(Tim DiLauro et al)

- Added indices recommended by John Hopkins University


git-svn-id: http://scm.dspace.org/svn/repo/trunk@1192 9c30dcfa-912a-0410-8fc2-9e0234be79fd

dspace/etc/database_schema.sql

@@ -325,6 +325,11 @@ CREATE TABLE Community2Collection
   collection_id  INTEGER REFERENCES Collection(collection_id)
 );
 
+-- Index on community ID
+CREATE INDEX Community2Collection_community_id_idx ON Community2Collection(community_id);
+-- Index on collection ID
+CREATE INDEX Community2Collection_collection_id_idx ON Community2Collection(collection_id);
+
 -------------------------------------------------------
 -- Collection2Item table
 -------------------------------------------------------
@@ -337,6 +342,8 @@ CREATE TABLE Collection2Item
 
 -- index by collection_id
 CREATE INDEX collection2item_collection_idx ON Collection2Item(collection_id);
+-- and item_id
+CREATE INDEX Collection2Item_item_id_idx ON Collection2Item( item_id );
 
 -------------------------------------------------------
 -- ResourcePolicy table
@@ -384,6 +391,8 @@ CREATE TABLE Handle
 
 -- index by handle, commonly looked up
 CREATE INDEX handle_handle_idx ON Handle(handle);
+-- index by resource id and resource type id
+CREATE INDEX handle_resource_id_and_type_idx ON handle(resource_id, resource_type_id);
 
 -------------------------------------------------------
 --  WorkspaceItem table
@@ -503,6 +512,9 @@ CREATE TABLE Communities2Item
    item_id                 INTEGER REFERENCES Item(item_id)
 );
 
+-- Index by item_id for update/re-index
+CREATE INDEX Communities2Item_item_id_idx ON Communities2Item( item_id );
+
 -------------------------------------------------------
 -- Community2Item view
 ------------------------------------------------------
@@ -525,6 +537,8 @@ CREATE TABLE ItemsByAuthor
 
 -- index by sort_author, of course!
 CREATE INDEX sort_author_idx on ItemsByAuthor(sort_author);
+-- And by item ID for updates/re-indexing
+CREATE INDEX ItemsByAuthor_item_id_idx ON ItemsByAuthor(item_id);
 
 -------------------------------------------------------
 --  CollectionItemsByAuthor view
@@ -557,7 +571,8 @@ CREATE TABLE ItemsByTitle
 
 -- index by the sort_title
 CREATE INDEX sort_title_idx on ItemsByTitle(sort_title);
-
+-- And by item ID for updates/re-indexing
+CREATE INDEX ItemsByTitle_item_id_idx ON ItemsByTitle(item_id);
 
 -------------------------------------------------------
 --  CollectionItemsByTitle view
@@ -589,6 +604,8 @@ CREATE TABLE ItemsByDate
 
 -- sort by date
 CREATE INDEX date_issued_idx on ItemsByDate(date_issued);
+-- And by item ID for updates/re-indexing
+CREATE INDEX ItemsByDate_item_id_idx ON ItemsByDate(item_id);
 
 -------------------------------------------------------
 --  CollectionItemsByDate view
@@ -618,6 +635,9 @@ CREATE TABLE ItemsByDateAccessioned
    date_accessioned              TEXT
 );
 
+-- Index on item_id for update/re-indexing
+CREATE INDEX ItemsByDateAccessioned_item_id_idx ON ItemsByDateAccessioned(item_id);
+
 -------------------------------------------------------
 --  CollectionItemsByDateAccession view
 -------------------------------------------------------

dspace/etc/database_schema_12-13.sql

@@ -67,4 +67,23 @@ ALTER TABLE collection ADD submitter INTEGER REFERENCES EPersonGroup( eperson_gr
 
 ALTER TABLE collection ADD admin INTEGER REFERENCES EPersonGroup( eperson_group_id );
 
-ALTER TABLE eperson ADD netid varchar(64) UNIQUE;
+ALTER TABLE eperson ADD netid varchar(64) UNIQUE;
+
+-------------------------------------------------------------------------------
+-- Additional indices for performance
+-------------------------------------------------------------------------------
+
+-- index by resource id and resource type id
+CREATE INDEX handle_resource_id_and_type_idx ON handle(resource_id, resource_type_id);
+
+-- Indexing browse tables update/re-index performance
+CREATE INDEX Communities2Item_item_id_idx ON Communities2Item( item_id );
+CREATE INDEX ItemsByAuthor_item_id_idx ON ItemsByAuthor(item_id);
+CREATE INDEX ItemsByTitle_item_id_idx ON ItemsByTitle(item_id);
+CREATE INDEX ItemsByDate_item_id_idx ON ItemsByDate(item_id);
+CREATE INDEX ItemsByDateAccessioned_item_id_idx ON ItemsByDateAccessioned(item_id);
+
+-- Improve mapping tables
+CREATE INDEX Community2Collection_community_id_idx ON Community2Collection(community_id);
+CREATE INDEX Community2Collection_collection_id_idx ON Community2Collection(collection_id);
+CREATE INDEX Collection2Item_item_id_idx ON Collection2Item( item_id );