feat: expose considered indexes

Author: veksen

src/remote/optimization.ts

@@ -28,6 +28,7 @@ export const LiveQueryOptimization = z.discriminatedUnion("state", [
     costReductionPercentage: z.number(),
     indexRecommendations: z.array(IndexRecommendation),
     indexesUsed: z.array(z.string()),
+    consideredIndexes: z.array(IndexRecommendation).optional(),
     explainPlan: z.custom<PostgresExplainStage>(),
     optimizedExplainPlan: z.custom<PostgresExplainStage>(),
   }),

src/remote/query-optimizer.ts

@@ -429,6 +429,7 @@ export class QueryOptimizer extends EventEmitter<EventMap> {
             costReductionPercentage,
             indexRecommendations,
             indexesUsed,
+            consideredIndexes: mapConsideredIndexes(result),
             explainPlan,
             optimizedExplainPlan: result.explainPlan,
           };
@@ -512,6 +513,7 @@ export class QueryOptimizer extends EventEmitter<EventMap> {
       costReductionPercentage,
       indexRecommendations,
       indexesUsed,
+      consideredIndexes: mapConsideredIndexes(result),
       explainPlan,
       optimizedExplainPlan: result.explainPlan,
     };
@@ -582,6 +584,12 @@ function mapIndexRecommandations(
   });
 }
 
+function mapConsideredIndexes(
+  result: Extract<OptimizeResult, { kind: "ok" }>,
+): IndexRecommendation[] {
+  return Array.from(result.triedIndexes.values());
+}
+
 type PercentageDifference = number;
 
 export function costDifferencePercentage(