[GitHub] [incubator-doris] xinghuayu007 commented on a change in pull request #4439: Validate the param of rand function in compile step

[GitBox <gi...@apache.org>]

xinghuayu007 commented on a change in pull request #4439:
URL: https://github.com/apache/incubator-doris/pull/4439#discussion_r476419682



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File path: fe/fe-core/src/main/java/org/apache/doris/analysis/Expr.java
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@@ -1405,7 +1405,15 @@ protected Function getBuiltinFunction(
             throws AnalysisException {
         FunctionName fnName = new FunctionName(name);
         Function searchDesc = new Function(fnName, argTypes, Type.INVALID, false);
-        return Catalog.getCurrentCatalog().getFunction(searchDesc, mode);
+        Function f = Catalog.getCurrentCatalog().getFunction(searchDesc, mode);
+        if (f != null && fnName.getFunction().equalsIgnoreCase("rand")) {
+            if (this.children != null

Review comment:
       Rand function has two implements. One is Rand(const int), the other is Rand() without parm**.  this.children != null** filters Rand() without param.




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