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to_number(): allow 'V' to divide by 10^(the number of digits)

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to_char('V') already multiplied in a similar manner.

Report by Jeremy Lowery
This commit is contained in:
Bruce Momjian
2015-10-05 21:03:38 -04:00
parent 2145a76604
commit 28b3a3d41a
2 changed files with 23 additions and 4 deletions
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19
src/backend/utils/adt/formatting.c
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@ -5055,7 +5055,7 @@ numeric_to_number(PG_FUNCTION_ARGS)
VARSIZE(value) - VARHDRSZ, 0, 0, false, PG_GET_COLLATION());
scale = Num.post;
precision = Max(0, Num.pre) + scale;
precision = Num.pre + Num.multi + scale;
if (shouldFree)
pfree(format);
@ -5064,6 +5064,23 @@ numeric_to_number(PG_FUNCTION_ARGS)
CStringGetDatum(numstr),
ObjectIdGetDatum(InvalidOid),
Int32GetDatum(((precision << 16) | scale) + VARHDRSZ));
if (IS_MULTI(&Num))
{
Numeric x;
Numeric a = DatumGetNumeric(DirectFunctionCall1(int4_numeric,
Int32GetDatum(10)));
Numeric b = DatumGetNumeric(DirectFunctionCall1(int4_numeric,
Int32GetDatum(-Num.multi)));
x = DatumGetNumeric(DirectFunctionCall2(numeric_power,
NumericGetDatum(a),
NumericGetDatum(b)));
result = DirectFunctionCall2(numeric_mul,
result,
NumericGetDatum(x));
}
pfree(numstr);
return result;
}