d597076038
Subtle bug that occurred selecting after a join
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Outer joins add the placeholder '---' that is used as some sort of NULL
value.
However select operations on such relations would always fail, because
relations are supposed to only contain values of class rstring, and
the placeholder was added as a regular string.
As a consequence, automatic casting would always fail, and the select
would always raise an exception.
Added a new test case with this specific case in mind.
2015-09-10 12:19:51 +07:00
a059afa9ce
Added new tests on joins
2015-06-06 14:06:02 +07:00
8cb08ad030
Change relational language to use math symbols
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The symbols previously used were a Canadian script, and were looking
good enough, but they might not be installed in every machine.
Besides, all this is to workaround a Qt5 bug that prevents from
rendering those symbols at times.
2015-05-31 19:01:03 +07:00
a355762fc4
Switch core module to Python3
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The core module (the relational algebra, not the interface) is now
using Python3
Tests are passing, so it should be ok.
2015-02-19 12:42:41 +07:00
2e0cbf94a7
- Can convert the expressions into python code objects as well
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- Can test that the code objects work as expected too.
2013-02-10 14:11:26 +07:00
3978259f4a
- improved an optimization, to produce a simpler select condition under certain circumstances
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git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@343 014f5005-505e-4b48-8d0a-63407b615a7c
2011-11-07 19:01:33 +07:00
36d52b144a
- Using more the colored class
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- Todo
git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@298 014f5005-505e-4b48-8d0a-63407b615a7c
2011-05-02 10:02:06 +07:00
4a296c52cf
- termcolor modified to use bold by default
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- uses colors in readline
git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@297 014f5005-505e-4b48-8d0a-63407b615a7c
2011-04-01 10:28:47 +07:00
f8b0ab746b
- Added test
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- Re-sorted CHANGELOG
git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@286 014f5005-505e-4b48-8d0a-63407b615a7c
2011-03-22 13:28:41 +07:00
3e04c24056
- Added new test
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- More details in test driver
- Re-building GUI, idioticly eliminated long ago
git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@277 014f5005-505e-4b48-8d0a-63407b615a7c
2011-03-20 17:16:34 +07:00
1e51f9784f
- test driver script is now executable
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- adds more generic procedure to perform implicit casting, thus eliminating duplicate code
git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@271 014f5005-505e-4b48-8d0a-63407b615a7c
2011-03-03 09:27:53 +07:00
ba564b55d3
- Added two more tests
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- Simplified code of optimizations module
- Improved doc of optimization module
- Added option to get all the intermediate passages of optimization
git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@269 014f5005-505e-4b48-8d0a-63407b615a7c
2011-02-24 13:27:33 +07:00
71697bb2e8
- Implemented select_union_intersect_subtract general optimization
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- Added tests for the new optimization
git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@268 014f5005-505e-4b48-8d0a-63407b615a7c
2011-02-18 18:11:39 +07:00
3e2d33f1d5
- Added tests
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- Driver can test on pure python code
git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@266 014f5005-505e-4b48-8d0a-63407b615a7c
2010-12-23 10:11:14 +07:00
6e16a0d841
- Added new test
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- Changed some comments
git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@263 014f5005-505e-4b48-8d0a-63407b615a7c
2010-10-26 13:54:34 +07:00
3d6e0590c0
- Added other tests to expose potential optimization problems
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git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@261 014f5005-505e-4b48-8d0a-63407b615a7c
2010-10-11 10:51:37 +07:00
3d21363e46
- Added tests
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git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@258 014f5005-505e-4b48-8d0a-63407b615a7c
2010-10-06 21:44:13 +07:00
8224033881
- Fixed tokenize_select that was not providing level prop for the tokens anymore
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git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@257 014f5005-505e-4b48-8d0a-63407b615a7c
2010-10-06 12:31:48 +07:00
54d1301a96
- Added other tests
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- Driver can handle exceptions
git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@255 014f5005-505e-4b48-8d0a-63407b615a7c
2010-10-04 12:46:18 +07:00
48e6ecb7ba
- Added test driver
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- Added some basic tests, mostly to test the driver itself
git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@254 014f5005-505e-4b48-8d0a-63407b615a7c
2010-10-04 10:06:17 +07:00
Salvo 'LtWorf' Tomaselli
LtWorf