Assume all fieldName args are literals

Author: Bargs

src/ui/public/kuery/functions/geo_bounding_box.js

@@ -17,7 +17,7 @@ export function buildNodeParams(fieldName, params) {
 
 export function toElasticsearchQuery(node, indexPattern) {
   const [ fieldNameArg, ...args ] = node.arguments;
-  const fieldName = ast.toElasticsearchQuery(fieldNameArg, indexPattern);
+  const fieldName = nodeTypes.literal.toElasticsearchQuery(fieldNameArg);
   const field = indexPattern.fields.byName[fieldName];
   const queryParams = args.reduce((acc, arg) => {
     const snakeArgName = _.snakeCase(arg.name);

src/ui/public/kuery/functions/geo_polygon.js

@@ -15,7 +15,7 @@ export function buildNodeParams(fieldName, points) {
 
 export function toElasticsearchQuery(node, indexPattern) {
   const [ fieldNameArg, ...points ] = node.arguments;
-  const fieldName = ast.toElasticsearchQuery(fieldNameArg);
+  const fieldName = nodeTypes.literal.toElasticsearchQuery(fieldNameArg);
   const field = indexPattern.fields.byName[fieldName];
   const queryParams = {
     points: points.map(ast.toElasticsearchQuery)

src/ui/public/kuery/functions/range.js

@@ -24,7 +24,7 @@ export function buildNodeParams(fieldName, params, serializeStyle = 'operator')
 
 export function toElasticsearchQuery(node, indexPattern) {
   const [ fieldNameArg, ...args ] = node.arguments;
-  const fieldName = ast.toElasticsearchQuery(fieldNameArg);
+  const fieldName = nodeTypes.literal.toElasticsearchQuery(fieldNameArg);
   const field = indexPattern.fields.byName[fieldName];
   const namedArgs = extractArguments(args);
   const queryParams = _.mapValues(namedArgs, ast.toElasticsearchQuery);