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[feature request] SHOW TAG KEYS/VALUES should accept a WHERE time clause

Rather than update `DISTINCT()` to accept tags (https://github.com/influxdata/influxdb/issues/3880), we could accomplish much the same goal if the `SHOW TAG VALUES` query respected a `WHERE time` clause. SHOW TAG VALUES already returns the deduplicated set of values. It is not trivial, since the query can no longer be answered directly from the metastore, but it seems easier than making functions accept tags, which is a totally new code path.

Posted by beckettsean on Feb 13, 2016, 1:37 AM

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[feature request] SHOW TAG KEYS/VALUES should accept a WHERE time clause

beckettseanFeb 13, 2016, 1:37 AM

Rather than update `DISTINCT()` to accept tags (https://github.com/influxdata/influxdb/issues/3880), we could accomplish much the same goal if the `SHOW TAG VALUES` query respected a `WHERE time` clause. SHOW TAG VALUES already returns the deduplicated set of values. It is not trivial, since the query can no longer be answered directly from the metastore, but it seems easier than making functions accept tags, which is a totally new code path.

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