chore(druid): Standardizing time grain transformations #17050
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| "PT5S": "TIME_FLOOR({col}, 'PT5S')", | ||
| "PT30S": "TIME_FLOOR({col}, 'PT30S')", | ||
| "PT1M": "FLOOR({col} TO MINUTE)", | ||
| "PT1M": "TIME_FLOOR({col}, 'PT1M')", | ||
| "PT5M": "TIME_FLOOR({col}, 'PT5M')", | ||
| "PT10M": "TIME_FLOOR({col}, 'PT10M')", | ||
| "PT15M": "TIME_FLOOR({col}, 'PT15M')", | ||
| "PT0.5H": "TIME_FLOOR({col}, 'PT30M')", |
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@villebro I've never understood why this is PT0.5H ("Half hour") as opposed to PT30M ("30 minute"). I was thinking of doing a pass to change these—which will require a database migration. Thoughts?
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I've wondered about this before, as well as why P0.25Y is used in Superset instead of P3M. I tried looking at ISO-8601 to see if there's any guidance there, but I can't find anything. So I think they might be used interchangeably. However, since the decimal character varies from country to country, I think we'd be better off replacing PT0.5H and P0.25Y with PT30M and P3M respectively.
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I think it's because originally it was called just "half an hour", so PT0.5H mad sense. It was a direct translation, and I was just looking for a way to standardize the intervals across DB engine specs.
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## master #17050 +/- ##
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Coverage 76.91% 76.91%
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Files 1031 1031
Lines 55163 55163
Branches 7501 7501
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+ Hits 42428 42430 +2
+ Misses 12483 12481 -2
Partials 252 252
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| "PT5S": "TIME_FLOOR({col}, 'PT5S')", | ||
| "PT30S": "TIME_FLOOR({col}, 'PT30S')", | ||
| "PT1M": "FLOOR({col} TO MINUTE)", | ||
| "PT1M": "TIME_FLOOR({col}, 'PT1M')", | ||
| "PT5M": "TIME_FLOOR({col}, 'PT5M')", | ||
| "PT10M": "TIME_FLOOR({col}, 'PT10M')", | ||
| "PT15M": "TIME_FLOOR({col}, 'PT15M')", | ||
| "PT0.5H": "TIME_FLOOR({col}, 'PT30M')", |
There was a problem hiding this comment.
I've wondered about this before, as well as why P0.25Y is used in Superset instead of P3M. I tried looking at ISO-8601 to see if there's any guidance there, but I can't find anything. So I think they might be used interchangeably. However, since the decimal character varies from country to country, I think we'd be better off replacing PT0.5H and P0.25Y with PT30M and P3M respectively.
* chore(druid): Standardizing time grain transformations * Update druid_tests.py * Update druid_tests.py Co-authored-by: John Bodley <[email protected]>
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SUMMARY
The Apache Druid time grain transformations uses a mix of
FLOOR,TIME_FLOOR, andTIMESTAMPADDUDFs. This PR merely standardizes these to consistently use theTIME_FLOORandTIME_SHIFTfunctions which both leverage the ISO 8601 standard for defining periods.TESTING INSTRUCTIONS
CI.
ADDITIONAL INFORMATION