add index on genres.parent_ID

Author: agoerler

srv/src/main/resources/application.yaml

@@ -126,6 +126,7 @@ cds:
 spring:
   config.activate.on-profile: default
   sql.init.platform: h2
+  sql.init.schema-locations: classpath:schema-h2.sql,classpath:indices-h2.sql
 cds:
   data-source:
     auto-config.enabled: false

srv/src/main/resources/indices-h2.sql

@@ -0,0 +1 @@
+CREATE INDEX genres_parent_id ON my_bookshop_Genres(parent_ID);