From 891f237e7171b08056b21d6f7b45c8b3764c457c Mon Sep 17 00:00:00 2001
From: David Stuve <david.stuve@hp.com>
Date: Mon, 7 Apr 2003 19:04:54 +0000
Subject: [PATCH] added 11 indices, essentially to any table row that was
 heavily queried, and the table was large - sort_authors, sort_titles,
 handles, resourcepolicy-objecttype & id, dcvalue-itemid, etc.

git-svn-id: http://scm.dspace.org/svn/repo/trunk@620 9c30dcfa-912a-0410-8fc2-9e0234be79fd
---
 dspace/etc/database_schema.sql | 39 ++++++++++++++++++++++++++++++++--
 1 file changed, 37 insertions(+), 2 deletions(-)

diff --git a/dspace/etc/database_schema.sql b/dspace/etc/database_schema.sql
index cb632297d0..498e471fcd 100644
--- a/dspace/etc/database_schema.sql
+++ b/dspace/etc/database_schema.sql
@@ -170,6 +170,9 @@ CREATE TABLE EPerson
   phone	              VARCHAR(32)
 );
 
+-- index by email
+CREATE INDEX eperson_email_idx ON EPerson(email);
+
 -------------------------------------------------------
 -- EPersonGroup table
 -------------------------------------------------------
@@ -210,6 +213,9 @@ CREATE TABLE Item2Bundle
   bundle_id INTEGER REFERENCES Bundle(bundle_id)
 );
 
+-- index by item_id
+CREATE INDEX item2bundle_item_idx on Item2Bundle(item_id);
+
 -------------------------------------------------------
 -- Bundle2Bitstream table
 -------------------------------------------------------
@@ -220,6 +226,9 @@ CREATE TABLE Bundle2Bitstream
   bitstream_id INTEGER REFERENCES Bitstream(bitstream_id)
 );
 
+-- index by bundle_id
+CREATE INDEX bundle2bitstream_bundle_idx ON Bundle2Bitstream(bundle_id);
+
 -------------------------------------------------------
 -- DCTypeRegistry table
 -------------------------------------------------------
@@ -246,8 +255,10 @@ CREATE TABLE DCValue
   source_id  INTEGER
 );
 
--- An index for dctypes
-CREATE INDEX dcvalue_dc_type_id_idx  on DCValue(dc_type_id);
+-- An index for item_id - almost all access is based on
+-- instantiating the item object, which grabs all dcvalues
+-- related to that item
+CREATE INDEX dcvalue_item_idx on DCValue(item_id);
 
 -------------------------------------------------------
 -- Community table
@@ -303,6 +314,9 @@ CREATE TABLE Collection2Item
   item_id       INTEGER REFERENCES Item(item_id)
 );
 
+-- index by collection_id
+CREATE INDEX collection2item_collection_idx ON Collection2Item(collection_id);
+
 -------------------------------------------------------
 -- ResourcePolicy table
 -------------------------------------------------------
@@ -318,6 +332,10 @@ CREATE TABLE ResourcePolicy
   end_date             DATE
 );
 
+-- index by resource_type,resource_id - all queries by
+-- authorization manager are select type=x, id=y, action=z
+CREATE INDEX resourcepolicy_type_id_idx ON ResourcePolicy(resource_type_id,resource_id); 
+
 -------------------------------------------------------
 -- EPersonGroup2EPerson table
 -------------------------------------------------------
@@ -328,6 +346,10 @@ CREATE TABLE EPersonGroup2EPerson
   eperson_id       INTEGER REFERENCES EPerson(eperson_id)
 );
 
+-- Index by group ID (used heavily by AuthorizeManager)
+CREATE INDEX epersongroup2eperson_group_idx on EPersonGroup2EPerson(eperson_group_id);
+
+
 -------------------------------------------------------
 -- Handle table
 -------------------------------------------------------
@@ -339,6 +361,9 @@ CREATE TABLE Handle
   resource_id      INTEGER
 );
 
+-- index by handle, commonly looked up
+CREATE INDEX handle_handle_idx ON Handle(handle);
+
 -------------------------------------------------------
 --  WorkspaceItem table
 -------------------------------------------------------
@@ -454,6 +479,9 @@ CREATE TABLE ItemsByAuthor
    sort_author        TEXT
 );
 
+-- index by sort_author, of course!
+CREATE INDEX sort_author_idx on ItemsByAuthor(sort_author);
+
 -------------------------------------------------------
 --  CollectionItemsByAuthor view
 -------------------------------------------------------
@@ -483,6 +511,10 @@ CREATE TABLE ItemsByTitle
    sort_title         TEXT
 );
 
+-- index by the sort_title
+CREATE INDEX sort_title_idx on ItemsByTitle(sort_title);
+
+
 -------------------------------------------------------
 --  CollectionItemsByTitle view
 -------------------------------------------------------
@@ -511,6 +543,9 @@ CREATE TABLE ItemsByDate
    date_issued        TEXT
 );
 
+-- sort by date
+CREATE INDEX date_issued_idx on ItemsByDate(date_issued);
+
 -------------------------------------------------------
 --  CollectionItemsByDate view
 -------------------------------------------------------