diff options
Diffstat (limited to 'src/backend/utils/adt/numeric.c')
| -rw-r--r-- | src/backend/utils/adt/numeric.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/backend/utils/adt/numeric.c b/src/backend/utils/adt/numeric.c index 796f5173f1c..1de744855f3 100644 --- a/src/backend/utils/adt/numeric.c +++ b/src/backend/utils/adt/numeric.c @@ -10266,9 +10266,13 @@ power_var(const NumericVar *base, const NumericVar *exp, NumericVar *result) */ ln_dweight = estimate_ln_dweight(base); + /* + * Set the scale for the low-precision calculation, computing ln(base) to + * around 8 significant digits. Note that ln_dweight may be as small as + * -SHRT_MAX, so the scale may exceed NUMERIC_MAX_DISPLAY_SCALE here. + */ local_rscale = 8 - ln_dweight; local_rscale = Max(local_rscale, NUMERIC_MIN_DISPLAY_SCALE); - local_rscale = Min(local_rscale, NUMERIC_MAX_DISPLAY_SCALE); ln_var(base, &ln_base, local_rscale); |