--- doc/build/Attic/loncapasqldatabase.html	2001/02/15 15:04:04	1.11
+++ doc/build/Attic/loncapasqldatabase.html	2001/02/20 22:24:45	1.15
@@ -8,7 +8,7 @@
 Scott Harrison
 </P>
 <P>
-Last updated: 02/14/2001
+Last updated: 02/15/2001
 </P>
 <P>
 This file describes issues associated with LON-CAPA
@@ -32,6 +32,72 @@ and a SQL database.
 </P>
 <H2>Important notes</H2>
 <P>
+The current database is implemented assuming a non-adjustable
+architecture involving these data fields (specific to each version
+of a resource).
+<UL>
+<LI>title</LI>
+<LI>author</LI>
+<LI>subject</LI>
+<LI>notes</LI>
+<LI>abstract</LI>
+<LI>mime</LI>
+<LI>language</LI>
+<LI>creationdate</LI>
+<LI>lastrevisiondate</LI>
+<LI>owner</LI>
+<LI>copyright</LI>
+</UL>
+</P>
+<P>
+Security occurs as a function of the user 'www',
+and the permissions on the files in the /usr/local/mysql
+directory.  (These files and directories should
+be 700, 600, 500, 400, etc; not allow access to anyone
+but user 'www'.)
+</P>
+<P>
+These commands create the loncapameta database.
+<PRE>
+mysql> CREATE DATABASE IF NOT EXISTS loncapa;
+mysql> USE loncapa;
+mysql> CREATE TABLE IF NOT EXISTS metadata (title TEXT, author TEXT, subject TEXT, notes TEXT, abstract TEXT, mime TEXT, language TEXT, creationdate TEXT, lastrevisiondate TEXT, owner TEXT, copyright TEXT, FULLTEXT idx_title (title), FULLTEXT idx_author (author), FULLTEXT idx_subject (subject), FULLTEXT idx_notes (notes), FULLTEXT idx_abstract (abstract), FULLTEXT idx_mime (mime), FULLTEXT idx_language (language), FULLTEXT idx_creationdate (creationdate), FULLTEXT idx_lastrevisiondate (lastrevisiondate), FULLTEXT idx_owner (owner), FULLTEXT idx_copyright (copyright)) TYPE=MYISAM;
+mysql> INSERT INTO metadata VALUES ('1','2','3','4','5','6','7','8','9','10','11');
+mysql> SELECT * FROM metadata WHERE title REGEXP "1";
+</PRE>
+</P>
+<P>
+Current time values for things.
+<PRE>
+fenchurch.lite.msu.edu
+Mem:    46812K av,   45632K used,    1180K free,   14756K shrd,    4292K buff
+Swap: 1148608K av,   11260K used, 1137348K free                   13244K cached
+
+Red Hat Linux release 6.2 (Zoot)
+Kernel 2.2.16-3 on an i586
+</PRE>
+<BR>Q: How big are data records in test database? A: on average, 1000 bytes each, medline records from PubMed.
+<BR>Q: How big is the biggest field? A: on average, 838 bytes each
+<BR>Q: How much time to insert 5284 medline records into database?
+A: 600 seconds
+<BR>Q: What about when using "speed-technique" on page 130? A: 689 seconds (weird, eh?)
+<BR>Q: What about REGEXP searching? A: about 1-2 seconds for small fields;
+10 to 20 seconds for REGEXP search on "abstract" field
+<BR>Q: What about FULLTEXT indexing? A: about 6 seconds for abstract field.
+
+</P>
+<P>
+An important quote from the manual:
+<BLOCKQUOTE>
+In MySQL Version 3.23.23 or later, you can also create special FULLTEXT indexes. They are used for full-text search. Only the MyISAM table type supports FULLTEXT indexes. They can be created only from
+VARCHAR and TEXT columns. Indexing always happens over the entire column and partial indexing is not supported. See section 25.2 MySQL Full-text Search for details. 
+</BLOCKQUOTE>
+</P>
+<P>
+I plan on using a MyISAM table type with 11 metadata fields of column 
+type=TEXT.
+</P>
+<P>
 It might be worthwhile to look at /usr/local/mysql/manual.html.
 It is quite in depth.
 </P>
@@ -339,7 +405,7 @@ These files are installed.
 </P>
 <P>
 This is how I installed the DBI perl modules.
-<PRE>
+<PRE>$dbh
 [root@fenchurch DBI-1.14]# perl Makefile.PL
 *** Note:
     The optional PlRPC-modules (RPC::PlServer etc) are not installed.
@@ -378,7 +444,7 @@ All tests successful, 1 test skipped.
 Files=7,  Tests=179,  7 wallclock secs ( 6.46 cusr +  0.49 csys =  6.95 CPU)
 PERL_DL_NONLAZY=1 /usr/bin/perl -Iblib/arch -Iblib/lib -I/usr/lib/perl5/5.00503/i386-linux -I/usr/lib/perl5/5.00503 test.pl
 test.pl 
-DBI test application $Revision: 1.11 $
+DBI test application $Revision: 1.15 $
 Using /home/user/DBI-1.14/blib
 Switch: DBI 1.14 by Tim Bunce, 1.14
 Available Drivers: ADO, ExampleP, Multiplex, Proxy, mysql