fix(sql): set empty string as default compression alg

Signed-off-by: Thomas Bétrancourt <thomas@betrancourt.net>

Author: rclsilver

sql/migrations/010_fix_resolution_compression_step.sql

@@ -0,0 +1,15 @@
+-- +migrate Up
+
+UPDATE "resolution" SET "steps_compression_alg" = '' WHERE "steps_compression_alg" IS NULL;
+
+ALTER TABLE "resolution" ALTER COLUMN "steps_compression_alg" SET NOT NULL;
+ALTER TABLE "resolution" ALTER COLUMN "steps_compression_alg" SET DEFAULT '';
+
+INSERT INTO "utask_sql_migrations" VALUES ('v1.21.1-migration010');
+
+-- +migrate Down
+
+ALTER TABLE "resolution" ALTER COLUMN "steps_compression_alg" DROP NOT NULL;
+ALTER TABLE "resolution" ALTER COLUMN "steps_compression_alg" DROP DEFAULT;
+
+DELETE FROM "utask_sql_migrations" WHERE current_migration_applied = 'v1.21.1-migration010';

sql/schema.sql

@@ -100,7 +100,7 @@ CREATE TABLE "resolution" (
     crypt_key BYTEA NOT NULL,
     encrypted_resolver_input BYTEA,
     encrypted_steps BYTEA NOT NULL,
-    steps_compression_alg TEXT,
+    steps_compression_alg TEXT NOT NULL DEFAULT '',
     base_configurations JSONB NOT NULL
 );