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FIX: sample(frac=...) on SQL. #1425

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kwmsmith commented Feb 19, 2016

Have to add a from_obj clause inside the sub-select.

@sandhujasmine please try this against your datasets.

FIX: sample(frac=...) on SQL.
Have to add a `from_obj` clause inside the sub-select.

@kwmsmith kwmsmith added bug sql labels Feb 19, 2016

@kwmsmith kwmsmith added this to the 0.10 milestone Feb 19, 2016

symbol, transform, summary, by, sin, join,
floor, cos, merge, nunique, mean, sum, count, exp, datetime as bz_datetime
from blaze.compute.sql import (compute, select, lower_column, compute_up,

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llllllllll Feb 19, 2016


I have a style request: can we put parenthesized imports on their own lines sorted alphabetically like:

from a import (

I have been updating these as I see them. The reason I prefer this style is that it makes it very easy to trace imports visually and understand where names are coming from. As it is now it is hard to quickly see what names are available, or the fact that sum is being aliased here.

If you have strong feeling about this please let me know,


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sandhujasmine commented Feb 19, 2016

@kwmsmith - It doesn't appear to be subsampling now. See below.

In [7]: odo(compute(sub_parts.nrows, prsx), int)
Out[7]: 40040

In [8]: odo(compute(sub_parts.sample(frac=0.75).nrows, prsx), int)
Out[8]: 40040

Also added a failing test in blaze.

Seems like Data interface is working correctly, but Symbol interface is not - some inconsistency here.


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kwmsmith commented Mar 18, 2016

Closing, as this is subsumed by #1452.

@kwmsmith kwmsmith closed this Mar 18, 2016

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