KKcorps commented on a change in pull request #8304:
URL: https://github.com/apache/pinot/pull/8304#discussion_r829106046
##########
File path:
pinot-common/src/main/java/org/apache/pinot/common/function/scalar/ArithmeticFunctions.java
##########
@@ -104,4 +111,30 @@ public static double ln(double a) {
public static double sqrt(double a) {
return Math.sqrt(a);
}
+
+ @ScalarFunction
+ public static double sign(double a) {
+ return Math.signum(a);
+ }
+
+ @ScalarFunction
+ public static double pi() { return Math.PI; }
+
+ @ScalarFunction
+ public static double e() { return Math.E; }
+
+ @ScalarFunction
+ public static double power(double a, double b) {
+ return Math.pow(a, b);
+ }
+
+ @ScalarFunction
+ public static double log(double a) {
+ return Math.log10(a);
+ }
Review comment:
@mneedham I had discussion with @Jackie-Jiang in which he confirmed that
Pinot prioritises TransformFunctions first and if not found, it will use
ScalarFunctions. Both can have the same name. The following piece of code in
`TransformFunctionFactory` ensures this order.
```java
TransformFunction transformFunction;
Class<? extends TransformFunction> transformFunctionClass =
TRANSFORM_FUNCTION_MAP.get(functionName);
if (transformFunctionClass != null) {
// Transform function
try {
transformFunction = transformFunctionClass.newInstance();
} catch (Exception e) {
throw new RuntimeException("Caught exception while constructing
transform function: " + functionName, e);
}
} else {
// Scalar function
FunctionInfo functionInfo =
FunctionRegistry.getFunctionInfo(functionName, numArguments);
if (functionInfo == null) {
if (FunctionRegistry.containsFunction(functionName)) {
throw new BadQueryRequestException(
String.format("Unsupported function: %s with %d parameters",
functionName, numArguments));
} else {
throw new BadQueryRequestException(
String.format("Unsupported function: %s not found",
functionName));
}
}
transformFunction = new
ScalarTransformFunctionWrapper(functionInfo);
}
```
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