diff --git a/x-pack/plugin/esql/compute/gen/src/main/java/org/elasticsearch/compute/gen/EvaluatorImplementer.java b/x-pack/plugin/esql/compute/gen/src/main/java/org/elasticsearch/compute/gen/EvaluatorImplementer.java
index e5b6e4992f1a2..de951ddccd071 100644
--- a/x-pack/plugin/esql/compute/gen/src/main/java/org/elasticsearch/compute/gen/EvaluatorImplementer.java
+++ b/x-pack/plugin/esql/compute/gen/src/main/java/org/elasticsearch/compute/gen/EvaluatorImplementer.java
@@ -105,25 +105,31 @@ private TypeSpec type() {
         processFunction.args.forEach(a -> a.declareField(builder));
         builder.addField(DRIVER_CONTEXT, "driverContext", Modifier.PRIVATE, Modifier.FINAL);
 
-        builder.addField(WARNINGS, "warnings", Modifier.PRIVATE);
+        var hasFixedProcessFunctionArgs = processFunction.args.stream().anyMatch(x -> x instanceof FixedProcessFunctionArg == false);
+        var usesWarnings = processFunction.warnExceptions.isEmpty() == false || hasFixedProcessFunctionArgs;
 
+        if (usesWarnings) {
+            builder.addField(WARNINGS, "warnings", Modifier.PRIVATE);
+        }
         builder.addMethod(ctor());
         builder.addMethod(eval());
         builder.addMethod(processFunction.baseRamBytesUsed());
 
         if (processOutputsMultivalued) {
-            if (processFunction.args.stream().anyMatch(x -> x instanceof FixedProcessFunctionArg == false)) {
+            if (hasFixedProcessFunctionArgs) {
                 builder.addMethod(realEval(true));
             }
         } else {
-            if (processFunction.args.stream().anyMatch(x -> x instanceof FixedProcessFunctionArg == false)) {
+            if (hasFixedProcessFunctionArgs) {
                 builder.addMethod(realEval(true));
             }
             builder.addMethod(realEval(false));
         }
         builder.addMethod(processFunction.toStringMethod(implementation));
         builder.addMethod(processFunction.close());
-        builder.addMethod(warnings());
+        if (usesWarnings) {
+            builder.addMethod(warnings());
+        }
         return builder.build();
     }
 
diff --git a/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/date/NowEvaluator.java b/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/date/NowEvaluator.java
index a5e1ac73bcd02..3e700804976e0 100644
--- a/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/date/NowEvaluator.java
+++ b/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/date/NowEvaluator.java
@@ -12,7 +12,6 @@
 import org.elasticsearch.compute.data.Page;
 import org.elasticsearch.compute.operator.DriverContext;
 import org.elasticsearch.compute.operator.EvalOperator;
-import org.elasticsearch.compute.operator.Warnings;
 import org.elasticsearch.xpack.esql.core.tree.Source;
 
 /**
@@ -28,8 +27,6 @@ public final class NowEvaluator implements EvalOperator.ExpressionEvaluator {
 
   private final DriverContext driverContext;
 
-  private Warnings warnings;
-
   public NowEvaluator(Source source, long now, DriverContext driverContext) {
     this.source = source;
     this.now = now;
@@ -65,18 +62,6 @@ public String toString() {
   public void close() {
   }
 
-  private Warnings warnings() {
-    if (warnings == null) {
-      this.warnings = Warnings.createWarnings(
-              driverContext.warningsMode(),
-              source.source().getLineNumber(),
-              source.source().getColumnNumber(),
-              source.text()
-          );
-    }
-    return warnings;
-  }
-
   static class Factory implements EvalOperator.ExpressionEvaluator.Factory {
     private final Source source;