feat(numeric): add more functions

arroyo-sql-testing/src/lib.rs

@@ -1331,4 +1331,75 @@ mod tests {
         },
         PI
     );
+
+    // iszero
+    single_test_codegen!(
+        "yes_iszero",
+        "iszero(0)",
+        arroyo_sql::TestStruct {
+            ..Default::default()
+        },
+        true
+    );
+
+    single_test_codegen!(
+        "no_iszero",
+        "iszero(1)",
+        arroyo_sql::TestStruct {
+            ..Default::default()
+        },
+        false
+    );
+
+    single_test_codegen!(
+        "nan_iszero",
+        "iszero(non_nullable_f64)",
+        arroyo_sql::TestStruct {
+            non_nullable_f64: f64::NAN,
+            ..Default::default()
+        },
+        false
+    );
+
+    // isnan
+    single_test_codegen!(
+        "yes_isnan",
+        "isnan(non_nullable_f64)",
+        arroyo_sql::TestStruct {
+            non_nullable_f64: f64::NAN,
+            ..Default::default()
+        },
+        true
+    );
+
+    single_test_codegen!(
+        "no_isnan",
+        "isnan(non_nullable_f64)",
+        arroyo_sql::TestStruct {
+            non_nullable_f64: 1f64,
+            ..Default::default()
+        },
+        false
+    );
+
+    // nanvl
+    single_test_codegen!(
+        "nan_nanvl",
+        "nanvl(non_nullable_f64,1)",
+        arroyo_sql::TestStruct {
+            non_nullable_f64: f64::NAN,
+            ..Default::default()
+        },
+        1f64
+    );
+
+    single_test_codegen!(
+        "no_nan_nanvl",
+        "nanvl(non_nullable_f64,1)",
+        arroyo_sql::TestStruct {
+            non_nullable_f64: 2f64,
+            ..Default::default()
+        },
+        2f64
+    );
 }