Make mod iszero public, minor ordering change to keep the alphabetica…

…l ordering theme.

datafusion/functions/src/math/mod.rs

@@ -23,7 +23,7 @@ use std::sync::Arc;
 pub mod abs;
 pub mod cot;
 pub mod gcd;
-mod iszero;
+pub mod iszero;
 pub mod lcm;
 pub mod log;
 pub mod nans;
@@ -48,7 +48,6 @@ make_udf_function!(cot::CotFunc, COT, cot);
 make_math_unary_udf!(DegreesFunc, DEGREES, degrees, to_degrees, None);
 make_math_unary_udf!(FloorFunc, FLOOR, floor, floor, Some(vec![Some(true)]));
 make_udf_function!(log::LogFunc, LOG, log);
-make_udf_function!(power::PowerFunc, POWER, power);
 make_udf_function!(gcd::GcdFunc, GCD, gcd);
 make_udf_function!(nans::IsNanFunc, ISNAN, isnan);
 make_udf_function!(iszero::IsZeroFunc, ISZERO, iszero);
@@ -57,6 +56,7 @@ make_math_unary_udf!(LnFunc, LN, ln, ln, Some(vec![Some(true)]));
 make_math_unary_udf!(Log2Func, LOG2, log2, log2, Some(vec![Some(true)]));
 make_math_unary_udf!(Log10Func, LOG10, log10, log10, Some(vec![Some(true)]));
 make_udf_function!(pi::PiFunc, PI, pi);
+make_udf_function!(power::PowerFunc, POWER, power);
 make_math_unary_udf!(RadiansFunc, RADIANS, radians, to_radians, None);
 make_udf_function!(round::RoundFunc, ROUND, round);
 make_math_unary_udf!(SignumFunc, SIGNUM, signum, signum, None);