[IMPALA-12548] Clarify the meaning of AGG_MEM_CORRELATION_FACTOR

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 4.3.0
• Fix Version/s: Impala 4.4.0
• Epic Color: ghx-label-13
• Assignee: Riza Suminto
• Reporter: Riza Suminto
• Created: 08/Nov/23 02:58
• Updated: 24/Sep/24 17:27
• Resolved: 09/Nov/23 20:28

Description

AGG_MEM_CORRELATION_FACTOR has valid value between 0.0 to 1.0. This query option name can be misinterpreted as high value means highly correlated columns, but it is actually the opposite in the code implementation. 1.0 is interpreted as no correlation at all in the code, while <1.0 means somewhat correlated. Documentation should be clarified about this.