[KYLIN-1122] Kylin support detail data query from fact table

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: v1.2
• Fix Version/s: v1.3.1, v1.5.1
• Component/s: Query Engine
• Flags: Patch
• Assignee: liyang
• Reporter: Xiaoyu Wang
• Created: 03/Nov/15 10:38
• Updated: 13/Apr/16 02:04
• Resolved: 07/Apr/16 12:57

Description

Now Kylin does not support query correct detail rows from fact table like:
select column1,column2,column3 from fact_table
The jira KYLIN-1075 add the "SUM" function on the measure column if defined.
But only the column number type is support.

I change some code to support this issue:
Add a "VALUE" measure function : the same value and datatype in the input and output of this function.

If you want to query detail data from fact table
require:
1.Configure the column which not dimensions to "VALUE" or "SUM" measure.(If not configure measure function in the column will get NULL value)
2.The source table must has an unique value column and configure it as dimension.

If you have the better solution please comment here.

2016-03-21:
The final solution:
Add a "RAW" measure function which return the list of all the value by one key.
If query detail data from fact table
require:
Configure the column to "RAW" measure.(If not configure measure function in the column and do the RAW query will get the incorrect value!)

Issue Links

• depends upon: KYLIN-976 Support Custom Aggregation Types
• links to: review board