himanshug commented on issue #7255: [PROPOSAL] Schemeless Dimensions Support URL: https://github.com/apache/incubator-druid/issues/7255#issuecomment-486464257 SGTM as a feature. In fact this doesn't exist only because non-String dimension columns were an afterthought. > If given dimension name is not matched within defined schema: I wouldn't change the default behavior for backward compatibility, reasons using patterns is fine. auto type-detection based on value observed might not work because you might determine type to be "long" on observing first couple of rows but then you see a non-long value at later time. > Only open question is deciding the format of the regex pattern. Druid uses java regex pattern in different places so that would be a good choice. From the proposal, It is not clear where the {pattern,type} blob would be written inside overall indexing task spec .
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