[jira] [Created] (DRILL-3473) No check for duplicate schema name from storage plug-ins

["Daniel Barclay (Drill) (JIRA)" <ji...@apache.org>]

Daniel Barclay (Drill) created DRILL-3473:
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             Summary: No check for duplicate schema name from storage plug-ins
                 Key: DRILL-3473
                 URL: https://issues.apache.org/jira/browse/DRILL-3473
             Project: Apache Drill
          Issue Type: Bug
            Reporter: Daniel Barclay (Drill)


There doesn't seem to be any check and warning for the case in which two storage plug-in configuration/instances register schemas with the same name.  

(Although that case probably doesn't occur with current plug-ins, which seem to use the already-unique plug-in configuration name as the schema name, it could occur with future plug-ins (either if no specification of plug-ins disallows it or if the plug-in writer makes an error).

The problem seems to be that Calcite's SimpleCalciteSchema.add(...) doesn't check for duplicates (and/or that Drill doesn't wrap something enough to provide that duplicate check for plugins, or maybe that Drill doesn't specify which code (each plug-in adding a schema?) has responsibility for checking).








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