ClickHouse/dbms/tests/queries/0_stateless/00921_datetime64_compatibility.python

#!/usr/bin/env python
# encoding: utf-8

import re
import itertools

# Create SQL statement to verify dateTime64 is accepted as argument to functions taking DateTime.
functions="""
# toTimeZone({datetime}, 'UTC') -- does not work
toYear({datetime})
toQuarter({datetime})
toMonth({datetime})
toDayOfYear({datetime})
toDayOfMonth({datetime})
toDayOfWeek({datetime})
toHour({datetime})
toMinute({datetime})
toSecond({datetime})
toUnixTimestamp({datetime})
toStartOfYear({datetime})
toStartOfISOYear({datetime})
toStartOfQuarter({datetime})
toStartOfMonth({datetime})
toMonday({datetime})
# toStartOfWeek({datetime}) -- there is no such function
toStartOfDay({datetime})
toStartOfHour({datetime})
toStartOfMinute({datetime})
toStartOfFiveMinute({datetime})
toStartOfTenMinutes({datetime})
toStartOfFifteenMinutes({datetime})
# Do not workk with DateTime64
# toStartOfInterval({datetime}, INTERVAL 1 year)
# toStartOfInterval({datetime}, INTERVAL 1 month)
# toStartOfInterval({datetime}, INTERVAL 1 day)
# toStartOfInterval({datetime}, INTERVAL 15 minute)
toTime({datetime})
toRelativeYearNum({datetime})
toRelativeQuarterNum({datetime})
toRelativeMonthNum({datetime})
toRelativeWeekNum({datetime})
toRelativeDayNum({datetime})
toRelativeHourNum({datetime})
toRelativeMinuteNum({datetime})
toRelativeSecondNum({datetime})
toISOYear({datetime})
toISOWeek({datetime})
# toWeek({datetime}) -- Unknown function toWeek
# toYearWeek({datetime}) -- Unknown function toYearWeek
timeSlot({datetime})
toYYYYMM({datetime})
toYYYYMMDD({datetime})
toYYYYMMDDhhmmss({datetime})
# --  Illegal type DateTime64 of argument of function addYears
# addYears({datetime}, 1)
# addMonths({datetime}, 1)
# addWeeks({datetime}, 1)
# addDays({datetime}, 1)
# addHours({datetime}, 1)
# addMinutes({datetime}, 1)
# addSeconds({datetime}, 1)
# addQuarters({datetime}, 1)
# -- Illegal type DateTime64 of argument of function subtractYears.
# subtractYears({datetime}, 1)
# subtractMonths({datetime}, 1)
# subtractWeeks({datetime}, 1)
# subtractDays({datetime}, 1)
# subtractHours({datetime}, 1)
# subtractMinutes({datetime}, 1)
# subtractSeconds({datetime}, 1)
# subtractQuarters({datetime}, 1)
CAST({datetime} as DateTime)
CAST({datetime} as Date)
CAST({datetime} as UInt64)
formatDateTime({datetime}, '%C %d %D %e %F %H %I %j %m %M %n %p %R %S %t %T %u %V %w %y %Y %%')
""".splitlines()

# filter out empty lines and commented out lines
COMMENTED_OUT_LINE_RE = re.compile(r"^\s*#")
functions = list(filter(lambda f: len(f) != 0 and COMMENTED_OUT_LINE_RE.match(f) == None, functions))

# Expanded to cartesian product of all arguments.
# NOTE: {{datetime}} to be turned into {datetime} after str.format() for keys (format string), but not for list of values!
extra_ops =\
[
    # With same type:
    (
        '{{datetime}} {op} {{datetime}}',
        {
            'op':
            [
                '- ', # does not work, but should it?
                '+ ', # does not work, but should it?
                '!=', '==', # how do we expect this to work?
                '< ',
                '<=',
                '> ',
                '>='
            ]
        }
    ),
    # With other DateTime types:
    (
        '{{datetime}} {op} {arg}',
        {
            'op':
            [
                '-', # does not work, but should it?
                '!=', '==', # how do we expect this to work?
                # these are naturally expected to work, but they don't:
                '< ',
                '<=',
                '> ',
                '>='
            ],
            'arg': ['now()', 'toDate(now())'],
        }
    ),
    # With arithmetic types
    (
        '{{datetime}} {op} {arg}',
        {
            'op':
            [
                '+ ',
                '- ',
                '==',
                '!=',
                '< ',
                '<=',
                '> ',
                '>='
            ],
            'arg':
            [
                '1',
                '-1',
                'toInt64(1)',
                'toInt64(-1)'
            ],
        },
    ),
]

# Expand extra_ops here
for f, args in extra_ops:
    args_keys = args.keys()
    for args_vals in itertools.product(*args.values()):
        func = f.format(**dict(zip(args_keys, args_vals)))
        functions.append(func)

datetime64_args = ['now64(0)', 'now64(3)', 'now64(6)', 'now64(9)', 'now64(12)', 'now64(15)']

# TODO: use string.Template here to allow lines that do not contain type, like: SELECT CAST(toDateTime64(1234567890), 'DateTime64')
for func in functions:
    for dt in datetime64_args:
        f = func.format(datetime=dt)
        print("""SELECT '{function}';""".format(function=f))
        print("""SELECT {function};""".format(function=f))