rishvin opened a new pull request, #1971:
URL: https://github.com/apache/datafusion-comet/pull/1971
## Which issue does this PR close?
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Closes #532
## Rationale for this change
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Spark in ANSI mode can throw division by zero exception for remainder,
however, the remainder implementation in Comet is not ANSI compliant and rather
than throwing division by zero, returns NULL. This PR introduces remainder that
is compliant with Spark behavior, both in ANSI and non-ANSI mode.
## What changes are included in this PR?
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- Adds a new physical expression `ModuloExpr`. This expression supports both
ANSI and non-ANSI mode (via `fail_on_error` flag). In ANSI mode, it translates
the Arrow's division by zero error to Spark compliant error message.
- Removes the call to `nullIfWhenPrimitive`, when serializing the remainder
exception, and implements equivalent functionality in `ModuloExpr`. This method
set null values for RHS record batches that have zero values in them. This is
required for non-ANSI mode, otherwise Arrow's remainder implementation will
throw divide by zero exception.
- Adds rust and scala tests cases to verify remainder behaviour both in ANSI
and non-ANSI mode.
## How are these changes tested?
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Added rust and scala tests to verify the behavior.
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