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[Bug] There is a logical error in performing multiplication operations with a value of 0. #14291

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LingweiKuang opened this issue Dec 3, 2024 · 1 comment
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@LingweiKuang
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LingweiKuang commented Dec 3, 2024

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  • I searched in the issues and found nothing similar.

Version

version 1.3.3 (Build: ad95a7e)

Describe the bug and provide the minimal reproduce step

DROP DATABASE root.db0
CREATE DATABASE root.db0

CREATE TIMESERIES root.db0.t1 WITH datatype=INT32;
INSERT INTO root.db0(timestamp, t1) VALUES (1641024000000, 0);

# query 1
SELECT t1 FROM root.db0 WHERE (-1) * t1 == 0;

# query 2
SELECT t1 FROM root.db0 WHERE (-1) * t1 == -0.0;

What did you expect to see?

Query 1 returned result set: 0

Query 2 returned result set: 0

What did you see instead?

Query 1 returned result set: empty set

Query 2 returned result set: 0

Anything else?

Dear IoTDB team, In the query above, the result of the expression (-1) * t1 is -0.0. In principle, this value should be equivalent to 0. However, a comparison of the results from Query 1 and Query 2 indicates that the two are not equal. The same logical error also exists in division operations.

Are you willing to submit a PR?

  • I'm willing to submit a PR!
@LingweiKuang
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There is a logical error in performing multiplication operations with a value of 0

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