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Refactor iszero() and isnan() to accept all numeric types - #20093

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Jefffrey merged 1 commit into
apache:mainfrom
kumarUjjawal:refactor/iszero_numeric
Feb 2, 2026
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Refactor iszero() and isnan() to accept all numeric types#20093
Jefffrey merged 1 commit into
apache:mainfrom
kumarUjjawal:refactor/iszero_numeric

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@kumarUjjawal

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Which issue does this PR close?

Rationale for this change

iszero() and isnan() previously accepted “numeric” inputs by implicitly coercing them to Float64, adding unnecessary casts and work for integer/decimal inputs.

What changes are included in this PR?

  • Updated iszero() and isnan() signatures to accept TypeSignatureClass::Numeric without implicit float coercion.
  • Refactored iszero() implementation to evaluate zero checks directly for integers, unsigned integers, floats, and decimals.
  • Refactored isnan() implementation to compute is_nan only for float types and return false for all other numeric types and reduced non-float array handling to use unary kernels instead of manual iteration.
  • Added sqllogictest

Are these changes tested?

Yes

Are there any user-facing changes?

No

@github-actions github-actions Bot added sqllogictest SQL Logic Tests (.slt) functions Changes to functions implementation labels Jan 31, 2026
@kumarUjjawal kumarUjjawal changed the title Refactor iszero() and isnan() to accept all numeric types Refactor iszero() and isnan() to accept all numeric types Jan 31, 2026
@Jefffrey

Jefffrey commented Jan 31, 2026

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For decimal is_zero we need to consider the scale
E.g. negative scale can never be zero

Edit: actually maybe I'm wrong 🤔

Comment thread datafusion/functions/src/math/nans.rs
@Jefffrey
Jefffrey added this pull request to the merge queue Feb 2, 2026
@Jefffrey

Jefffrey commented Feb 2, 2026

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Thanks @kumarUjjawal

Merged via the queue into apache:main with commit c849374 Feb 2, 2026
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de-bgunter pushed a commit to de-bgunter/datafusion that referenced this pull request Mar 24, 2026
…#20093)

## Which issue does this PR close?

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enhancements and this helps us generate change logs for our releases.
You can link an issue to this PR using the GitHub syntax. For example
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- Closes apache#20089

## Rationale for this change

iszero() and isnan() previously accepted “numeric” inputs by implicitly
coercing them to Float64, adding unnecessary casts and work for
integer/decimal inputs.

<!--
Why are you proposing this change? If this is already explained clearly
in the issue then this section is not needed.
Explaining clearly why changes are proposed helps reviewers understand
your changes and offer better suggestions for fixes.
-->

## What changes are included in this PR?

- Updated iszero() and isnan() signatures to accept
TypeSignatureClass::Numeric without implicit float coercion.
- Refactored iszero() implementation to evaluate zero checks directly
for integers, unsigned integers, floats, and decimals.
- Refactored isnan() implementation to compute is_nan only for float
types and return false for all other numeric types and reduced non-float
array handling to use unary kernels instead of manual iteration.
 - Added  sqllogictest

<!--
There is no need to duplicate the description in the issue here but it
is sometimes worth providing a summary of the individual changes in this
PR.
-->

## Are these changes tested?

Yes

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We typically require tests for all PRs in order to:
1. Prevent the code from being accidentally broken by subsequent changes
2. Serve as another way to document the expected behavior of the code

If tests are not included in your PR, please explain why (for example,
are they covered by existing tests)?
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## Are there any user-facing changes?
No

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updated before approving the PR.
-->

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If there are any breaking changes to public APIs, please add the `api
change` label.
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Refactor iszero() and isnan() to accept all numeric types

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