did we not see anything that looks like a double? */

at about line 280, and similarly at line 445.  Does that make it
any better?

                        regards, tom lane

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