Better sequence links

HEADER.txt

@@ -0,0 +1,15 @@
+${projectName}
+Copyright (C) ${year}  ${owner}
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.

build.gradle.kts

@@ -13,7 +13,7 @@ plugins {
 }
 
 group = "io.github.asm0dey"
-version = "0.1.2"
+version = "0.1.3"
 application {
     mainClass.set("io.github.asm0dey.ApplicationKt")
 

src/flyway/resources/db/migration/V6__sequence_ids.sql

@@ -0,0 +1,8 @@
+ALTER TABLE book
+    ADD COLUMN seqid INT;
+
+UPDATE book
+SET seqid=numbers.seqrow
+FROM (SELECT ROW_NUMBER() OVER () seqrow, seqname
+      FROM (SELECT DISTINCT(sequence) seqname FROM book WHERE book.sequence IS NOT NULL ORDER BY sequence)) AS numbers
+WHERE book.sequence = numbers.seqname;