shared: migrations: Add 4.sql: Begin trigram index

shared/migrations/4.sql

@@ -0,0 +1,3 @@
+CREATE VIRTUAL TABLE fts_trigram USING fts5(content, content='',tokenize="trigram");
+ALTER TABLE content ADD COLUMN fts_trigramid integer;
+CREATE INDEX content_fts_trigramid ON content (fts_trigramid);

shared/migrations/migrations.qrc

@@ -3,5 +3,6 @@
         <file>1.sql</file>
         <file>2.sql</file>
         <file>3.sql</file>
+        <file>4.sql</file>
     </qresource>
 </RCC>