Ruixuan Zhang created KYLIN-5445:
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Summary: Epoch tables of metadata sometimes are created without
primary key through mysql, results in failure creating table using certain
versions of database
Key: KYLIN-5445
URL: https://issues.apache.org/jira/browse/KYLIN-5445
Project: Kylin
Issue Type: Bug
Components: Metadata
Affects Versions: 5.0-alpha
Reporter: Ruixuan Zhang
Fix For: 5.0-alpha
KYLIN is using jdbc to create epoch table, sometimes creating table will
results in failure under certain versions of database due to that table does
not specify the primary key.
Therefore, the field target_epoch can be used as primary key, and its previous
constraint of being unique can be removed. For the environment that the table
has already exist, KYLIN will firstly check if the primary key exists, if so,
then target_epoch will be added as primary key.
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