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fix: ln() error on non-positive input (PostgreSQL compat) #22579

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fix: ln() error on non-positive input (PostgreSQL compat) #22579

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11 changes: 10 additions & 1 deletion datafusion/functions/src/math/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,14 @@ fn validate_sqrt_input(value: f64) -> Result<()> {
}
}

fn validate_ln_input(value: f64) -> Result<()> {
if value <= 0.0 {
exec_err!("cannot take logarithm of a negative number")
} else {
Ok(())
}
}

// Create UDFs
make_udf_function!(abs::AbsFunc, abs);
make_math_unary_udf!(
Expand Down Expand Up @@ -163,7 +171,8 @@ make_math_unary_udf!(
ln,
super::ln_order,
super::bounds::unbounded_bounds,
super::get_ln_doc
super::get_ln_doc,
Some(super::validate_ln_input)
);
make_math_unary_udf!(
Log2Func,
Expand Down