adjacent_tbox_tbox adjacent_tbox_tbox_internal after_tbox_tbox after_tbox_tbox_internal before_tbox_tbox before_tbox_tbox_internal contained_tbox_tbox contained_tbox_tbox_internal contains_tbox_tbox contains_tbox_tbox_internal DatumGetTboxP ensure_has_T_tbox ensure_has_X_tbox ensure_same_dimensionality_tbox float_period_to_tbox float_timestamp_to_tbox float_to_tbox float_to_tbox_internal int_period_to_tbox int_timestamp_to_tbox int_to_tbox int_to_tbox_internal left_tbox_tbox left_tbox_tbox_internal number_to_box number_to_tbox overafter_tbox_tbox overafter_tbox_tbox_internal overbefore_tbox_tbox overbefore_tbox_tbox_internal overlaps_tbox_tbox overlaps_tbox_tbox_internal overleft_tbox_tbox overleft_tbox_tbox_internal overright_tbox_tbox overright_tbox_tbox_internal period_to_tbox period_to_tbox_internal periodset_to_tbox periodset_to_tbox_internal PG_GETARG_TBOX_P PG_RETURN_TBOX_P range_period_to_tbox range_timestamp_to_tbox range_to_tbox range_to_tbox_internal right_tbox_tbox right_tbox_tbox_internal same_tbox_tbox same_tbox_tbox_internal tbox_cmp tbox_cmp_internal tbox_constructor tbox_constructor_t tbox_copy tbox_eq tbox_eq_internal tbox_expand tbox_expand_temporal tbox_expand_value tbox_ge tbox_gt tbox_in tbox_intersection tbox_intersection_internal tbox_le tbox_lt tbox_make tbox_minus_internal tbox_ne tbox_out tbox_set tbox_set_precision tbox_shift_tscale tbox_tmax tbox_tmin tbox_to_floatrange tbox_to_period tbox_union tbox_union_internal tbox_xmax tbox_xmin TboxPGetDatum timestamp_to_tbox timestamp_to_tbox_internal timestampset_to_tbox timestampset_to_tbox_internal

tbox_xmin() Datum tbox_xmin ( PG_FUNCTION_ARGS  ) Returns the minimum X value of the temporal box value.