Function explain

packages/db/src/services/chart-sql.test.ts:46–50

(sql: string)

let chReachable = false;

async function explain(sql: string): Promise<void> {
  // EXPLAIN runs the parser + analyzer and builds the query plan, which
  // catches UNKNOWN_IDENTIFIER and AMBIGUOUS_IDENTIFIER. It does not execute.
  await ch.command({ query: `EXPLAIN ${sql}` });
}

beforeAll(async () => {
  // The chart service is chatty; mute log spam during the test run.