c47823616a
Remove the compiled files from the source. Running from sources will require an extra make step that will generate the necessary ui modules.
52 lines
1.2 KiB
Markdown
52 lines
1.2 KiB
Markdown
Relational an educational tool to provide a workspace for experimenting with *relational* *algebra*, an offshoot of first-order logic.
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It provides GUI that can be used for executing relational queries, and also provides a command line interface.
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Provides a standalone Python module that can be used for executing relational queries, parsing relational expressions and optimizing them.
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Official website
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================
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More documentation can be found here http://ltworf.github.io/relational/
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Install
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=======
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Binary download for Windows can be obtained from the website.
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For Linux, check your distribution's packages, relational is available on Debian and Ubuntu.
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Syntax
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======
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These are some valid queries
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```
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σage > 25 and rank == weight(A)
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σ (name.upper().startswith('J') and age>21 )(people)
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Q ⋈ π a,b(A) ⋈ B
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ρid➡i,name➡n(A) - π a,b(π a,b(A)) ∩ σage > 25 or rank = weight(A)
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π a,b(π a,b(A))
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ρid➡i,name➡n(π a,b(A))
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A ⋈ B
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```
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Run from sources
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================
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To launch the application, run
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```
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make
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./relational_gui.py
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```
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If it needs some dependencies:
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Qt5, Python 3.4 or greater, PyQt5, pyuic5
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It can run on osx but bugreports about that will be rejected.
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