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Create Predicate Index

The CreatePredIndex request creates an index on metadata fields to optimize predicate-based queries.

  • Input: Store name and list of predicate keys to index.

  • Behavior: Creates indices on the specified metadata fields for faster filtering.

  • Response: Confirmation of index creation.

Click to expand source code
import { createDbClient } from "ahnlich-client-node";
import { CreatePredIndex } from "ahnlich-client-node/grpc/db/query_pb";

async function createPredicateIndex() {
  const client = createDbClient("127.0.0.1:1369");

  await client.createPredIndex(
    new CreatePredIndex({
      store: "my_store",
      predicates: ["label", "category"],
    })
  );

  console.log("Predicate indices created successfully");
}

createPredicateIndex();

Parameters​

ParameterTypeRequiredDescription
storestringYesThe name of the store
predicatesstring[]YesList of metadata keys to index

Notes​

  • Indices significantly speed up predicate-based queries (GetPred, filtered GetSimN)
  • Creating indices has a one-time cost but improves query performance
  • Indices can also be specified during store creation