Function changeContextStatus

frontend/src/react/hooks/useExecuteSQL.ts:111–139

(
    database: string,
    ctx: SQLEditorDatabaseQueryContext,
    status: QueryContextStatus
  )

  // state, detects no change, and returns the same state reference —
  // Zustand then skips firing subscribers, and the UI never re-renders.
  const changeContextStatus = (
    database: string,
    ctx: SQLEditorDatabaseQueryContext,
    status: QueryContextStatus
  ) => {
    const patch: Partial<SQLEditorDatabaseQueryContext> = { status };
    switch (status) {
      case "EXECUTING": {
        patch.abortController = new AbortController();
        patch.beginTimestampMS = Date.now();
        break;
      }
      case "CANCELLED":
        ctx.abortController?.abort();
        break;
      case "DONE":
        break;
    }
    const next = getSQLEditorTabsState().updateDatabaseQueryContext({
      database,
      contextId: ctx.id,
      context: patch,
    });
    if (!next) {
      // Ad-hoc context (not in the tab's map): mirror the patch onto
      // the passed-in object so awaiters can still observe the result.
      Object.assign(ctx, patch);
    }
  };

  const preExecute = useCallback(
    async (params: SQLEditorQueryParams) => {