[TAJO-397] Implement sign function

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.8.0
• Component/s: Function/UDF
• Assignee: DaeMyung Kang
• Reporter: DaeMyung Kang
• Created: 08/Dec/13 03:13
• Updated: 08/Dec/13 12:42
• Resolved: 08/Dec/13 12:35

Description

float8 sign(float8)

if value is greater than 0 return 1.0
if value is equals to 0 return 0.0
if value is less than 0 return -1.0