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https://issues.apache.org/jira/browse/KYLIN-2801?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Billy Liu resolved KYLIN-2801.
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Resolution: Fixed
Assignee: hongbin ma
Fix Version/s: v2.3.0
Commit: http://git-wip-us.apache.org/repos/asf/kylin/commit/a3d42f11
> Make default precision and scale in DataType (for hive) configurable
> --------------------------------------------------------------------
>
> Key: KYLIN-2801
> URL: https://issues.apache.org/jira/browse/KYLIN-2801
> Project: Kylin
> Issue Type: Improvement
> Reporter: hongbin ma
> Assignee: hongbin ma
> Priority: Major
> Fix For: v2.3.0
>
>
> currently these values are hard coded:
> {code:java}
> // FIXME 256 for unknown string precision
> if ((name.equals("char") || name.equals("varchar")) && precision ==
> -1) {
> precision = 256; // to save memory at frontend, e.g. tableau will
> // allocate memory according to this
> if (name.equals("char")) {
> precision -= 1; //at most 255 according to
> https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Types#LanguageManualTypes-CharcharChar
> }
> }
> // FIXME (19,4) for unknown decimal precision
> if ((name.equals("decimal") || name.equals("numeric")) && precision
> == -1) {
> precision = 19;
> scale = 4;
> }
> {code}
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