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 bba578f45f5b0..b2e0eb7ec2808 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
@@ -95,25 +95,31 @@ 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 FixedArgument == false);
+        var usesWarnings = processFunction.warnExceptions.isEmpty() == false || hasFixedProcessFunctionArgs && allNullsIsNull;
 
+        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 FixedArgument == false)) {
+            if (hasFixedProcessFunctionArgs) {
                 builder.addMethod(realEval(true));
             }
         } else {
-            if (processFunction.args.stream().anyMatch(x -> x instanceof FixedArgument == 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;
 
diff --git a/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsBooleanEvaluator.java b/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsBooleanEvaluator.java
index 423bf0c22b09b..70f31da8e14ec 100644
--- a/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsBooleanEvaluator.java
+++ b/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsBooleanEvaluator.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.core.Releasables;
 import org.elasticsearch.xpack.esql.core.tree.Source;
 
@@ -31,8 +30,6 @@ public final class MvContainsBooleanEvaluator implements EvalOperator.Expression
 
   private final DriverContext driverContext;
 
-  private Warnings warnings;
-
   public MvContainsBooleanEvaluator(Source source, EvalOperator.ExpressionEvaluator superset,
       EvalOperator.ExpressionEvaluator subset, DriverContext driverContext) {
     this.source = source;
@@ -78,18 +75,6 @@ public void close() {
     Releasables.closeExpectNoException(superset, subset);
   }
 
-  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;
 
diff --git a/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsBytesRefEvaluator.java b/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsBytesRefEvaluator.java
index c614b9b28ad19..32601030c0b5c 100644
--- a/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsBytesRefEvaluator.java
+++ b/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsBytesRefEvaluator.java
@@ -13,7 +13,6 @@
 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.core.Releasables;
 import org.elasticsearch.xpack.esql.core.tree.Source;
 
@@ -32,8 +31,6 @@ public final class MvContainsBytesRefEvaluator implements EvalOperator.Expressio
 
   private final DriverContext driverContext;
 
-  private Warnings warnings;
-
   public MvContainsBytesRefEvaluator(Source source, EvalOperator.ExpressionEvaluator superset,
       EvalOperator.ExpressionEvaluator subset, DriverContext driverContext) {
     this.source = source;
@@ -79,18 +76,6 @@ public void close() {
     Releasables.closeExpectNoException(superset, subset);
   }
 
-  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;
 
diff --git a/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsDoubleEvaluator.java b/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsDoubleEvaluator.java
index e429a3c53abda..ade77c7f1c097 100644
--- a/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsDoubleEvaluator.java
+++ b/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsDoubleEvaluator.java
@@ -13,7 +13,6 @@
 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.core.Releasables;
 import org.elasticsearch.xpack.esql.core.tree.Source;
 
@@ -32,8 +31,6 @@ public final class MvContainsDoubleEvaluator implements EvalOperator.ExpressionE
 
   private final DriverContext driverContext;
 
-  private Warnings warnings;
-
   public MvContainsDoubleEvaluator(Source source, EvalOperator.ExpressionEvaluator superset,
       EvalOperator.ExpressionEvaluator subset, DriverContext driverContext) {
     this.source = source;
@@ -78,18 +75,6 @@ public void close() {
     Releasables.closeExpectNoException(superset, subset);
   }
 
-  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;
 
diff --git a/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsIntEvaluator.java b/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsIntEvaluator.java
index 762ae0d190ac5..9fb876bff9156 100644
--- a/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsIntEvaluator.java
+++ b/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsIntEvaluator.java
@@ -13,7 +13,6 @@
 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.core.Releasables;
 import org.elasticsearch.xpack.esql.core.tree.Source;
 
@@ -32,8 +31,6 @@ public final class MvContainsIntEvaluator implements EvalOperator.ExpressionEval
 
   private final DriverContext driverContext;
 
-  private Warnings warnings;
-
   public MvContainsIntEvaluator(Source source, EvalOperator.ExpressionEvaluator superset,
       EvalOperator.ExpressionEvaluator subset, DriverContext driverContext) {
     this.source = source;
@@ -78,18 +75,6 @@ public void close() {
     Releasables.closeExpectNoException(superset, subset);
   }
 
-  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;
 
diff --git a/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsLongEvaluator.java b/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsLongEvaluator.java
index bac4892c07a12..c58efe18f9126 100644
--- a/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsLongEvaluator.java
+++ b/x-pack/plugin/esql/src/main/generated/org/elasticsearch/xpack/esql/expression/function/scalar/multivalue/MvContainsLongEvaluator.java
@@ -13,7 +13,6 @@
 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.core.Releasables;
 import org.elasticsearch.xpack.esql.core.tree.Source;
 
@@ -32,8 +31,6 @@ public final class MvContainsLongEvaluator implements EvalOperator.ExpressionEva
 
   private final DriverContext driverContext;
 
-  private Warnings warnings;
-
   public MvContainsLongEvaluator(Source source, EvalOperator.ExpressionEvaluator superset,
       EvalOperator.ExpressionEvaluator subset, DriverContext driverContext) {
     this.source = source;
@@ -78,18 +75,6 @@ public void close() {
     Releasables.closeExpectNoException(superset, subset);
   }
 
-  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;