Mercurial > p > roundup > code
annotate roundup/anypy/cmp_.py @ 6806:bdd28b244839
- issue2551223 - fix timestamp truncation in mysql and postgresql
The data types used to represent timestamps in pg and mysql for
ephemeral tables: sessions and otks don't have enough signifcant
digits to work. As a result the timestamps are rounduped (up/down)
rsuling in the stored timestamp being 2 minutes (pg) or 2-3
hours(mysql) off from what it should be.
Modify db schema to use a numeric type that preserves more significant
figures. Implement schema upgrade. Document need for upgrade in
upgrading.txt.
Write tests for schema upgrade.
Implement test for updateTimestamp method on BasicDatabase that showed
this issue in the first place. Write overrides for test for
anydbm/memorydb which store timestamp properly or not at all.
| author | John Rouillard <rouilj@ieee.org> |
|---|---|
| date | Mon, 25 Jul 2022 17:20:20 -0400 |
| parents | 142553f58694 |
| children | 706f3be6ffbb |
| rev | line source |
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1 try: |
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2 None < 0 |
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4 def NoneAndDictComparable(v): |
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5 return v |
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6 except TypeError: |
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7 # comparator to allow comparisons against None and dict |
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8 # comparisons (these were allowed in Python 2, but aren't allowed |
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9 # in Python 3 any more) |
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10 class NoneAndDictComparable(object): |
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11 def __init__(self, value): |
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12 self.value = value |
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13 |
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14 def __cmp__(self, other): |
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15 if not isinstance(other, self.__class__): |
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16 raise TypeError('not comparable') |
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17 |
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18 if self.value == other.value: |
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19 return 0 |
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20 |
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21 elif self.value is None: |
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22 return -1 |
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23 |
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24 elif other.value is None: |
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25 return 1 |
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26 |
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27 elif type(self.value) == tuple and type(other.value) == tuple: |
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28 for lhs, rhs in zip(self.value, other.value): |
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29 lhsCmp = NoneAndDictComparable(lhs) |
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30 rhsCmp = NoneAndDictComparable(rhs) |
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31 result = lhsCmp.__cmp__(rhsCmp) |
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32 if result != 0: |
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33 return result |
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34 |
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35 return len(self.value) - len(other.value) |
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36 |
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37 elif type(self.value) == dict and type(other.value) == dict: |
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38 diff = len(self.value) - len(other.value) |
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39 if diff == 0: |
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40 lhsItems = tuple(sorted(self.value.items(), |
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41 key=NoneAndDictComparable)) |
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42 rhsItems = tuple(sorted(other.value.items(), |
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43 key=NoneAndDictComparable)) |
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44 return -1 if NoneAndDictComparable(lhsItems) < NoneAndDictComparable(rhsItems) else 1 |
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45 else: |
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46 return diff |
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47 |
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48 elif self.value < other.value: |
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49 return -1 |
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50 |
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51 else: |
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52 return 1 |
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53 |
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54 def __eq__(self, other): |
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55 return self.__cmp__(other) == 0 |
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57 def __ne__(self, other): |
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58 return self.__cmp__(other) != 0 |
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60 def __lt__(self, other): |
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61 return self.__cmp__(other) < 0 |
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63 def __le__(self, other): |
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64 return self.__cmp__(other) <= 0 |
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66 def __ge__(self, other): |
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67 return self.__cmp__(other) >= 0 |
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69 def __gt__(self, other): |
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70 return self.__cmp__(other) > 0 |
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71 |
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73 def _test(): |
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74 Comp = NoneAndDictComparable |
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75 |
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76 assert Comp(None) < Comp(0) |
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77 assert Comp(None) < Comp('') |
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78 assert Comp(None) < Comp({}) |
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79 assert Comp((0, None)) < Comp((0, 0)) |
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80 assert not Comp(0) < Comp(None) |
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81 assert not Comp('') < Comp(None) |
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82 assert not Comp({}) < Comp(None) |
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83 assert not Comp((0, 0)) < Comp((0, None)) |
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84 |
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85 assert Comp((0, 0)) < Comp((0, 0, None)) |
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86 assert Comp((0, None, None)) < Comp((0, 0, 0)) |
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87 |
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88 assert Comp(0) < Comp(1) |
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89 assert Comp(1) > Comp(0) |
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90 assert not Comp(1) < Comp(0) |
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91 assert not Comp(0) > Comp(0) |
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92 |
| 6047 | 93 assert Comp({0: None}) < Comp({0: 0}) |
| 94 assert Comp({0: 0}) < Comp({0: 1}) | |
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95 |
| 6047 | 96 assert Comp({0: 0}) == Comp({0: 0}) |
| 97 assert Comp({0: 0}) != Comp({0: 1}) | |
| 98 assert Comp({0: 0, 1: 1}) > Comp({0: 1}) | |
| 99 assert Comp({0: 0, 1: 1}) < Comp({0: 0, 2: 2}) | |
| 100 | |
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101 |
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102 if __name__ == '__main__': |
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103 _test() |
