Add migrations

Author: PhilippMDoerner

flyway.conf

@@ -0,0 +1,4 @@
+flyway.url=jdbc:sqlite:./db.sqlite3
+flyway.locations=filesystem:./sql
+flyway.user=sa
+flyway.password=

sql/V1.6__Cascade_Delete_Markers.sql

@@ -1,3 +1,4 @@
+-- Create a new table map_marker2 with the Cascade Delete
 CREATE TABLE "map_marker2" (
     "id" integer PRIMARY KEY AUTOINCREMENT,
     "icon" varchar(200),
@@ -13,6 +14,8 @@ CREATE TABLE "map_marker2" (
     FOREIGN KEY ("location_id") REFERENCES "wikientries_location" ("id") DEFERRABLE INITIALLY DEFERRED,
     FOREIGN KEY ("map_id") REFERENCES "map_map" ("id") ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED
 );
+
+-- Copy the data from the old map_marker table to the new map_marker2 table
 INSERT INTO map_marker2 (icon, longitude, latitude, map_id, location_id, type_id, creation_datetime, update_datetime, color)
 SELECT 
     icon,
@@ -26,5 +29,8 @@ SELECT
     color
 FROM map_marker;
 
+-- Drop the old map_marker table
 DROP TABLE map_marker;
+
+-- Rename the new map_marker2 table to map_marker
 ALTER TABLE map_marker2 RENAME TO map_marker;

sql/V1.7__Cascade_Delete_QuoteConnections.sql

@@ -0,0 +1,27 @@
+-- Create a temporary table to hold the data from the quoteconnection table
+CREATE TABLE "wikientries_quoteconnection_temp" (
+  "id" integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+  "character_id" integer NOT NULL REFERENCES "wikientries_character" ("id") DEFERRABLE INITIALLY DEFERRED,
+  "quote_id" integer NOT NULL
+);
+
+-- Copy the data from the quoteconnection table to the temporary table
+INSERT INTO "wikientries_quoteconnection_temp" ("id", "character_id", "quote_id")
+SELECT "id", "character_id", "quote_id" FROM "wikientries_quoteconnection";
+
+-- Drop the old quoteconnection table
+DROP TABLE "wikientries_quoteconnection";
+
+-- Create the new quoteconnection table with the foreign key constraint
+CREATE TABLE "wikientries_quoteconnection" (
+  "id" integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+  "character_id" integer NOT NULL REFERENCES "wikientries_character" ("id") DEFERRABLE INITIALLY DEFERRED,
+  "quote_id" integer NOT NULL REFERENCES "wikientries_quote" ("id") ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED
+);
+
+-- Copy the data from the temporary table to the new quoteconnection table
+INSERT INTO "wikientries_quoteconnection" ("id", "character_id", "quote_id")
+SELECT "id", "character_id", "quote_id" FROM "wikientries_quoteconnection_temp";
+
+-- Drop the temporary table
+DROP TABLE "wikientries_quoteconnection_temp";