BigQuery pre-aggregations datetime error

[itestyoy]

Hi!
Cube (1.2.9) generates SQL to pre-aggregated table but doesn’t cast field to datetime
when we use filter by this member.

            pre_aggregations: PRE_AGGREGATIONS_ENABLED ? {
                model__daily_analysis_rollup_by_activity: {
                    dimensions: (CUBE) => [
                        CUBE.app_name,
                        CUBE.cohort_date,
                     
                    ],
                    measures: (CUBE) => [
                        CUBE.count,
                    ],

                    time_dimensions: [
                        { dimension: (CUBE) => CUBE.cohort_date, granularity: 'day' },
                        { dimension: (CUBE) => CUBE.cohort_date, granularity: 'week' },
                        { dimension: (CUBE) => CUBE.cohort_date, granularity: 'month' },
                        { dimension: (CUBE) => CUBE.cohort_date, granularity: 'quarter' },
                        { dimension: (CUBE) => CUBE.cohort_date, granularity: 'year' },
                    ],