20e9299226
-link to https://github.com/colouring-london/colouring_london_analysis/blob/master/bulk_extracts/nlud_landuse_classification.sql
29 lines
1.2 KiB
SQL
29 lines
1.2 KiB
SQL
--Landuse is hierachical. Highest level is Order (ie. Residential) then Group (ie Residential-Dwelling) then Class (ie Residential-Dwelling-Detached house)
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--Interface will collected most detailed (class) but visualise highest level (order)
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--Landuse is a table as #358
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-- Land use is table with 3 levels of hierachy (highest to lowest). order > group > class
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DROP TABLE IF EXISTS landuse_classifications;
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-- Land use class or classes, array object, client constrained.
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ALTER TABLE buildings DROP COLUMN IF EXISTS current_landuse_class;
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-- Land use order, singular. Client and db constrained.
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ALTER TABLE buildings DROP COLUMN IF EXISTS current_landuse_order;
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--Land use class, group and order will be stored in a new table
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DROP TABLE building_landuse IF EXISTS CASCADE;
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--===========================================
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--
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-- We also collect original landuse, structure & process is as current land use
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-- We don't currently collect intermediate historic uses
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--
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--===========================================
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-- Original Land use class or classes, array object, client constrained.
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ALTER TABLE buildings DROP COLUMN IF EXISTS original_landuse_class;
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-- Land use order, singular. Client and db constrained.
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ALTER TABLE buildings DROP COLUMN IF EXISTS original_landuse_order;
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