47       const result = await this.query(`
53       await this.query(
56       await this.query(`create view ${this.tableName('freq')}
69       await this.query(`create view ${this.tableName('idle')}
82       await this.query(`create virtual table ${this.tableName('freq_idle')}
86       await this.query(`create virtual table ${this.tableName('span_activity')}
91       await this.query(`create view ${this.tableName('activity')}
117     this.query(`update ${this.tableName('window')} set
124     let query = `select ts, dur, cast(idle as DOUBLE), freq
128       query = `select
148     const freqResult = await this.query(query);
180   private async query(query: string) {  method in CpuFreqTrackController
181     const result = await this.engine.query(query);
183       console.error(`Query error "${query}": ${result.error}`);
184       throw new Error(`Query error "${query}": ${result.error}`);