Function fetchFromTable

packages/query/src/graphql/plugins/GetMetadataPlugin.ts:135–158

(
  pgClient: Client,
  schemaName: string,
  chainId: string | undefined,
  useRowEst: boolean
)

let defaultMetadataName: string;

export async function fetchFromTable(
  pgClient: Client,
  schemaName: string,
  chainId: string | undefined,
  useRowEst: boolean
): Promise<MetaData> {
  let metadataTableName: string;

  if (!chainId) {
    // return first metadata entry you find.
    if (defaultMetadataName === undefined) {
      const {rows} = await pgClient.query(
        `SELECT table_name FROM information_schema.tables where table_schema='${schemaName}'`
      );
      const {table_name} = rows.find((obj: {table_name: string}) => matchMetadataTableName(obj.table_name));
      defaultMetadataName = table_name;
    }
    metadataTableName = defaultMetadataName;
  } else {
    metadataTableName = getMetadataTableName(chainId);
  }

  return fetchMetadataFromTable(pgClient, schemaName, metadataTableName, useRowEst);
}

function metadataTableSearch(build: Build): boolean {
  return !!(build.pgIntrospectionResultsByKind as PgIntrospectionResultsByKind).attribute.find((attr) =>