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https://issues.apache.org/jira/browse/TAJO-618?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jaehwa Jung updated TAJO-618:
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Fix Version/s: (was: 1.0-incubating)
(was: 0.8-incubating)
> Catalog column length is too long.
> ----------------------------------
>
> Key: TAJO-618
> URL: https://issues.apache.org/jira/browse/TAJO-618
> Project: Tajo
> Issue Type: Bug
> Components: catalog
> Reporter: Jaehwa Jung
> Assignee: Jaehwa Jung
>
> If users use MySQLStore, one of them can finds a bug according to their mysql
> configuration as follows:
> {code:xml}
> ERROR store.MySQLStore (AbstractDBStore.java:<init>(124)) - Failed to create
> the base tables caused by
> com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Specified key was
> too long; max key length is 1000 bytestrying to drop base table
> {code}
> It will be happened by a table called COLUMNS. It uses unique key which
> consists of TABLE_ID and column_name, and these two columns have 255
> characters. Each column characters doesn’t matter, but it would be lack for
> unique key according to mysql configuration.
> If mysql characterset is UTF8, total key length for unique key will be
> calculated in this way - (255 + 255) * 3 = 1,530. At the result, it will
> exceed max limit value such as 1000 byte.
> We need to update these columns length. So, I wish to update these columns as
> follows:
> * TABLE_ID: varchar(128)
> * column_name: varchar(128)
> For reference, I borrowed from hive metastore schema. And if we update
> COLUMNS table, we should other tables which use TABLE_ID. I also think that
> DerbyStore needs to update by this issue.
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