-- +goose Up
-- +goose StatementBegin
-- Shared, write-once lookup of classifications. A row is reused only when
-- every content column matches; any difference (e.g. a changed description)
-- creates a new row.
--
-- When adding a new scheme flag column (e.g. "is_unspsc"), the same migration
-- must drop and recreate "classification_codes_content" with the new column
-- included, otherwise rows differing only by that flag would be merged.
CREATE TABLE IF NOT EXISTS "classification_codes" (
	"id" INTEGER PRIMARY KEY,
	"is_cpv" BOOLEAN NOT NULL,
	"code" TEXT NOT NULL,
	"classification" TEXT NOT NULL
);

CREATE UNIQUE INDEX IF NOT EXISTS "classification_codes_content"
	ON "classification_codes" ("is_cpv", "code", "classification");
CREATE INDEX IF NOT EXISTS "classification_codes_code"
	ON "classification_codes" ("code");
-- +goose StatementEnd

-- +goose Down
-- +goose StatementBegin
DROP TABLE IF EXISTS "classification_codes";
-- +goose StatementEnd