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v.dissolve: Compute attribute aggregate statistics #2388

Merged
merged 24 commits into from
Jul 22, 2023
Merged

v.dissolve: Compute attribute aggregate statistics #2388

merged 24 commits into from
Jul 22, 2023

Commits on Jul 19, 2023

  1. v.dissolve: Compute attribute aggregate statistics 

    In addition to geometry dissolving, compute aggregate statistics for the attribute values of dissolved features with v.db.univar.

Requires v.db.univar JSON output. v.db.select with group is used to obtain unique values of the column the dissolving is based on. Add column and update now happens for every value, column, and statistics.
    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  2. Create columns only for the first value, support null (not clear how … 

    …supported in the rest of the code), test
    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  3. More tests, fix optional aggregation and multiple column creation

    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  4. Create and update all columns at once

    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  5. Create transaction in a function

    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  6. Support direct SQL as a backend besides v.db.univar. Handle cleanup f… 

    …rom the main function. Remove global variables. Use PID and node name for the temporary vector.
    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  7. Functions for common aggregation functionality; shorter code. Simplif… 

    …y dev null in cleanup code. Modernize and Pylint generic error message.
    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  8. Test for dissolve/merge of areas without shared boundaries.

    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  9. Support any layer, not just 1

    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  10. Check for valid methods more clear with ints than bools

    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  11. Notebook with examples and test

    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  12. Do not generate all combinations when all options are provided, add d… 

    …ocumentation
    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  13. Partially modernize the existing code by using gs alias instead of gr… 

    …ass alias
    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  14. Image to doc, generated in notebook

    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  15. Result of in is bool, no need to convert

    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  16. Remove duplicate columns and methods for non-explicit automatic (inte… 

    …ractive) result column handling
    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  17. Support SQL expressions as columns (as in v.db.update query_column or… 

    … v.db.select columns)
    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  18. Support also text-returning aggregate function such as SQLite group_c… 

    …oncat.
    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  19. Add examples to documentation, use plural for columns and methods

    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  20. Add simple SQL escape function to double single quotes

    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  21. Flip some conditions for better readability and less indentation

    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  22. Improve author lists

    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  23. Support general SQL syntax just like v.db.select for the price of les… 

    …s checks. Now depends on v.db.select producing the list of column names OSGeo#3090. Test and example included.
    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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  24. Add more description and see also

    @wenzeslaus
    wenzeslaus committed Jul 19, 2023
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