### Elasticsearch Version

main

### Installed Plugins

_No response_

### Java Version

_bundled_

### OS Version

all

### Problem Description

Do this

### Steps to Reproduce

```
rm /tmp/evil
for a in {0..9}; do
   for b in {0..9}; do
      echo '{"index": {}}' >> /tmp/evil
      echo '{"a": '$a', "b": '$b'}' >> /tmp/evil
   done
done
echo >> /tmp/evil

curl -uelastic:password -XDELETE localhost:9200/test
curl -HContent-Type:application/json -uelastic:password -XPUT localhost:9200/test
curl -HContent-Type:application/json -uelastic:password -XPOST localhost:9200/test/_bulk --data-binary @/tmp/evil
curl -HContent-Type:application/json -uelastic:password -XPOST localhost:9200/test/_forcemerge?max_num_segments=1
curl -HContent-Type:application/json -uelastic:password -XPOST localhost:9200/test/_refresh

curl -HContent-Type:application/json -uelastic:password -XPOST localhost:9200/_esql?pretty -d'{
   "query": "FROM test | STATS MAX(a) BY a, b | KEEP a"
}'
```

### Logs (if relevant)

_No response_
x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/planner/LocalExecutionPlanner.java
esQuery.sorts(),
                esQuery.estimatedRowSize()
            );
        }
        return physicalOperationProviders.sourcePhysicalOperation(esQuery, context);
    }
    private PhysicalOperation planFieldExtractNode(LocalExecutionPlannerContext context, FieldExtractExec fieldExtractExec) {
        return physicalOperationProviders.fieldExtractPhysicalOperation(fieldExtractExec, plan(fieldExtractExec.child(), context));
    }
    /**
     * Map QL's {@link DataType} to the compute engine's {@link ElementType}.
     */
    public static ElementType toElementType(DataType dataType) {
        if (dataType == DataTypes.LONG || dataType == DataTypes.DATETIME || dataType == DataTypes.UNSIGNED_LONG) {
            return ElementType.LONG;
        }
        if (dataType == DataTypes.INTEGER) {
            return ElementType.INT;
        }
        if (dataType == DataTypes.DOUBLE) {
            return ElementType.DOUBLE;
        }
        
        if (dataType == DataTypes.KEYWORD
            || dataType == DataTypes.TEXT
            || dataType == DataTypes.IP
            || dataType == DataTypes.VERSION
            || dataType == DataTypes.UNSUPPORTED) {
            return ElementType.BYTES_REF;
        }