Second checkpoint

migrations/00003_create_datasets_table.sql

@@ -0,0 +1,39 @@
+-- +goose Up
+CREATE TYPE file_type AS ENUM ('vector_with_kato', 'vector', 'raster');
+
+CREATE TABLE datasets (
+    id           UUID PRIMARY KEY       DEFAULT gen_random_uuid(),
+    category_id  UUID         NOT NULL  REFERENCES categories (id) ON DELETE RESTRICT,
+    code         VARCHAR(255) NOT NULL,
+    name         VARCHAR(255) NOT NULL,
+    description  TEXT,
+    unit         VARCHAR(255),
+    filename     VARCHAR(255) NOT NULL,
+    storage_key  TEXT         NOT NULL,
+    cog_storage_key TEXT,                -- Cloud-Optimized GeoTIFF (raster only)
+    file_type    file_type    NOT NULL,
+    size_bytes   BIGINT       NOT NULL  DEFAULT 0,
+    content_type VARCHAR(255) NOT NULL  DEFAULT '',
+    properties   JSONB,
+    meta         JSONB,
+    automated    BOOLEAN      NOT NULL  DEFAULT false,
+    status       VARCHAR(255) NOT NULL  DEFAULT 'pending',
+    -- vector_with_kato attribute-table parsing + mapping
+    attribute_columns JSONB,            -- detected columns: [{name, samples}]
+    kato_column       VARCHAR(255),     -- user-selected KATO column
+    year_columns      JSONB,            -- mapping: [{column, date}]
+    parse_error       TEXT,             -- failure reason when status = 'failed'
+    -- Footprint/extent in EPSG:4326 (any geometry type). The SRID is constrained
+    -- so geometry and the derived bbox are always comparable.
+    geometry     geometry(Geometry, 4326),
+    created_at   TIMESTAMPTZ  NOT NULL  DEFAULT now(),
+    updated_at   TIMESTAMPTZ  NOT NULL  DEFAULT now()
+);
+
+CREATE INDEX idx_datasets_category_id ON datasets (category_id);
+CREATE INDEX idx_datasets_geometry ON datasets USING GIST (geometry);
+CREATE INDEX idx_datasets_created_at ON datasets (created_at DESC);
+
+-- +goose Down
+DROP TABLE datasets;
+DROP TYPE file_type;