Hi Alexandre-san

Thank you for summarizing the strategy. I agreed your design principle.
Per your phase, I feel we are on the phase 0 or 1, we can first commit the 
basic architecture.

> Note:
> I had different expectations, the first query uses two columns and filters 
> over a 1-year period, the second query uses only one column and filters over.
> My first expectation was that if only one column is used there is less data 
> being accessed.
> In my experience most queries will care about a timestamp column, it would be 
> nice to be able to cluster the data by certain columns (in my case the 
> created) column
> Maybe even clustering by multiple columns independently mediated by CRID 
> permutations. If you think that this is easy enough we could insert this 
> before phase 3.

The number of rows accessed by the first query and the number of
rows in the second query differ significantly.
This isn't only because one query uses a single column. Therefore,
I understood the advice to be that even when using VCI, it would be
beneficial to enable clustering on another column,
such as the created column, right?

Best regards,
Aya Iwata

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