添加时间条件通用函数common_datetime_wheres

[jackiect]

# smartsql_ext.py

def common_datetime_wheres(f_datetime, start_time=None, end_time=None):

    wheres = Condition('TRUE')

    if start_time is not None:
        wheres &= (f_datetime >= start_time)

    if end_time is not None:
        wheres &= (f_datetime < end_time)

    return wheres