From ecb9b3ab07a8d938d11138cb83751dbc5ce14b1a Mon Sep 17 00:00:00 2001
From: Pjotr Prins
Date: Sat, 12 Aug 2023 08:12:58 -0500
Subject: Add comment on Strain table

---
 examples/dump-species-metadata.scm | 42 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/examples/dump-species-metadata.scm b/examples/dump-species-metadata.scm
index 3e429f0..a7e242a 100755
--- a/examples/dump-species-metadata.scm
+++ b/examples/dump-species-metadata.scm
@@ -55,6 +55,48 @@
     (set gnt:family (field Species Family))
     (set gnt:organism (ontology 'taxon: (field Species TaxonomyId)))))
 
+#!
+
+The ProbeData table contains StrainID.
+
+MariaDB [db_webqtl]> select * from ProbeData limit 2;
++--------+----------+---------+
+| Id     | StrainId | value   |
++--------+----------+---------+
+| 503636 |       42 | 11.6906 |
+| 503636 |       43 | 11.4205 |
++--------+----------+---------+
+
+Likewise
+
+MariaDB [db_webqtl]> select * from ProbeSetData wher limit 2;
++----+----------+-------+
+| Id | StrainId | value |
++----+----------+-------+
+|  1 |        1 | 5.742 |
+|  1 |        2 | 5.006 |
++----+----------+-------+
+
+To get at the strain use
+
+MariaDB [db_webqtl]> select * from Strain where Id=1 limit 15;
++----+--------+--------+-----------+--------+-------+
+| Id | Name   | Name2  | SpeciesId | Symbol | Alias |
++----+--------+--------+-----------+--------+-------+
+|  1 | B6D2F1 | B6D2F1 |         1 | NULL   | NULL  |
++----+--------+--------+-----------+--------+-------+
+
+A typical query may look like
+
+SELECT Strain.Name, Strain.Id FROM Strain, Species
+WHERE Strain.Name IN f{create_in_clause(self.samplelist)}
+AND Strain.SpeciesId=Species.Id
+AND Species.name = %s, (self.group.species,)
+
+At this point it is not very clear how Name, Name2, Symbol and Alias are used.
+
+!#
+
 (define-dump dump-strain
   (tables (Strain
            (left-join Species "ON Strain.SpeciesId = Species.SpeciesId")))
-- 
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