Bug-482/output_error_on_old_experiments

Created by: KFilippopolitis

Changelog: Reverting back changes to 7_0 migration script. Adding the new changes to a new 7_1 migration script.

src/main/resources/db/migration/V7_0__NewDatabaseStructure.sql

+UPDATE experiment
+SET algorithms =
+    (
+        SELECT SUBSTR(algorithms, 2, LENGTH(algorithms) - 2)
+    );
 
 UPDATE experiment
 SET workflowstatus = 'error'
@@ -21,12 +26,10 @@ DROP COLUMN hasservererror,
 DROP COLUMN validations,
 DROP COLUMN model_slug;
 
-ALTER TABLE experiment RENAME algorithms TO algorithm;
-UPDATE experiment SET algorithm = (algorithm::json ->> 0);
-UPDATE experiment SET algorithmId = (algorithm::json ->> 'name');
-ALTER TABLE experiment ADD COLUMN algorithmId text;
-UPDATE experiment SET result = result::json #>>'{0,result}' WHERE (algorithm::json->>'type') <> 'workflow';
-
+ALTER TABLE experiment
+RENAME algorithms TO algorithm;
+ALTER TABLE experiment
+ALTER COLUMN algorithm TYPE json USING algorithm::json;
 ALTER TABLE experiment
 RENAME createdby_username TO created_by_username;
 ALTER TABLE experiment
@@ -36,6 +39,14 @@ RENAME resultsviewed TO viewed;
 ALTER TABLE experiment
 RENAME workflowstatus TO status;
 
+ALTER TABLE experiment
+ADD COLUMN algorithmId text;
+
+UPDATE experiment
+SET algorithmId = (algorithm ->> 'name');
+
+ALTER TABLE experiment
+ALTER COLUMN algorithm TYPE text;
 ALTER TABLE experiment
 ADD COLUMN updated timestamp without time zone;
 
@@ -70,4 +81,4 @@ DROP TABLE "query";
 DROP TABLE "dataset";
 DROP TABLE "config";
 DROP TABLE "vote", "app";
-DROP TABLE "user_roles", "user_languages";
+DROP TABLE "user_roles", "user_languages";
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