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[BUG] [GPU Logic Bug] SELECT (<number>) NOT IN (CASE <column> WHEN <number> THEN <number> END) FROM <table> brings Error #1341

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qwebug opened this issue Jun 5, 2024 · 0 comments
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bug Something isn't working needs triage Awaiting triage by a dask-sql maintainer

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@qwebug
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qwebug commented Jun 5, 2024

What happened:

SELECT (<number>) NOT IN (CASE <column> WHEN <number> THEN <number> END) FROM <table> brings different results, when using CPU and GPU execution.

What you expected to happen:

It is the same result, when using CPU and GPU execution.

Minimal Complete Verifiable Example:

import pandas as pd
import dask.dataframe as dd
from dask_sql import Context

c = Context()

df0 = pd.DataFrame({
    'c0': [0.1],
})
t0 = dd.from_pandas(df0, npartitions=1)

c.create_table('t0', t0, gpu=False)
c.create_table('t0_gpu', t0, gpu=True)

print('CPU Result:')
result1 = c.sql("SELECT (0.1) NOT IN (CASE t0.c0 WHEN 1 THEN 2 END) FROM t0").compute()
print(result1)

print('GPU Result:')
result2 = c.sql("SELECT (0.1) NOT IN (CASE t0_gpu.c0 WHEN 1 THEN 2 END) FROM t0_gpu").compute()
print(result2)

Result:

INFO:numba.cuda.cudadrv.driver:init
CPU Result:
   Float64(0.1) NOT IN (Map { iter: Iter([CASE t0.c0 WHEN Int64(1) THEN Int64(2) END]) })
0                                               True                                     
GPU Result:
  Float64(0.1) NOT IN (Map { iter: Iter([CASE t0_gpu.c0 WHEN Int64(1) THEN Int64(2) END]) })
0                                               <NA>                                        
INFO:numba.cuda.cudadrv.driver:add pending dealloc: module_unload ? bytes

Anything else we need to know?:

Environment:

@qwebug qwebug added bug Something isn't working needs triage Awaiting triage by a dask-sql maintainer labels Jun 5, 2024
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