59 lines
2.4 KiB
SQL
59 lines
2.4 KiB
SQL
-- Create land use and fields
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--Landuse is hierarchical. Highest level is Order (Residential) then Group (Residential-Dwelling) then Class (Residential-Dwelling-Detached house)
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--Some ETL work required to get this together refer to analysis repo
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--Prerequesite is to have first run bulk_data_sources migrations
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--Then create table landuse_order for the app, this is used as foreign key for current and original landuse_order
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CREATE TABLE IF NOT EXISTS reference_tables.buildings_landuse_order AS
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SELECT a.landuse_id,
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a.description
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FROM reference_tables.landuse_classifications a
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WHERE a.level = 'order'
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AND a.is_used;
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ALTER TABLE reference_tables.buildings_landuse_order
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ADD UNIQUE (description);
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CREATE TABLE IF NOT EXISTS reference_tables.buildings_landuse_group AS
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SELECT a.landuse_id,
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a.description,
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a.parent_id AS parent_order_id
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FROM reference_tables.landuse_classifications a
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WHERE a.level = 'group'
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AND a.is_used;
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ALTER TABLE reference_tables.buildings_landuse_group
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ADD UNIQUE (description);
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--the below is for front end reference, not current used as a constraint
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CREATE TABLE IF NOT EXISTS reference_tables.buildings_landuse_class AS
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SELECT a.landuse_id,
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a.description,
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a.parent_id AS parent_group_id
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FROM reference_tables.landuse_classifications a
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WHERE a.level = 'class'
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AND a.is_used;
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--Landuse is hierarchical. Highest level is Order (Residential) then Group (Residential-Dwelling) then Class (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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--Prerequisite run bulk_sources migration first
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-- Land use is table with 3 levels of hierarchy (highest to lowest). order > group > class
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-- Land use order, singular. Client and db constrained with foreign key
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ALTER TABLE buildings
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ADD COLUMN IF NOT EXISTS current_landuse_order text,
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ADD FOREIGN KEY (current_landuse_order)
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REFERENCES reference_tables.buildings_landuse_order (description);
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-- Land use groups, array. Derived from classes.
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ALTER TABLE buildings ADD COLUMN IF NOT EXISTS current_landuse_group text ARRAY[41];
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-- Land use class or classes, array object, client constrained. ARRAY[] is used to constrain array size. The array is limited to 250 based on Westfield Stratford as a single toid with many uses, this may want to be reduced down to reduce maximum size.
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ALTER TABLE buildings ADD COLUMN IF NOT EXISTS current_landuse_class text ARRAY[250];
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