[HIVE-6027] non-vectorized log10 has rounding issue

• Type: Bug
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Fix Version/s: 0.13.0
• Assignee: Sergey Shelukhin
• Reporter: Sergey Shelukhin
• Created: 12/Dec/13 23:20
• Updated: 13/Dec/13 18:46
• Resolved: 13/Dec/13 18:46

Description

In HIVE-6010, I found that vectorized and non-vectorized log10 may produce different results in the last digit of the mantissa (e.g. 7 vs 8). It turns out that vectorized one uses Math.log10, but non-vectorized uses log/log(10). Both should use Math.log10.