Zhong Yanghong created KYLIN-3739:
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Summary: Use table alias rather than table identity for snapshots
in CubeSegment, CubeInstance, CubeDesc
Key: KYLIN-3739
URL: https://issues.apache.org/jira/browse/KYLIN-3739
Project: Kylin
Issue Type: Improvement
Components: Metadata
Reporter: Zhong Yanghong
In 2.0.0, Kylin introduced table alias in DataModelDesc. Most of the elements
in CubeDesc, CubeInstance & CubeSegment use the table alias rather than the
table identity. However, for the lookup table snapshots, it still uses table
identity.
It's better for us to use only table alias instead of table identity in
CubeDesc, CubeInstance & CubeSegment. If so, it can provide several advantages:
# For CubeDesc, CubeInstance & CubeSegment, what exposed to them is only the
snowflake model and they don't need to care which real table is used.
# If users want to change the table name in the snowflake model, we can still
keep the table alias unchanged and what we need to change is only the
DataModelDesc. And we don't need to do any change for CubeDesc, CubeInstance &
CubeSegment.
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